摘要
以白云鄂博稀土矿区不同生境下常见的8种藓类(缨齿藓、尖叶对齿藓、真藓、短叶对齿藓、中华赤藓、黑对齿藓、闭蒴盐土藓、卷叶墙藓)为实验材料,以内蒙古贺兰山、桑根达来的同种植物标本为对照材料,利用体式显微镜和光学显微镜,对苔藓植物体的分枝状况和茎叶的解剖结构特征进行观察比较,探讨稀土元素对苔藓植物生长的影响。结果表明:(1)两地8种藓类植物在株高、茎宽、叶长和叶宽4个指标方面几乎都存在显著差异,而叶的长宽比和叶细胞(上部、中部、基部)长宽比差异不显著。(2)白云鄂博3个不同矿区的3种藓类植物在叶长和叶宽方面都是西矿>主矿>东矿,且西矿与东矿间差异显著;3个不同矿区植物的茎宽没有规律。(3)稀土元素含量是影响不同矿区苔藓植物生长的主要因素,并可能通过叶片影响植物体的生长。
Selecting different habitats eight mosses as the experimental materials in Baiyun Obo rare earth mine, respectively Jaffueliobryum wrightii （Sull.） Ther., Didymodon constrictus （Broth.） Saito, Bryum argenteum Hedw, Didymodon tectorum （C.Muell.）Saito, Syntrichia sinensis （C.Müll.） Ochyra, Didymodon nigrescens（Mitt.） Saito, Pterygoneurum kozlovii Lazarenko and Tortula atrovirens （Smith） Lindb. With the same species from Helan Mountain and Sanggendalai as control, we compared the plant branching and stem leaf morphological and anatomical characteristics with the microscopics to explore the effect of rare earth elements on the growths of bryophytes. The results showed that： （1） the differences between two regions were significant in four index： plant height, stem width, leaf length and leaf width. But non significant in leaf length width ratio and leaf cell length width ratio. （2） Three mine area mosses in leaf length and leaf width indicated same results： West mine〉Main mine〉East mine, the difference was significant between West mine and East mine; and the stem width irregular in three mine areas. （3） The main factor to the mosses growth was the rare earth element contents and influenced mainly through the leaf.
出处
《西北植物学报》
CAS
CSCD
北大核心
2017年第1期23-31,共9页
Acta Botanica Boreali-Occidentalia Sinica
基金
国家自然科学基金(31360142)
内蒙古大学高层次人才引进项目
