CAJ | 학술논문

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.
연구료CO2승고대소협장광합색소함량급상응광합삼수적영향.실지조건하측정료정광합속솔(PN)대광합유효복사(PAR)적향응곡선,근거비직각쌍곡선모형,추산최대정광합속솔(Amax)、암호흡속솔(Rd)이급표관양자산량(AQE)등.결과표명CO2승고증가료소협장협편광합색소함량,단각강저료광합삼수Amax、Rd이급AQE.광합색소함량화광합삼수정현불동적변화추세.
A field experiment was carried out with treatments different CO2 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 (Rd) and light-saturated photosynthet-ic rate (Amax). The results showed that elevated CO2 significantly increased photosynthetic pigment content but decreased Amax, Rd and AQE of leaves.