摘要
研究了CO2升高对小叶章光合色素含量及相应光合参数的影响。实地条件下测定了净光合速率(PN)对光合有效辐射(PAR)的响应曲线,根据非直角双曲线模型,推算最大净光合速率(Amax)、暗呼吸速率(Rd)以及表观量子产量(AQE)等。结果表明CO2升高增加了小叶章叶片光合色素含量,但却降低了光合参数Amax、Rd以及AQE。光合色素含量和光合参数呈现不同的变化趋势。
A field experiment was carded out with treatments different C02 concentration to investigate effects on and photosyn- thetic pigments content and photosynthetic parameters. The response curves of net photosynthetic rate （Pn） versus photosyn- thetically active radiation （PAR） was measured in situ. This response curve was then analysed using non-rectangular hyperbol- ic photosynthetic model, which calculated apparent quantum yield （AQE）, dark respiration rate （IRa） and light-saturatod photosynthet- ic rate （A）. The results showed that elevated C02 significantly increased photosynthetic pigment content but decreased Am, P and A0E of leaves.
出处
《国土与自然资源研究》
2013年第1期82-83,共2页
Territory & Natural Resources Study
基金
国家自然科学基金(30970452
31170462)
黑龙江杰出青年基金(JC03-09)
关键词
CO2浓度升高
小叶章
光合色素
光合参数
elevated CO,.
Calamagrostis angustifolia
photosyn-thetic pigments
photosynthetic parameters
