华南农业大学学报Issue(2)：61-68,8.
基于叶片解剖结构对青藏高原25种灌木的抗旱性评价
Drought resistance evaluation based on leaf anatomical structures of 25 shrubs on the Tibetan Plateau
摘要
Abstract
Objective]This study reported the leaf anatomical structure , stomatal characteristics , and the response mechanism of water adaptability of 25 shrubs on Tibetan Plateau , with an aim to provide a refer-ence beneficial to afforestation and selection of drought-resistant plants on the Tibetan Plateau and an at-tempt to outline how to screen excellent drought-resistant plants .[Method]Conventional paraffin section technique was used to make comparison with 12 indexes such as the thickness of leaf cuticle , upper epi-dermis , lower epidermis , palisade tissue , spongy tissue , and leaf thickness .The principal component a-nalysis and subordinate function were used to develop a system to analyze and evaluate the plant drought resistance .[Result and conclusion]The result showed that the leaves of all the 25 shrubs had typical xer-omorphic structures, and the maximum leaf thickness was up to 323.00 μm, 186.25 μm on average, and the maximum epidermal layer thickness was up to 4.83 μm, with an average of 1.71 μm, which presented that upper epidermis was 30 .00%thicker than lower epidermis averagely , proving that the leaf stomata were small and dense as the result of long-term adaptive evolution in a drought plateau environ-ment.Moreover,12 indicator species differed from each other significantly .The five representative drought resistance indexes , including stomatal density , leaf thickness , palisade tissue thickness , spongy tissue thickness and stratum corneum thickness had been screened through a principal component analysis com -bined with the variation coefficient of each index .By using the method of subordinate function values , this study provides a sketch of content on sorting drought performance into different levels , including highly drought-resistant species , drought-tolerant species , drought-resistant in general species , and drought-sensitive species .关键词
灌木/叶片解剖结构/气孔特征/抗旱性/干旱胁迫/青藏高原Key words
shrub/leaf anatomical structure/stomatal characteristic/drought resistance/drought stress/Tibetan Plateau分类
农业科技引用本文复制引用
潘昕,邱权,李吉跃,王军辉,何茜,苏艳,马建伟,杜坤..基于叶片解剖结构对青藏高原25种灌木的抗旱性评价[J].华南农业大学学报,2015,(2):61-68,8.基金项目
林业公益性行业科研专项（200904033）；科学技术部农业科技成果转化资金项目 （）
