赵丽英, 邓西平, 山仑. 不同水分处理下冬小麦旗叶叶绿素荧光参数的变化研究[J]. 中国生态农业学报(中英文), 2007, 15(1): 63-66.
引用本文: 赵丽英, 邓西平, 山仑. 不同水分处理下冬小麦旗叶叶绿素荧光参数的变化研究[J]. 中国生态农业学报(中英文), 2007, 15(1): 63-66.
ZHAO Li-Ying, DENG Xi-Ping, SHAN Lun. Effects of altered water condition on some chlorophyll fluorescence parameters of flag leaves of winter wheat[J]. Chinese Journal of Eco-Agriculture, 2007, 15(1): 63-66.
Citation: ZHAO Li-Ying, DENG Xi-Ping, SHAN Lun. Effects of altered water condition on some chlorophyll fluorescence parameters of flag leaves of winter wheat[J]. Chinese Journal of Eco-Agriculture, 2007, 15(1): 63-66.

不同水分处理下冬小麦旗叶叶绿素荧光参数的变化研究

Effects of altered water condition on some chlorophyll fluorescence parameters of flag leaves of winter wheat

  • 摘要: 用叶绿素荧光诱导动力学技术研究了变水条件对冬小麦旗叶叶绿素荧光参数:初始荧光(Fo)、最大荧光(Fm)、光系统Ⅱ(PSⅡ)的原初光能转化效率(Fv/Fm)和潜在活性(Fv/Fo)以及qP和qNP等的影响。结果表明,干旱胁迫使Fo和qNP值增加,Fv、Fm、Fv/Fm、Fv/Fo、qP、ETR值降低,但在拔节期和灌浆期干旱或复水处理下与干旱处理结果相反,这说明干旱可引起PSⅡ反应中心的破坏,而不同生育期的干湿交替环境条件可以增加PSⅡ反应中心开放部分的比例,将更多的

     

    Abstract: Modulated chlorophyll fluorescence induction kinetics was used to investigate the effects of altered water conditions on the photosynthetic functions of flag leaves of different winter wheat varieties. The photosynthetic functions include many chlorophyll luorescence parameters such as minimal fluorescence(Fo), maximal fluorescence (Fm) and the ratio of the variable fluorescence to maximal fluorescence Fv/Fm, the potential activities of PSⅡ(Fv/Fo),photochemical quenching (qP) and non-photochemical quenching (qNP). The results show that Fo and qNP increase, but Fv, Fm, Fv/Fm,Fv/Fo, qP, ETR reduce under the water stress. However, the result is contrary under the altered water onditions.It indicates that PS Ⅱ reaction center is destroyed by drought stress. When water is supplied at the jointing stage and grain-filling stage, or drought is supplied at two stages but water is supplied at other stages, qP is increased being helpful to enhance the open ratio of PS Ⅱ reaction center and making more photosynthetic energy to be used in the photosynthetic electron transport in order to improve the electron transport capacity. Meanwhile, the increase of non-photochemical quenching coefficient is helpful for the dissipation of excess light energy protecting the photosynthetic tissue and mitigating the stress of environment on photosynthesis.

     

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