研究了CO_2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,CO_2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...研究了CO_2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,CO_2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CO_2浓度倍增的响应不同,表明CO_2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。展开更多
ATMOSPHERIC CO<sub>2</sub> concentration is predicted to increase to 700μL/L by the middle of the 21st century. The impacts of raising CO<sub>2</sub> on vegetation and ecosystem have been inte...ATMOSPHERIC CO<sub>2</sub> concentration is predicted to increase to 700μL/L by the middle of the 21st century. The impacts of raising CO<sub>2</sub> on vegetation and ecosystem have been intensively studied. It is well known that C<sub>3</sub> species and C<sub>4</sub> species responded much differently to double CO<sub>2</sub>. Potential enhancement of photosynthesis efficiency induced by double CO<sub>2</sub> in C<sub>3</sub> plants was almost 66%, but in C<sub>4</sub> plants only 4%. The response to double CO<sub>2</sub> in C<sub>3</sub> species might展开更多
文摘研究了CO_2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,CO_2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CO_2浓度倍增的响应不同,表明CO_2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。
文摘ATMOSPHERIC CO<sub>2</sub> concentration is predicted to increase to 700μL/L by the middle of the 21st century. The impacts of raising CO<sub>2</sub> on vegetation and ecosystem have been intensively studied. It is well known that C<sub>3</sub> species and C<sub>4</sub> species responded much differently to double CO<sub>2</sub>. Potential enhancement of photosynthesis efficiency induced by double CO<sub>2</sub> in C<sub>3</sub> plants was almost 66%, but in C<sub>4</sub> plants only 4%. The response to double CO<sub>2</sub> in C<sub>3</sub> species might
