【摘要】 对生长在相同透光率和不同光质下的人参(Panax ginseng)叶片叶绿体超微结构及光合生理性状进行了研究。人参叶片叶绿体的类囊体膜较为发达,基粒和基粒片层数以绿膜下的较多,紫膜下的次之,红膜和蓝膜下的较少。单位叶面积内的叶绿素含量以紫膜和绿膜下的较高,红膜和蓝膜下的较低。叶绿素和叶片在可见光区的吸收光谱面积均以紫膜和绿膜下的较大,红膜和蓝膜下的较小。人参叶片的光合速率较低,在4种滤光膜下的顺序为紫膜>绿膜>红膜>蓝膜。绿膜能够促进人参叶片的叶绿素合成和类囊体膜的发育;红膜利于叶绿素b的合成;蓝膜下叶绿体基粒片层垛叠程度较差,光合速率也较低。而紫膜下人参叶绿体结构和各项光合生理性状均具优势。更多还原

【Abstract】 The ultrastructure of chloroplasts and the photosynthetic physiological properties of panax ginseng C. A. Mey. grown under different light qualities with same light transmission rate (25% of sun light) were investigated. The results showed that the thylakoid membranes of Panax ginseng chloroplasts are well deve lopted,and the number of grana and granal lame llae under green and violet film are more than that under red and blue film. The content of chlorophyll in the same area of leaves and the absorption spectra area of chlorophylls and leaves under violet and green film are higher than those under other films. All the photosynthetic rates are very low, and their sequence from high to low are violet, green, red and blue . Green film is advantageous to the a- ccumulation of chlorophylls and the development of thylakoid membranes and red film is advantageous to the accumulation of chlorophyll b. Blue film reduced granal thylakoid staking and decreased the photosynthetic rate. A superior trend of the photosynthetic physiologic properties as well as the structure of chloropiasts of Panax ginseng leaves under violet film, being composed with red and blue film is significant.更多还原