RMRE1H9P–. Sea mosses. A collector's guide and an introduction to the study of marine Algae. Algae. EcTOCARPus viRiDis, Han PLATE IV.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Hervey, A. B. (Alpheus Baker), 1839-1931. Boston, S. E. Cassino
RM2HB7G2W–Ectocarpus distortus, Anna Atkins, United Kingdom, c. 1843 - c. 1853, photographic support, cyanotype, height 250 mm × width 200 mm
RMPFHBBN–. Dansk botanisk arkiv. Plants; Plants -- Denmark. 14 Dansk Botanisk Arkiv, Bd. 2. Nr. 2. Ectocarpus Rallsiæ is evidently nearly related to Ectocarpus coniferus and Ectocarpus irregularis. The most essential differences are as follows: the frequently stalked sporangia, the shape of the plurilocular sporan- gia, this being more cylindrical, tapering rather suddenly to- wards the apex (comp. Mlle Vickeks' fig. 1. c); and also the distri- bution of the sporan- gia, these being placed anywhere upon the filaments, much more irregularly than in Ectocarpus coniferus. Furthermore the fila- ments in Ec
RMRMWFH9–. Annales des Sciences Naturelles Botaniques. Anrh.d&r Sczencnat' 2e'Sérce'- Boù. Tonv. 22., l°t. Fy.i-5 Ectocarpus cruciatus. Fzy. 6.Filament? corfervoïdw de, ^lïimanthalia for.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Paris
RMPFHBB6–. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Børgesen: Phæophyceæ of the Danish W. Indies. 19 The chromatophores have the form of irregularly bent filaments. This species seems to come quite near if it is not indeed identical with the form described and figured by Mme Weber in "Liste des Algues du Siboga", I, p. 128 and here designated Ectocarpus elachistæformis Heydr. prox. The way of growing, the shape and size of the sporangia, the breadth of the assimilating filaments all seem exactly the same.. Fig. 11. Ectocarpus elachistæformis Heydr. Parts of thallus with plurilocula
RMRPWF3W–. Album général des diatomées marines, d'eau douce ou fossiles : album représentant tous les genres de diatomées et leurs principales espèces. Diatoms. Pilayella littoralis. Ectocarpus species. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Coupin, Henri, b. 1868. Paris : H. Coupin
RMPFHBCJ–. Dansk botanisk arkiv. Plants; Plants -- Denmark. 4 Dansk Botanisk Arkiv, Bd. 2. No. 2. half this length; their diameter may reach 50//, but is usually about 25—27//. The unilocular sporangia (Fig. 1, Fig. 2 /) are obovate-oval, sessile, attaining a length up to 110// and a breadth of about 70//.. Fig. 1. Ectocarpus Duchassaingianus Grun. Filaments with plurilocular sporangia and a single unilocular. (About 90: 1). The present species was found with both kinds of sporangia in the months December—March. This species seems to be nearly related to Ectocarpus indicus Sonder (comp, the figure give
RMRPWF3G–. Album général des diatomées marines, d'eau douce ou fossiles : album représentant tous les genres de diatomées et leurs principales espèces. Diatoms. Ectocarpus Lebelii. Ectocarpus Holmesii Ectocarpus Irregularis. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Coupin, Henri, b. 1868. Paris : H. Coupin
RMPFHBBT–. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Borgesen: Phæophyceæ of the Danish W. Indies. 9 Sporangia plurilocularia plerumque axillaria, sessilia, dense aggregata, conico-elongata, magnitudine variabili, minora = 40// long, et 24// lat., majora = 110// long, et 40// lat., plerumque 1—3, rarius plura aggregata. Sporangia unilocularia ovata. Chro- matophora disciformia numerosa in cellulis præsentia. The plant is fixed to the substratum by means of short. Fig. 5. Ectocarpus coniferus nov. spec. Part of a plant with plurilocular sporangia. (About 60: 1). rhizoids growing out from the l
RMRPWF3H–. Album général des diatomées marines, d'eau douce ou fossiles : album représentant tous les genres de diatomées et leurs principales espèces. Diatoms. ALG^. PL 176.. Ectocarpus Lebelii. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Coupin, Henri, b. 1868. Paris : H. Coupin
RMPFHBBW–. Dansk botanisk arkiv. Plants; Plants -- Denmark. 10 Dansk Botanisk Arkiv, Bd. 2. Nr. 2. are terminated with long hairs consisting at the end of long and nearly colourless cells and having a growing-point at their base. The ramification is very irregular being sometimes nearly secund, sometimes alternating, just as the distance between the. Fig. 6. Ectocarpus coniferus nov. spec. a, part of thallus with a few plurilocular sporangia in each angle of branch. b, part of thallus with a plurilocular sporangium upon the main branch. c, plurilocular sporangia, d, unilocular sporangium, e, base of a
RMRE2N8W–. Elementary botany. Botany. ALG^ CONTliVUED: CLASSIFICATION. 171 Classification.—KjcUman dividus the Phx-oph'(.ea:- into two orders. 369. Order Phseosporalea (Phseosporeae) including 18 families. One of the most conspicuous families is the Laminariacea-, including among others the (iiant Kelps mentioned above (Laminaria, Postelsia, Macrocystis, etc.). 370. Order Cyclosporalea (Cyclosporeae).—This includes one family, the Fucacea: with Ectocarpus, Sphacelaria, La-athesia, Fucus, Sargassum, etc. Class Rhodophyceee. 371. The red algse (Ehodophyceaej.—The larger number of the so-called red algse
RMPFYERC–. A text-book of botany for secondary schools. Botany. 120 A TEXT-l;Oi.»K OP BOTANY of vegetation floating in mid-ocean continue to grow luxu- riantly, especially in warmer parts of the Atlantic. From the ashes of kelps and rockweeds the chief supply of iodine is obtained; and these great masses of vegetation,. Fig. 112.—Fragment of Sargassiim. shewing (iifTerentiation of the thallus into stem-like and leaf-like portions, and also the bladder-like floats.—After Bennktt and Murray, thrown up or left exposed by tlie tides, are used for enriching farm lands. 72. Ectocarpus.—The two principal grou
RMRPWF3M–. Album général des diatomées marines, d'eau douce ou fossiles : album représentant tous les genres de diatomées et leurs principales espèces. Diatoms. ALGu^. PL 174,. Ectocarpus repens VIII. PH^OPHYCE^ [Algues brunes 14. Ectocarpaceœ C. — 23.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Coupin, Henri, b. 1868. Paris : H. Coupin
RMPFHBCD–. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Borgesen: Phæophyceæ o! the Danish W. Indies. O Siboga", I, 1913, p. 130) and to Ectocarpus simpliciusculus of Askenasy (Alg. Gazelle, p. 20, tab. V, fig. 1, 11) which, as pointed out by Mme Weber, most probably belongs to Ectocarpus indicus. Mme Weber does not mention the shape of the chromatophores of. Fig. 2. Ectocarpus Duchassaingianus Grun. a, basal, creeping filament, b, filament with a long, cylindrical plurilocular sporangium and unilocular sporangia, c, plurilocular sporangia placed upon the main filament, d, plurilocular spor
RMRH29CC–. British sea-weeds : drawn from Professor Harvey's "Phycologia Britannica" .... Marine algae. Platr XIX.. 83.—Ectocarpus Hincksiae, Ha7-v. 84.—Ectocarpus tomentosus, Lyngh.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Gatty, Alfred, Mrs. , 1809-1873; Harvey, William H. (William Henry), 1811-1866. Phycologia britannica. London : Bell and Daldy
RMPG4B9M–. Botany for agricultural students . Botany. ROCKWEEDS AND GULFWEEDS (FUCALES) 321 The gametes are produced in a multicellular structure known as a gametangium, and, as in case of a sporangium, the gametan- gium may be formed from a cell within the filament or from a terminal cell on a short lateral branch. The small cubical cells composing a gametangium are packed closely together and each. Fig. 276. — Portions of two fila- ments of Ectocarpus, showing repro- duction. At s are shown spo- rangia, and between the filaments, a zoospore. At g are shown a game- tangium and a single sperm and two s
RMRPWF3R–. Album général des diatomées marines, d'eau douce ou fossiles : album représentant tous les genres de diatomées et leurs principales espèces. Diatoms. Ectocarpus species. c d Ectocarpus Padinae VIII. PH^OPHYCEJE {Algues brunes) 14. Ectocarpaceœ. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Coupin, Henri, b. 1868. Paris : H. Coupin
RMPFHBC9–. Dansk botanisk arkiv. Plants; Plants -- Denmark. 6 Dansk Botanisk Arkiv, Bd. 2. Nr. 2. It grows in the littoral and uppermost part of the sublittoral region, most often in sheltered places, but also in more exposed and seems to be a common species. It was found, St. Croix: Christiansteds Harbour and in the lagoon near this town. St. Thomas: The Harbour in several places. St. Jan: Cruz Bay and off America Hill in a depth of about 20 metres. Geogr. Distrib. West Indies.. Fig. 3. Ectocarpus Mitchellæ Harv. a, part of thallus with plurilocular sporangia, b, part of thallus with young branchlets.
RMRE2N9B–. Elementary botany. Botany. B E Fig. 172. 4 Ectocarpus siliculosus; B. branch with a young and a ripe plurilocular Tporangmm; £, gametes fusmg to form zygospore. (B, after Thuret; £, after Berthold.J. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Atkinson, George Francis, 1854-1918. New York : H. Holt
RMPFHBB7–. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Børgesen: Phæophyceæ of the Danish W. Indies. 17 6. Ectocarpus breviarticulatus J. Ag. J. Agardh, Nya alger från Mexico (Öfversigt af K. Vetensk.-Akad. Forhandl. 15. Jan., 1847, p. 7). Ectocarpus hamatus Cr. in Maze et Schramm, Essai de classification des Algues de la Guadeloupe, 2e Edit. 1870-1877, p. 111. Vickers, A., Phycologia Barbadensis, part II, pi. 29. By means of original specimens collected by Liebmann near St. Augustin in Mexico and determined by J. Agardh I have been able to see that Ectocarpus hamatus of Crouan, so well figured
RM2EBAX06–Ectocarpus siliculosus
RM2AATYE7–Ectocarpus brachiatus Plate not in contents list.; Ectocarpus brachiatus.
RMRPWF3P–. Album général des diatomées marines, d'eau douce ou fossiles : album représentant tous les genres de diatomées et leurs principales espèces. Diatoms. ALG^. PL 173.. 9 y^9/ Ectocarpus siliculosus VIII. PH^^OPHYCE^ [Algues brunes) Ectocarpus Sandrianus. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Coupin, Henri, b. 1868. Paris : H. Coupin
RMPFHBB8–. Dansk botanisk arkiv. Plants; Plants -- Denmark. 16 Dansk Botanisk Arkiv, Bd. 2. Nr. 2. Only plurilocular sporangia were met with; their shape was rather characteristic being oval-rectangular with roundish angles (Fig. 9 a and b); a few longer, clavate sporangia with undu- lated walls were also found (Fig. 9 c, d). The loculi are large, about 8 p high and 10 p broad. The oval sporangia were about 22 p broad and 33 p long; the longer, clavate ones up to 64 p long and 27 p broad. The sporangia are mostly sessile, rarely borne on a short stalk (Fig. 9 e).. Fig. 9. Ectocarpus rhodochortonoides n
RM2EBAX0D–Ectocarpus granulosus
RMRPWF3J–. Album général des diatomées marines, d'eau douce ou fossiles : album représentant tous les genres de diatomées et leurs principales espèces. Diatoms. ALG^^. PL 175.. ; 1. > - -'i Ectooarpus secundus VIII. PHu^OPHYCE^ {Algues brunes) Ectocarpus investiens 14. Ectocarpaceœ. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Coupin, Henri, b. 1868. Paris : H. Coupin
RMPFH932–. Dansk plantevaekst. Plants; Plant ecology. 262 1^- Forandringer af den færdige Strandeng gi'unden til venstre en helt tilvokset Lo). Ude i de store Loer vokse mange Vandplanter [Myriophylhwt verticiUatum, Potamogeton pusillus, P. pedinatus og P. perfoliatus, Ruppia, Clddophora, Entero- morpha, Ectocarpus littoralis o. a.). I den østfriesiske Marsk ere Loerne ofte omgivne af Bræmmer af Ohione portulacoides [Buchenau, 1889). Loerne kunne, om man saa maa sige, de ud, idet den ydre Ende paa en eller anden Maade afspærres fra Havet, f. Eks. ved en Strand-. rig. iss. Grønningen ved Nordby; Udsigt
RM2EBAWY8–Ectocarpus crinitus
RMRH9HDG–. Botany of the Faeröes, based upon Danish investigations. Botany -- Faroe islands. 416 The Færoese specimens agree very well with Kuckuck's description and figures. They have frequently 2—3 and sometimes even 4 terminal sporangia on each branch (see fig. 74), but very often the sporangia occur singly at the apices of the branches, as is chiefly the case in the Heligoland specimens. The sporangia attain to a length of about 60 /x and to a breadth of about 18 [i. It was found intermixed with Rhizoclonium both on fairlv ex-. Fig. 74. Ectocarpus lucifugus Kuck. 160 : 1. posed coasts and in shelte
RM2EBAWXT–Ectocarpus littoralis
RMRDXTCT–. A textbook of botany for colleges and universities ... Botany. THALLOPHYTES 47 cell. In such filamentous bodies as were met among the green algae, the filament is elongated by the division of all the cells ; in other words, the power of cell-divi- sion is distributed throughout the filament. In Ectocarpus this power of cell- division to elongate the filament is more restricted, often being specially present in a region behind the tip, where the divisions occur in unusually rapid succession. In Sphacdaria this special power has become restricted to the apical cell, which. Fig. 124. â Macrocys
RMW27047–Archive image from page 28 of Dansk botanisk arkiv (1913-1981). Dansk botanisk arkiv danskbotaniskark02dans Year: 1913-1981 F. Borgesen: Phæophyceæ o the Danish W. Indies. O Siboga', I, 1913, p. 130) and to Ectocarpus simpliciusculus of Askenasy (Alg. Gazelle, p. 20, tab. V, fig. 1, 11) which, as pointed out by Mme Weber, most probably belongs to Ectocarpus indicus. Mme Weber does not mention the shape of the chromatophores of Fig. 2. Ectocarpus Duchassaingianus Grun. a, basal, creeping filament, b, filament with a long, cylindrical plurilocular sporangium and unilocular sporangia, c, plu
RMRPWF3F–. Album général des diatomées marines, d'eau douce ou fossiles : album représentant tous les genres de diatomées et leurs principales espèces. Diatoms. Ectocarpus Holmesii Ectocarpus Irregularis. Ectocarpus parasiticus VIII. PH^OPHYCE^ {Algues brunes) Ectocarpus lucifugus 14. Ectocarpaceœ. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Coupin, Henri, b. 1868. Paris : H. Coupin
RMW270FJ–Archive image from page 29 of Dansk botanisk arkiv (1913-1981). Dansk botanisk arkiv danskbotaniskark02dans Year: 1913-1981 6 Dansk Botanisk Arkiv, Bd. 2. Nr. 2. It grows in the littoral and uppermost part of the sublittoral region, most often in sheltered places, but also in more exposed and seems to be a common species. It was found, St. Croix: Christiansteds Harbour and in the lagoon near this town. St. Thomas: The Harbour in several places. St. Jan: Cruz Bay and off America Hill in a depth of about 20 metres. Geogr. Distrib. West Indies. Fig. 3. Ectocarpus Mitchellæ Harv. a, part of t
RMRHA2F4–. Botanische Zeitung. Plants; Plants. — 161 — Für die Richtigkeit, dass die feineu Plasmaschäume von Urtica uud manchen Fucus- hyphen den grossmaschigen Schäumen vieler Algen entsprechen, zeugt wohl nebenstehende graphische Darstellung. Gcrüstsubstanz zweifellos Lamellen bildend. Cladophora Nicht sicher entscheidbar. Cladophora Ectocarpus litoralis (grosse Waben1. Chaetopteris Girandia (normal entwickelte Zelle). Entcromorpha clathrata, Eichjota (Epidermis). Ectocarpus litoralis (kleinere Waben). Fucus (Hyphe grossmaschig). Girandia (junge Zelle), Calothrix (Haarzelle). Girandia (kurze Zeit vo
RMRPWF3N–. Album général des diatomées marines, d'eau douce ou fossiles : album représentant tous les genres de diatomées et leurs principales espèces. Diatoms. 9 y^9/ Ectocarpus siliculosus VIII. PH^^OPHYCE^ [Algues brunes) Ectocarpus Sandrianus. Ectocarpus cpiniger 14. Ectocarpaceœ. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Coupin, Henri, b. 1868. Paris : H. Coupin
RMRPX7RD–. The algae. Algae. SUMMER NAPLES. IRISH SEA Fig. 71 Diagram to show different life cycles recorded for Ectocarpus siliculosis from different localities. A schema of the Irish sea cycle is seen in Fig. 71. It has been suggested that the differences between the plants from the two locaUties are due to differences in the tides, light conditions or temperature, with perhaps more emphasis on the last. A further study of the NeapoUtan form by Schussnig and Kothbauer (i934) has subsequently revealed the existence of unilocular sporangia, although the products from these did not undergo fusion. The r
RMRH9HF5–. Botany of the Faeröes, based upon Danish investigations. Botany -- Faroe islands. 410 Some specimens from Strænder (Ost.) which I must regard as belonging to the typical form bore quantities of plurilocular as well as unilocular sporangia on the same plant, sometimes even intermixed on the same branch; but either one or the other kind greatly predominated on the same branch, and either exclusively unilocular or plurilocular sporangia were frequently met with. The unilocular sporangia often occurred in great abundance and were. Fig. 70. Ectocarpus fasciculatus (Griff. Harv. var. refracta (Kii
RMRDWC5H–. The essentials of botany. Botany. 200 PHYLUM V. PHAEOPHYCEAE 304. Among the commonest of the smaller Brown Algae are the species of Ectocarpus in which the plant body is composed of simple or branched filaments which may attain a length of many centimeters. They are firmly rooted below, and their tufted filaments float as dark brown masses in the tide currents near the shore. They are propagated by zoospores produced in one- celled sporangia which occur on the sides of the filaments. These zoospores are oval, pointed anteriorly, and have two long cilia which are attached near together at one
RMRH9HER–. Botany of the Faeröes, based upon Danish investigations. Botany -- Faroe islands. 411 plurilocular sporangia (b), which latter have not been found on Bet pyenocarpus. I have also come across plurilocular sporangia occurring on rhizoids such as were observed by Sauvageau (1. c). They are found on thc basal rhizoids, especially of the older piants.. Fig. 71. Ectocarpus fasciculatus (Griff.) Harv. Formå, a portion of a plant with unilocular sporangia; b branch with plurilocular sporangia; c cell with chromatophores. a and b 160: 1; c 200: 1. This species is most commonly met with on exposed coa
RMRDWG7K–. Nature and development of plants. Botany. DEVELOPMENT OF PLANTS 203 some of its characteristics will reappear in Bryophyta. The gametes themselves, however, show the same range of vari- ations as previously noted. In the simpler types of this genus they are quite alike and on the same plane of differentiation as. Fig. 119. Reproduction of Ectocarpus: A, branch bearing several spo- rangia, sp; g, zoospore enlarged. B, branch bearing gametangia, gm. C, the upper motionless gamete (female) surrounded by several still motile gametes (males). D, fusion of the gametes, below the resulting gametosp
RMRHYDRM–. Beitrge zur Biologie der Pflanzen. Plant physiology; Plants. 499 Schema. Gerüstsubstanz zweifellos Laraellen bildend. Cladophora Nicht sicher t -o entscheidbar, . Cladophora Ectocarpus litorulis (grosse Waben) Chaeiopferis Oirmidia (normal entwickelte Zelle) Enteromorj^lta clathrnta, Diclyola (Epidernils) Ectocarpus litoralis (kleinere Waben) Fucus (Hyphe grossniaschig) Giraudia (junge Zelle), Calothrix (Haarzelle) Giraiidia (kurze Zeit vor der Sporangienbildiing) Fucus (in nebeneinanderliegenden Hyphen; v. 8) Urtica (am Kern ruhend), Bryopsis, Calothrix (Haaranfang). Fig. 4. analoge Strukt
RMRE1R7T–. Nature and development of plants. Botany. DEVELOPMENT OF PLANTS 203 some of its characteristics will reappear in Bryophyta. The gametes themselves, however, show the same range of vari- ations as previously noted. In the simpler types of this genus they are quite alike and on the same p'ane of differentiation as. Fig. 119. Reproduction of Ectocarpus: A, branch bearing several spo- rangia, sp; g, zoospore enlarged. B, branch bearing gametangia, gm. C, the upper motionless gamete (female) surrounded by several still motile gametes (males). D, fusion of the gametes, below the resulting gametosp
RMRD417A–. Dansk botanisk arkiv. Plants; Plants -- Denmark. 4 Dansk Botanisk Arkiv, Bd. 2. No. 2. half this length; their diameter may reach 50//, but is usually about 25—27//. The unilocular sporangia (Fig. 1, Fig. 2 /) are obovate-oval, sessile, attaining a length up to 110// and a breadth of about 70//.. Fig. 1. Ectocarpus Duchassaingianus Grun. Filaments with plurilocular sporangia and a single unilocular. (About 90: 1). The present species was found with both kinds of sporangia in the months December—March. This species seems to be nearly related to Ectocarpus indicus Sonder (comp, the figure give
RMRHN1TH–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. B. FIGURE 8. Tracks of male gametes approaching female gametes or artificial attractant sources. A: A male gamete of Ectocarpus siliculnsus in contact with cover-slip (below), and in vicinity of female gamete (above). Broad sections of tracks indicate phases with bent hind flagellum. From Geller and Miiller (1981). B: Tracks of several freshly released spermatozoids from 4 male plants of Laminaria digitata (corners) approaching a spherosil particle containing lamoxirene (center). From Maier (1984). C: Tracks of Fucus spirali
RMRH9YDP–. Botanique cryptogamique, ou Histoire des familles naturelles des plantes infrieures. ECTOCARPEES. Tribus H. ECTOCAlil'E.E. Ftocci arliculati (ex utriculis composai unica série superpositis) varie ramosi, liberi vel in thallum disciformem adpressum coaliti. Thecse ex unico vel extremo ramulorum ramellorumve lateralium articulo. ECTOCARPUS.M.M./Î.Floccisparseramnsi.intri- COLEOCHAETE, DBKB. Flocci dichotome ramosi eati, liberi.Thecse latéralessessiles vel pedicellati. e centra radiantes, in thallum disciformem ad- BULBOCHAETE AG. Flocci dichotomeramosis- pressum sœpius coadunati, e dorso artic
RMRHN1RT–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 164 I. MAIER AND D. G. MULLER. FIGURE 9. for all species. Male gametes of Ectocarpus (left), Laminaria (center), and Fucus (right). Scale bar 20 III.5.1.3. Chemotaxis in Laminaria Low-magnification video recordings of spermatozoid movement in Laminaria digitata indicate that the attractant source is approached rather directly over distances of at least 1 mm (Figs. 8, 10; Maier, 1984). Such a response requires the cell to probe the chemical gradient and orient its axis correspondingly. It seems possible that the extremely lon
RMRDWPPG–. An introduction to the structure and reproduction of plants. Plant anatomy; Plants. ZOOSPORES 219 cilia, one directed forwards and the other backwards during movement, and these are attached to one side adjacent to the chloroplast and the prominent eye-spot (Fig, 119, g). The production of zoospores serves as a rapid means of. Fig. 119.—Ectocarpus, a, small part of a thread showing a gametangium (g.), liberating gametes ; b, tip of a branch showing hair-like termi- nations ; c, small part of a thread bearing a zoosporangium (s.) ; d, part of thread showing cell-contents and chloroplasts (ch.
RMRPX7P2–. The algae. Algae. Fig. 74 Phaeostroma bertholdt. Thallus ramifying in Scytosiphon showing sporangia (s) and a hair {h). (After Oltmanns.) minate in a typical hair. Plurilocular sporangia are produced, either in series or singly, in terminal or intercalary positions. There are numbers of these reduced forms and identification is impossible unless the reproductive organs are present. REFERENCES General Fritsch, F. E. (1945). Structure and Reproduction of the Algae^ Vol. II, pp. 49-60. Camb. Univ. Press. Ectocarpus Hamelj G. (1939). Bot. Notiser, p. 65. Knight, M. (1929). Trans. Roy. Soc. Edinb
RMRH9HED–. Botany of the Faeröes, based upon Danish investigations. Botany -- Faroe islands. 413 are precisely similar to those of the latter. For the rest I must refer to the accompanying ligure. Ectocarpus Hincksiæ occurs both in the littoral zone and in. Fig. 72. Ectocarpus Hincksiæ Harv. a, b. c and d var. irrcgularis nov. var. a, b and c different parts of the plant with plurilocular sporangia; cl cells with chromatophores. e var. tgpica. Plurilocular sporangia with involucre. n, b and c ltiO : 1 ; d and e 200 : 1. the sublittoral down to a depth of about 10 fathoms. It is most commonly found on e
RMRDAAT5–. A text-book of botany for secondary schools. Botany. 120 A TEXT-l;Oi.»K OP BOTANY of vegetation floating in mid-ocean continue to grow luxu- riantly, especially in warmer parts of the Atlantic. From the ashes of kelps and rockweeds the chief supply of iodine is obtained; and these great masses of vegetation,. Fig. 112.—Fragment of Sargassiim. shewing (iifTerentiation of the thallus into stem-like and leaf-like portions, and also the bladder-like floats.—After Bennktt and Murray, thrown up or left exposed by tlie tides, are used for enriching farm lands. 72. Ectocarpus.—The two principal grou
RMRH96GA–. Botanisk tidsskrift. Botany; Plants; Plants. — 155 — inflatus in the litoral region. Gathered with plurilocular sporangia in May —July and with unilocular sporangia in April. SW. I c el. Brimnes in Snæfellsnes, Viöey. S. I cel. Eyrarbakki, Vestmannaeyjar. Ectocarpus confervoides (Roth) Le Jol., Kuck. Ectoc. p. 19, Kjellman Handbok p. 77 p. pte. ; Rosenv. Grl. HavaJg. p. 883 p. pte. It occurs on Fucaceæ and Rhodymenia palmata in the litoral region, and on species of Larainaria and Saccorhiza dermatodea in the sublitoral region down to a depth of 5 fathoms. Gathered with plurilocular and unilo
RMREK8XY–. The classification of lower organisms. Biology. 70] The Classification of Lower Organisms. Fig. 12.—Hyphochytrialea: a-e^ Anisolpidium Ectocarpii; a-c, individuals de- veloping in cells of Ectocarpus; d, mitotic figures x 2,000; e^ cell of Ectocarpus filled by a mature individual discharging spores, f, g, Rhizidiomyccs apuphysatus; f, zoo- spore; g, oogonium of Achlya parasitized by three individuals, h, i, j^ llyphochy- trium catenoides; h, zoospore; i, young individual; j, mature individual with fila- ments, sporangia, and zoospores in various stages of development. All after Karling (1943
RMRH9HFT–. Botany of the Faeröes, based upon Danish investigations. Botany -- Faroe islands. 408 The specimens collected bore almost exelusively unilocular sporangia. These were ovate, roundish-oval, sometimes sessile, sometimes borne on quite short unicellular stalks; they sometimes sprang directly. Fig. 69. Ectocarpus spec. a, b, c, d, e and f different parts of the plant with unilocular sporangia; g and li part of the plant with plurllocular sporangia. a, b, d and g 100 : 1; c 60 : 1; e, f and h 160 : 1. from the main filament, sometimes from branchlets. Both the branchlets and the sporangia occnr a
RMRHXYP0–. Beiträge zur Kenntnis der Meeresalgen. Marine algae; Marine algae. Ectocarptis htcifvgiis Kok. Reife plurilokuläre Sporangien sind mir nichl zu Gesichl gekommen. Dagegen möchte ich die in der nebenstehenden Textfigur I wiedergegebenen Bildungen als junge plurilokuläre Sporangien ansprechen. Man könnte geneigl sein, den hier beschriebenen Ectocarpus für die imilokuläre Sporangien tragende Form von Ectocarpus tmnentosus Lyngbye zu halten, welchem Sauvageau1) neuerdings eine sorgfältige Beschreibimg gewidmet hat. Abgesehen davon, dass ich die Pflanze ein ganzes Jahr hindurch an ihrem Standort b
RMRH9HGN–. Botany of the Faeröes, based upon Danish investigations. Botany -- Faroe islands. 405 in the greater thickness of their main branches as also in the faet that, on a closer examination of the material, sporangia have oc- casionally been found which were longer in form. In fig. 67 I have. Fig. 67. Ectocarpus siliculosus (Dilhv.) Lyngb. f. arcta (Kutz.)- Different parts of the plant; compare text. a, c, d 100 : 1; b 60 : 1; e, / 160 : 1. shown some portions of a plant belonging to this form which was found in Vaagfjord growing epiphytic on Zostera marina. As mav be seen the sporangia are in the
RMRH96GF–. Botanisk tidsskrift. Botany; Plants; Plants. Pylaiella littoralis (L.) Kjellm. Ectocarpus ]., Kuck. Ectoc. p. 7; Rosenv. Grl. Havalg. p. 881 ; Pylaiella littoralis, P. varia Kjellm. Handbok p. 83. var. opposita Kjellm. Resides the typical form, which occurs everywhere along the coast, 1 have in one place, Kolfreyjustaöur in E. Icel.. met with f. rupincola Kjellm. var. firma (J. Ag.) Kjellm. is found here and there along the coasts. Resides the typical form, I think I have been able to discern f. sub- glomerata Kuck. and f. pachycarpa Kuck. var. divaricata Kjellm. has only been found in some
RMRE5945–. Cryptogamen. Fig. 256. Macrocystis pyrifera Ag. Sehr stark verkleinert. Nach Hooker und Hakvey. ungemeine Mannichfaltigkeit. Abgesehen von einigen einzelligen Formen gleichen die ein- fachsten Vertreter (z. B. die Gattung Ectocarpus) im Bau des Thallus den Confervoideen, sind unverzweigte oder verzweigte festsitzende Fäden aus einfaclien Zellreihen bestehend. Sodann giebt es Formen mit cylindrischem, reich verzweigtem vielzelligem Thallus (z. B. CladostcjjJms, dessen llauptzweige mit dichtem Filz von kurzen viel- zelligen Seitenzweigen l)edcckt sind,(Fig. 7), oder mit bandförmig abgeplattete
RMRDD830–. Botany for agricultural students . Botany. ROCKWEEDS AND GULFWEEDS (FUCALES) 321 The gametes are produced in a multicellular structure known as a gametangium, and, as in case of a sporangium, the gametan- gium may be formed from a cell within the filament or from a terminal cell on a short lateral branch. The small cubical cells composing a gametangium are packed closely together and each. Fig. 276. — Portions of two fila- ments of Ectocarpus, showing repro- duction. At s are shown spo- rangia, and between the filaments, a zoospore. At g are shown a game- tangium and a single sperm and two s
RMRHK9Y4–. Biologisches Zentralblatt. Biology. 74a Prowazek, Zur Regeneration der Algen. III. Überschreitende Regeneration. Hier können wir uns kürzer fassen, da diese Regeneration, welche Formen, die ursprünglich „nicht vorgesehen waren", schafft, nur in einigen Fällen beobachtet worden ist. Bei Ectocarpus gingen bei manchen Individuen die der Schnitt- fläche zunächst liegenden Zellen zugrunde; die nächst tiefere Zelle pro- duzierte aber zwei Zellen, von denen die eine einen meist in normaler Weise weiter wachsenden Zellfaden regenerierte, während die andere Zelle zu einem mehr rhizoidartigen Zel
RMRH9HGB–. Botany of the Faeröes, based upon Danish investigations. Botany -- Faroe islands. 406 c and d). The plant has only a few rhizoids (fig. 67, e). The main branches are about 60 n thick. Formå varians is marked by being subject to considerable variation in the form of its sporangia, and even if the Færoese. Fig. 68. Ectocarpus siliculosus (Dillw.) Lyngb. f. varians Kuck. Different parts of the plant. a, b 100 : 1; c, d, e, f 150:1; g 270 :1. specimens do not exhibit the extreme variations described by Kuckuck, 1. c., yet I feel quite justitied in referring the specimens found by me to this form
RMRHA3RE–. Botanisches Zentralblatt; referierendes Organ für das Gesamtgebiet der Botanik. Botany; Botany. 102 Kuckuck, Beiträge zur Kenntniss der Ectocarpus-Arten etc. schon vorher als Vorwölbung oder Höcker kenntlich macht. Die Entleerang geht immer an mehreren Stellen des Sporangiums vor sich. Die uniloculären Sporangien, deren Entwicklung näher studirt wurde, liegen gewöhnlich im Verlauf des vegetativen Fadens zu Ketten vereinigt; die über und unter der Kette liegenden vege- tativen Zellen verhalten sich wie beim pluriloculären Sporangium, doch finden sich sessile Ketten nur selten. Die Form des ei
RMRH82FH–. Botany of the living plant. Botany. Fig. 320. A, Pleurocladia lacustris. Uni- locular sporangium with its contents divided up into zoospores, a = eye- spot. c/tr=chromatophore. (After Klebahn.j B = Chorda filum, zoo- spores. (After Reinke.) (From Oltmanns' Algae.). Fig. 321. Ectocarpus siliculosus. i, female gamete sur- rounded by a number of male gametes. 2-5, stages in the fusion of gametes. 6, zygote after 24 hours. 7-9, fusion of the nuclei as seen in fixed and stained material. (1-5 after Berthold ; 6-9 after Oltmanns.) (From Strasburger.) in conceptacles, which are cavities hollowed ou
RMRH8D72–. Botany of the living plant. Botany; Plants. Fig. 284. A, Pleurocladia lacustris. Uni- locular sporangium with its contents divided up into zoospores, a = eye-spot. chr = chromatophore. (After Klebahn.) B= Chorda filum, zoospores. (After Reinke.) (From Oltmanns' Algae.) Fig. 285. Ectocarpus siliculosus. i, female gamete sur- rounded by a number of male gametes. 2-5, stages in the fusion of gametes. 6, zygote after 24 hours. 7-9, fusion of the nuclei as seen in fixed and stained material. (1-5 after Berthold; 6-9 after Oltmanns.) (From Strasburger.) In the simplest of the Phaeophyceae, the Ect
RMRHXYNK–. Beiträge zur Kenntnis der Meeresalgen. Marine algae; Marine algae. 38 P. Kuckuck, Beiträge zur Kenntnis der Meeresalgen. - Leptonema hiciftiyutH q. sp. Diese Art wächst an demselben Standort wie Ectocarpus lucifugus und bildet wie dieser auf den Felsen über der Wasserlinie gelbbraune, doch etwas feinwolligere und kürzere, mehr sammetartige Rasen. Sehr häufig nehmen an der Bildung der Rasen auch beide Arten glei- chen Anteil. Die aufrechten Fäden sprossen ähnlich wie bei Ectocarpus lucifugus aus einem rhizom- artig niederliegenden Teile hervor, dessen Zellen sehr kurz und gedrungen sind und z
RMRD416M–. Dansk botanisk arkiv. Plants; Plants -- Denmark. 16 Dansk Botanisk Arkiv, Bd. 2. Nr. 2. Only plurilocular sporangia were met with; their shape was rather characteristic being oval-rectangular with roundish angles (Fig. 9 a and b); a few longer, clavate sporangia with undu- lated walls were also found (Fig. 9 c, d). The loculi are large, about 8 p high and 10 p broad. The oval sporangia were about 22 p broad and 33 p long; the longer, clavate ones up to 64 p long and 27 p broad. The sporangia are mostly sessile, rarely borne on a short stalk (Fig. 9 e).. Fig. 9. Ectocarpus rhodochortonoides n
RMRJX3JA–. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. >CAULERPA XSERRULATA) GELIDIUM>SP>X K NLYNGBYAV MAJUSCULA, ENTOPHYSALIS CRUSTACEAN 1351>. ectocarpus- â¢vIcSdicu^v ':-:-ii346::-:: * .* ? * *.*.*.*.*.*.*.* r' f ? n i i i â i i l-SPHACELARIA- 1349 VFINEV;GREENA /// / /// / / / ///STRANDS, ////'//// "34S7 w$ COARSEGREEN v strAnds v 11 344W SAND -HEAD END GREY GRAVEL i i TO BlaP^^.%andy GRAVEL;!?; .-^c-h J 143b * LAGOON- END BOUND I a 11 HUMIFIED! SANDY soid. Please note that these images are extracted from scanned page images t
RMRH9NB5–. Botanisk tidsskrift. Botany; Plants; Plants. 32 Oprykning af Grenen, som den i Fig. 1 fremstillede, et saare almindeligt Fænomen, naar Grenen oprindelig udgaaer umiddelbart under Tværvæggen, men det viser sig i Al- mindelighed kun ved, at Grenen er insereret ikke blot neden- for Tværvæggen, men ogsaa for en (sædvanlig mindre) Del paa den ovenfor liggende Celle. Dette Forhold træffes meget almindeligt hos traadformede forgrenede Alger, f. Ex. Callithamnion- og Ectocarpus-Arter. Det findes endvidere gjennemgaaende hos Slægten Polysiphonia, hvor Grenene for den største Del ere insererede paa de
RMRD416H–. Dansk botanisk arkiv. Plants; Plants -- Denmark. F. Børgesen: Phæophyceæ of the Danish W. Indies. 17 6. Ectocarpus breviarticulatus J. Ag. J. Agardh, Nya alger från Mexico (Öfversigt af K. Vetensk.-Akad. Forhandl. 15. Jan., 1847, p. 7). Ectocarpus hamatus Cr. in Maze et Schramm, Essai de classification des Algues de la Guadeloupe, 2e Edit. 1870-1877, p. 111. Vickers, A., Phycologia Barbadensis, part II, pi. 29. By means of original specimens collected by Liebmann near St. Augustin in Mexico and determined by J. Agardh I have been able to see that Ectocarpus hamatus of Crouan, so well figured
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