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CAS Workshop on Ecosystem Succession Theory and Practice of Ecological Restoration 不同生境野牡丹(Melastoma candidum )叶的生态解剖特征与生理生态特性的研究 刘惠
赵平
蔡锡安
曾小平 （中国科学院华南植物所，广州 510650） 摘要： 通过对不同生境中野牡丹叶的生态解剖特征与生理生态特性的研究表明：山地野牡丹和沼生野牡丹在形态结构方面存在着明显的不同，山地野牡丹叶的上表皮细胞小而排列紧密，气孔密度较小，栅栏组织厚，栅栏细胞高，而沼生野牡丹的整个叶片比较厚，最大导管直径也较大。同时，两者在叶绿素含量、光合作用、蒸腾作用、气孔导度、水分利用效率等方面也表现出明显的差异。综合分析其生境，土壤条件是引起两种生境生长野牡丹叶片解剖结构差异的主导因子。本研究的实验结果，可以为野牡丹生态型的划分提供了形态结构和生理生态方面的依据。 关键词：野牡丹(Melastoma candidum )；生态型；生态解剖特征；生理生态特性 A study
on eco-anatomical features and ecophysiological characteristics of
leaf of Melastoma candidum in
different habitats Liu
Hui Zhao Ping Cai Xi’an Zeng
Xiaoping (South China Institute of Botany, Chinese Academy of Science, Guanzhou 510650, China) Abstract: The experiment was carried out to study the eco-anatomical features and ecophysiological characteristics of leaf of Melastoma candidum growing in different habitats. The results were as following: the leaf eco-anatomical features were significantly different between hilly Melastoma candidum and poachy Melastoma candidum. Upper epidermis cells in leaf of hilly Melastoma candidum were smaller, stomatal density was lower; its palisade was thicker, and its cell height was longer, but leaf thickness and maximum vessel diameter were thinner or smaller respectively. At the same time, they were also significantly different in chlorophyll content, photosynthesis, transpiration, stomatal conductance, and in water use efficiency. Studies showed that these differences between the two ecotypical M. candidum were mainly caused by soil conditions and the results would give some morphological structure and ecophysiological evidences for distinguishing the two ecotypes for Melastoma candidum in different habitats. Key words: Melastoma candidum; ecotype; eco-anatomical features; ecophysiological characteristics
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