农业环境科学学报2011，Vol.30Issue(8)：1489-1499,11.
太阳辐射减弱对冬小麦灌浆期叶绿素荧光及气体交换的影响
Effects of Reduced Solar Radiation on Chlorophyll Fluorescence Parameters and Gas Exchange in Winter Wheat of Grain Filling Periods
摘要
Abstract
In the recent years, global dimming of solar irradiance is growing due to the increase of aerosols, air pollutants and population density. In order to elucidate the effects of reduced solar irradiance on chlorophyll fluorescence parameters and gas exchange of winter wheat cultivar, we conducted a field experiment in Nanjing city by using the Triticum aestivum L. (cv.Yang mai 13) as the experimental plants. Five reduced solar radiation treatments were set up in the experiments, including 15%(T4), 20%(T3), 40%(T2), 60%(T1 )and 100%(CK)of natural solar radiation, while using Diving-PAM chlorophyll fluorometer and Lcpro+ photosynthesis to measured at different grain filling stages of crop chlorophyll fluorescence and gas exchange of the dynamic changes. The results showed that reducing solar radiation significantly increased chlorophyll and lutein content of winter wheat in the grain filling stage, but the Chla/Chlb and photosynthetic rate( Pn) continued to decrease. Fv/Fm, qP, Y( NO), ( 1 -qP)INPQ and the actual photochemical efficiency(Yield) increased with solar radiation intensity decreased, and show a downward trend, but NPQ, Y (NPQ) and L (PFD) rised. Visible, less solar radiationis cut in winter wheat leaves, when the primary photochemical reaction of PS II electron transfers efficiency met the energy shortage of stress( a decline in photochemical quenching qP). Meanwhile, reducing the electronic delivery of the body (PQ) activity (quantum efficiency Yield was lower), was to increase the heat dissipation leaves, resulting in reduced photosynthetic capacity.关键词
太阳辐射减弱/冬小麦/光合作用/叶绿素荧光/光系统Ⅱ/气体交换Key words
reduced solar radiation/ winter wheat/ photosynthetic/ chlorophyll fluorescence/ PS Ⅱ/ gas exchange分类
资源环境引用本文复制引用
郑有飞,倪艳利,麦博儒,冯妍,孙健,李健,徐静馨..太阳辐射减弱对冬小麦灌浆期叶绿素荧光及气体交换的影响[J].农业环境科学学报,2011,30(8):1489-1499,11.基金项目
国家自然科学基金项目(41075114) （41075114）
江苏省高校自然科学研究重大项目(09KJA170 004) （09KJA170 004）
江苏省普通高校研究生科研创新计划项目(CX10B_291z) （CX10B_291z）
