The nature of PSII reactions stability under oxidative stress

Authors

  • Jeyhuna Jafarova Institute of Botany of National Academy of Sciences of Azerbaijan, Baku, AZ1073, Azerbaijan
  • Rena Ganiyeva Institute of Botany of National Academy of Sciences of Azerbaijan, Baku, AZ1073, Azerbaijan
  • Sona Bayramova Institute of Botany of National Academy of Sciences of Azerbaijan, Baku, AZ1073, Azerbaijan
  • Ralphreed Gasanov Baku State University, Baku, AZ1148, Azerbaijan

DOI:

https://doi.org/10.3329/bjb.v48i4.49051

Keywords:

Photosystem II, Reactive oxygen species (ROS), Photoinhibition, Methyl viologen, Na-ascorbate, Millisecond delayed flourescence

Abstract

Comparative investigations of millisecond delayed fluorescence of chlorophyll a (msec-DF Chl a) characteristics under oxidative stress induced separately by high intensity light and methyl viologen (MV) were investigated in pumpkin leaves (Cucurbita pepo L.). The inactivation of electron transport chain of PSII was observed in both experiments. The restoration of given characteristics observed at normal illumination with photoinhibited seedlings was found to enhance under action Na-ascorbate (Na-asc). The restoration of fluorescence characteristics on treated MV seedlings was recorded only at presence of Na-asc. Effect of Naasc to restore inactivated processes is considered to be due to its ability to actively neutralize reactive forms of oxygen generated under oxidative stress. It is suggested that mechanism leading to changes of induction pattern of msec-DF Chl a of PSII has common nature in both cases.

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Published

2019-12-31

How to Cite

Jafarova, J., Ganiyeva, R., Bayramova, S., & Gasanov, R. (2019). The nature of PSII reactions stability under oxidative stress. Bangladesh Journal of Botany, 48(4), 1029–1035. https://doi.org/10.3329/bjb.v48i4.49051

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Articles