四种热带雨林树种幼苗比叶重,光合特性和暗呼吸对生长光环境的适应

被引：166

作者：

冯玉龙

曹坤芳

冯志立

马玲

机构：

[1] 中国科学院西双版纳热带植物园昆明分部

[2] 东北林业大学森林资源与环境学院

来源：

生态学报 | 2002年 / 06期

关键词：

光适应; 可塑性; 比叶重; 光合特性; 呼吸速率; 热带雨林树种;

D O I：

暂无

中图分类号：

S718.5 [森林生态学];

学科分类号：

摘要：

雾凉季研究了西双版纳热带雨林 4种植物幼苗对生长光环境的适应 ,其中两个树种幼苗喜光 (团花树和滇南插柚紫 ) ,两个树种幼苗耐荫 (滇南红厚壳和玉蕊 )。发现弱光环境中生长的 4种植物比叶重、光合能力、光饱和点、光补偿点、暗呼吸速率、叶绿素 a/b比较低 ,叶绿素含量较高。玉蕊和滇南红厚壳幼苗的光合能力和呼吸速率低于团花树和滇南插柚紫。团花树和滇南插柚紫的比叶重和光合作用的可塑性大于玉蕊和滇南红厚壳。高光强下生长的团花树和滇南插柚紫增加叶氮分配给羧化酶的比例 ,减少分配给叶绿素的比例。滇南红厚壳和玉蕊适应弱光环境的能力略强于团花树和滇南插柚紫 ,但适应强光的能力较差。研究结果支持树种的生理生态特性决定了其演替状况和生境选择的假说。单位干重叶的光合能力和呼吸速率并未表现出利于光适应的可塑性 ,表明 4种植物生理适应能力较差。形态学上的适应在 4种热带雨林树种幼苗光适应方面起到了重要的作用 ,叶氮分配也是它们光适应的策略之一

引用

页码：901 / 910

页数：10

共 29 条

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