喀斯特森林植物叶片显微结构的数量特征  

Comparation of quantivative characteristics of leaf microscopic structure between calcicoles and calcifuges in karst area

作　　者：张习敏[1] 宋庆发[1] 刘伦衔[1] 乙引[1] 

机构地区：[1]贵州师范大学生命科学学院/贵州省植物生理与发育调控重点实验室,贵州贵阳550001

出　　处：《广东农业科学》2013年第11期35-37,共3页Guangdong Agricultural Sciences

基　　金：长江学者和创新团队发展计划(PCSIRT);国家自然科学基金(30460031);贵州省重点实验室建设项目(黔科合计Z字[2011]4005号);贵州省科技厅与贵州师范大学联合基金(黔科合计J字[2012]20号)

摘　　要：测定了喜钙、兼性和嫌钙7种乔木植物的19个叶片解剖结构指标。经主成分分析发现,叶片解剖结构特征可有效区别喜钙植物、兼性植物和嫌钙植物。喜钙植物不具有蜡质层和角质层,在叶片厚度、栅栏组织厚度、中脉厚度、上下表皮厚度、细胞总层数、栅栏细胞层数、海绵细胞层数、栅栏细胞高度、最大导管直径等方面均小于嫌钙植物,而兼性植物介于喜钙植物和嫌钙植物之间,变化幅度较大。此外,短期外源Ca2+处理并不能显著改变喜钙植物叶片解剖特征,进一步证实喜钙植物叶片解剖结构特征是其长期适应钙生环境的必然结果。19 microscopic structure characteristics of leaves from 7 arbor species was studied in this paper. The results showed that calcicole, amphoterie and calcifuge were easily distinguished from main composition analysis by the microscopic structure characteristics. Calcicole lacked waxy layer and corneous layer, and had lower value than calcifuge in several parameters, such as thicknesses of leaf, palisade tissue, central vein, upper and lower epidermis, total layers of cell, layers of padisade, spongy cell, height of padisade cell and maximum vessel diameter. Amphoteric plants had parameter value above between calcicole and calcifuge. Moreover, external Ca2 could not remarkably change the parameter values of calcifuge. It was deduced that the microscopic structure characteristics of leaves in calcicole is the result of its long-term adaptation to calcicolous environment.

关 键 词：喜钙植物 嫌钙植物 叶片 解剖结构 喀斯特 

分 类 号：Q944.5[生物学—植物学]