摘要
通过对滇中亚热带半湿润常绿阔叶林８２个主要优势种和常见种进行叶结构分析研究，结果表明这些主要组成树种虽亲缘关系相互较远，但在相同的生态环境条件下叶结构却表现出了相似和相同的特点。主要为：群落中以单叶为主，边缘具齿较全缘为多，缺长渐尖叶，有毛叶和无毛叶所占的比例近于相等；叶脉主要为环结曲行羽状脉，大部分二级脉结环，被三、四级脉环所包围，夹角为锐角且变异多近一致；三级脉多为结网型；网眼发育完善较不完善为多，盲脉多分枝；大部分无包藏脉。并且讨论了其中一些特征如毛被，网眼，包藏脉和边缘脉等可能的生态学意义。该类森林群落主要树种的叶形态结构特征除了是物种自身系统进化的原因外，还是植物长期适应滇中高原偏干旱的季风气候的表现。
in the paper, the archinecture of leaves and their possible ecological significance of 82 dominant and common species from the semi-humid forest occurring in C. Yunnan were studied. The characters of 82 species were presented as follows: most species are with simple leaves, in which the serrate types are a little more than intergrifolius and the glabrous types are a little equal to trichomes, venation pinnate, secondary veins brochidodromous often with ascending arches and joining super adjacent secondary and enclosed by 3 or 4 arches. The angles between main vein and secondary veins are acute, and the divergence of the angles is often nearly uniform; Tertiary veins most are reticulate. The areoles often develope perfectly and embedded veins almost are inconspicuous or absent. Furthermore, some characters such as trichomes, areoles, embedded veins and marginal ultimate venation etc. and their possible ecological significance were disscussed. These characters should be the results that these species adapt to the ecosystem of semi-evergreen broadleaved forest and the monsoon climate of C. Yunnan Plateau besides the phylogeny themselves.
出处
《云南植物研究》
CAS
CSCD
1998年第1期49-57,共9页
Acta Botanica Yunnanica
基金
云南省自然科学基金
关键词
半湿润
常绿阔叶林
叶结构
生态学
Semi-humid evergreen broad-leaved forest, Leaf architecture, Ecological significance
