【摘要】 研究了CO₂浓度倍增对谷子（Setaria italica （L.）Beauv.）叶片单位鲜重和单位叶面积叶绿素（Chl）和类胡萝卜素（Car）的含量以及PSⅡ功能的影响。结果表明,CO₂浓度倍增能提高拔节期成熟叶片和灌浆期成熟旗叶的Chl和Car的含量,并且能提高这两种叶片PSⅡ反应中心开放部分的比例。然而拔节期叶片和灌浆期旗叶的qN值和PSⅡ总的光化学量子产量,以及 F_v/F_o、F_v/F_m和F_d/F_s的值对CO₂浓度倍增的响应不同,表明CO₂浓度倍增对拔节期叶片光合功能的改善优于灌浆期的旗叶。更多还原

【Abstract】 Effects of doubled CO2 on the contents of chlorophyll and carotenoid per unit fresh weight and per unit area of leaves and PS II functions of Setaria italica (L.) Beauv. were studied. The experimental results showed that the contents of chlorophyll and carotenoid, the proportion of opened PS II reaction center from the mature leaves at jointing stage and the mature flag leaves at grouting stage were raised with CO2 enrichment. However, qN value and the overall photochemical quantum yield of PS II , as well as the FV/FO, Fv/Fm and Fd/Fs in the above-mentioned leaves both at the jointing and grouting stage in response to doubled CO2 were different. The final outcome showed that the photosynthetic functions from the leaves at jointing stage improved by doubled CO2 were better than those from the flag leaves at grouting stage.更多还原