【摘要】 以卷柏和圆枝卷柏为试材,研究其叶片在不同光照强度下(不遮光(对照CK:透光率100%)、单层遮光(透光率70%)、双层遮光(透光率50%)、三层遮光(透光率20%))的光合特性。结果表明:2种卷柏在不遮光与单层遮光条件下,净光合速率高于其它2种处理;卷柏净光合速率日变化为双峰曲线,具有明显的午休现象,而圆枝卷柏的午休现象不明显。从午休恢复程度看,卷柏对光照的适应性要广于圆枝卷柏。叶片叶绿素总含量及比叶质量的变化进一步证明了此论点。更多还原

【Abstract】 Taking Selaginella tamariscina and Selaginella sanguinolenta as experimental materials,the photosynthetic characteristics of the leaves under different light intensity(no shading(control CK:light transmittance 100%),single shading(light transmittance 70%),double shading(light transmittance 50%),three layer of shading(light transmittance 20%)) were studied.The results showed that the 2 species of Selaginella in no shading and single shading conditions,net photosynthetic rate was higher than the other two treatment of Selaginella;Selaginella tamariscina diurnal variation of net photosynthetic rate curve for Shuangfeng,had obvious midday depression,but Selaginella sanguinolenta midday depression was not obvious.The degree of recovery from midday depression,Selaginella tamariscina illumination adaptability was wider than Selaginella sanguinolenta.Chlorophyll content and specific leaf weight changed further proved the point.更多还原