论文部分内容阅读
绿豆叶圆片用0、-0.3、-0.6、-1.2、-1.8、-2.4MPa等6个渗透梯度处理24h后,其叶绿素荧光的反应表明:光系统 的潜在量子产量 Fv/Fm 和电子传递受体 QA 的库容 poolsize 均随胁迫强度的增大而减小,但QA库容的下降明显比Fv/Fm的下降缓和.结合原初荧光Fo和最大荧光Fm的变化,分析认为本实验中渗透胁迫并未导致明显的光系统 反应中心的失活或破坏.造成光系统 潜在量子效率降低的原因主要是通过光系统 反应中心到QA的电子传递受到阻抑.
Chlorophyll fluorescence response of mung bean leaf discs after 6 osmotic gradients (0, -0.3, -0.6, -1.2, -1.8 and -2.4MPa) for 24 h showed that the potential quantum yield of photosystem Fv / Fm and electron transfer The volume of pool QA decreased with the increase of stress intensity, but the decrease of QA storage volume was obviously less than the decrease of Fv / Fm.Considering the change of original fluorescence Fo and maximum fluorescence Fm, it was considered that the osmotic stress Did not result in significant deactivation or destruction of the photoreaction center, which is mainly due to the suppression of the electron transfer from the photoreaction center to the QA.