Alyssum nezaketiae is a local endemic species in gypsum habitats of Çankırı province in Turkey. In this study, I used field collected specimens of A. nezaketiae in a scanning electron microscopy examination of vegetative and reproductive structures of A. nezaketiae. The objective of the study was to investigate the micromorphological properties that define the species and that represent its adaptation(s) to the extreme environmental conditions posed by gypsum habitats. The epidermis had one to two rows at transverse sections of leaf and stem. Cortex was composed six to eight rows parenchyma cells at stem. A number of adaptations to xeric habitats were observed, including: dense silvery lepidote hairs on leaves and stems, small leaves, stomata on the lower surfaces of the leaves occurring in stomatal crypts, intense lignification in the central cylinder of the stems, and bundles of sclerenchyma in the pith region of stems. These can be interpreted as gypsophytic characteristics associated with physiological drought. Micromorphological properties of plant parts are discussed in relation to environmental conditions and possible constraint factors occurring in these gypsum habitats. Furthermore, these micromorphological studies contribute important taxonomic characters that are needed to help identify a species whose habitat is under threat from a variety of human activities.

中文翻译：

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Alyssum nezaketiae Aytaç & H. Duman（十字花科）的微形态学考虑，土耳其石膏栖息地特有：电子显微镜研究

Alyssum nezketiae是土耳其Çankırı 省石膏栖息地的地方特有物种。在这项研究中，我使用了现场采集的A标本。nezketiae在A的营养和生殖结构的扫描电子显微镜检查中。鼻息肉. 该研究的目的是调查定义该物种并代表其对石膏栖息地构成的极端环境条件的适应的微形态学特性。表皮在叶和茎的横切面上有一到两行。皮层由六至八行的干实质细胞组成。观察到许多对干旱栖息地的适应，包括：叶和茎上的密集银色鳞片毛、小叶、叶下表面的气孔出现在气孔隐窝中、茎的中央圆柱体中的强烈木质化，以及成束的茎髓区的厚壁组织。这些可以解释为与生理干旱相关的石膏特征。植物部分的微形态特性与环境条件和这些石膏栖息地中发生的可能限制因素有关。此外，这些微形态学研究有助于识别栖息地受到各种人类活动威胁的物种所需的重要分类特征。