不同光照强度对三种藤本植物光合作用的影响
关键词： 藤本植物；光合作用；光合速率；光照强度；光响应曲线
Effects of different light intensity on plant photosynthesis of three species of lianas
Abstract：The light curve of three kinds of lianas were measured by CI-340 portable photosynthesis system to study photosynthetic characteristic under different light intensities in Shanghai Institute of Technology. There are Vinca major Linn., Morden cvs.of Chlimbers and Ramblers, Clematis paniculate. The response of net photosynthetic rate versus photosynthetically active radiation were measured in situ. Pn of the 3 lianas species were analyzed comparatively. And chlorophyll content, Leaf Nitrogen Concentration, soluble sugar content were investigated. The result showed that there are significant differences in light response of photosynthesis among them. Particularly, the Pn was mainly affected by the light intensity. The net photosynthetic rate (Pn) and transpiration rate(Tr)of the three lianas species appeared as single-peak curves, increased at the beginning then decreased following the PAR. Three of all the tested species, Morden cvs.of Chlimbers and Ramblers possessed the highest Pn under the same condition.
Key words: lianas; leaf photosynthesis; photosynthetic rate; light intensities light-response curve;
目录
1 综述1
2 材料与方法2
2.1 试验设计及供试材料2
2.2 试验仪器及器具3
2.3 实验试剂3
2.4 测定项目及方法3
2.4.1 净光合速率对光合有效辐射响应的测定3
2.4.2 可溶性总糖和淀粉含量测定3
2.4.3 叶绿素含量测定5
2.4.4 叶片全氮含量测定5
2.5 统计分析5
3 结果与分析6
3.1 三种藤本植物光合速率对光合有效辐射的响应6
3.2 最大净光合速率8
3.3 光补偿点、光饱和点8
3.4 叶片Tr、WUE对光合有效辐射的响应9
3.5 光合生理指标11
3.5.1 叶绿素含量11
3.5.2 可溶性总糖、淀粉含量11
3.5.3 叶片全氮含量12
4 讨论13
5 结论15
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