【摘要】 对滇东南、滇中以及滇西北地区的10个云南松种群及其近缘种的芽进行了比较形态解剖学研究,云南松种群及其近缘种芽的形态和结构特征表现为多态性,随着纬度或海拔(样带取样)的增加,从滇东南-滇中-滇西北,芽鳞长度和芽鳞排列的紧密程度等随着海拔高度的升高有增加的趋势。针叶的发育为"不对称"叶原基分化,形成不同针叶数的针束。云南松及其近缘种芽形态结构的多样性是生态环境的复杂性与生态因子组合的多样性共同作用的结果。更多还原

【Abstract】 Shoot apex morphology and structure characteristics of Pinus yunnanensis and its closely related species,sampled from the south-east,mid-part and north-west of Yunnan Plateau,were extensively investigated,observed and analyzed. The shoot apex morphological characteristics of P.yunnanensis and its closely related species presented polymorphism in Yunnan plateau. The length and arrangement tightness of bud scales increased with the altitude heightening. The"anisomerous"needle primordia differentiated the different needle leaves per needle bundle. The morphological and structural polymorphism of P.yunnanensis. and its closely related species was the joint action of ecological environment complexity and ecological factor combination diversity.更多还原