干旱胁迫对玉米品种苗期叶片光合特性的影响

张兴华, 高杰, 杜伟莉, 张仁和^*, 薛吉全

Effects of Drought Stress on Photosynthetic Characteristics of Maize Hybrids at Seedling Stage

ZHANG Xing-Hua, GAO Jie, DU Wei-Li, ZHANG Ren-He^*, XUE Ji-Quan

图4 干旱胁迫对玉米陕单609和郑单958叶片单位PSII反应中心活性的6个参数的影响各个参数为PSII最大光化学效率 F v F m 、单位反应中心吸收的电子流ABSRC、用于电子传递的量子产额ET 0 ABS、PSI末端受体还原的量子产额RE 0 ABS、捕获的激子将电子传递到电子传递链中Q A - 下游的其他电子受体的概率 Ψ o 、以吸收光能为基础的性能指数PI ABS 。图注上不同小写字母表示处理间在0.05水平上差异显著。CK: 正常供水; LS: 轻度干旱; MS: 中度干旱; SS: 重度干旱。
Fig. 4 Effects of drought stress on six fluorescence parameters in dark-adapted leaves of Shaandan 609 and Zhengdan 958 FvFm: maximum quantum yield of primary photochemistry, ABSRC: the specific energy fluxes per RC for absorption; ET0ABS: quantum yield for electron transport, RE0ABS: quantum yield for the reduction of end acceptors of PSI per photon absorbed; Ψo: the efficiency with which a trapped exciton can transfer an electron into the down stream electron transport chain further than QA-; PIABS: the performance index on an absorption basis. Different letters above columns indicate significant differences between treatments P < 0.05 and determined by Tukey’s test. CK: control, LS: low drought stress, MS: moderate drought stress, SS: severe drought stress.