24种国产金发藓科植物叶中肋细胞离析后形态学比较观察

The Observation of Morphology on Costa of 24 Species of Polytrichaceae after Separating in China

利用强酸解离的方法对24种国产金发藓科植物的叶中肋细胞形态进行了比较观察研究。分别测量了离析后叶中肋细胞的长度、宽度和细胞壁厚度及纹孔场数目。细胞的形态特征在异蒴藓属(Lyellia)的各种种内变异程度相对小,而在金发藓属(Polytrichum)、小金发藓属(Pogonatum)和小赤藓属(Oligotrichum)等属中种内变异程度相对较大。细胞纹孔场数目较多,干燥时出现规律性卷缩,可能更适宜干燥生境。

Morphology of the leaf costa of 24 Polytrichaceae in China were studied by measuring with strong acid. The length and width of cells, the thickness of cell walls and numbers of pit fields of the leaf costa were measured. The results showed that variations of the cell structure of LyeUia is lower, while the variations of genus of Polytrichum, Pogonatum and Oligotrichum are higher among different species of genus Lyellia, Polytrichastrum, Pogonatum and Polytrichum can adapted the drought environment more easily than Microdendron, Oligotrichum ,Atrichum according to the numbers of pit field of cells.