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《Journal of Anhui Agricultural Sciences》 2009-01
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Study on Species Diversity and Adaptation of Mosses in Biological Crust in Gurbantunggut Desert

ZHENG Yun-pu et al (College of Life Science,Hebei Normal University,Shijiazhuang,Hebei 050016)  
[Objective] The purpose of research was to discuss species diversity of mosses in biological crust and adaptation mechanism to desert environment.[Method] The species diversity and adaptation of mosses in biological soil crusts in Gurbantunggut desert were analyzed.[Result] The results showed that there were 6 species belonging to 3 genera and 2 families of mosses in Gurbantunggut desert.Tortula desertorum was dominant specie in this area.The leaves of Tortula desertorum were revolute seriously,and had long awns consisting of two layer cells with tiny transparent lycotropal tubercles.Meanwhile,the cortex of stem of Tortula desertorum had the obvious sclerenchyma.In addition,the leaves of Crossidium squamiferum incurved into packet-shape and had ventral photosynthetic filaments.The leaf external cortex of Bryum argenteum was thick while the wall of internal cortex cells was thin and the cell wall of central strand was only incrassation in the corner.The leaves of B.bicolor crowd at stem tips and the cells of external cortex were obvious incrassation while the internal cortex cells were little incrassation.Additionally,the central strand was not distinct.The leaves of Tortula muralis and T.muralils var.aestiva had densely papillose-verruculose on both surfaces and multi-layered thickened-wall cells.In a word,with varied morphological structures,mosses had adapted the disadvantageous factors,such as water shortage,strong radiation in the aid ecological conditions.[Conclusion] This research has far-reaching vegetation in Gurbantunggut desert.
【Fund】: 国家自然科学基金(No.30670152);; 河北省自然科学基金(No.C2008000158);; 中国科学院知识创新工程重要方向项目(KZCX3-SW-343);; 中国科学院研究生科学与社会实践资助项目(古尔班通古特沙漠藻类分布规律调查)
【CateGory Index】: Q948
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