【摘要】 研究结果表明,增强的紫外线-B(UV-B,280～320nm)辐射会导致水稻植株矮化4.71％～16.59％、叶面积变小、干物质生产量减少11.79％～60.57％。究其原因主要是叶片光合作用色素叶绿素a、叶绿素b和类胡萝卜素含量的降低和叶绿素a荧光动力学参数的改变,光合系统Ⅱ受到破坏,光合作用能力下降、生长发育受阻。更多还原

【Abstract】 Enhanced UV-B radiation would shorten plant height by 4.71%- 16.59% .decrease leaf area and reduce dry matter of rice seedlings by 11.79% ~60. 57% , which is attributed to content decrease of chlorophyll-a,chlorophyll-b and carotenoid,parameter change of chlorophyll-a fluorescence, photosystem Ⅱ (PS Ⅱ) damage, photosynthesis decrease and retard growth and development of rice plant.更多还原