Melatonin induced changes in photosynthetic efficiency as probed by OJIP associated with improved chromium stress tolerance in canola (Brassica napus L.)

Heliyon
Ahsan AyyazMuhammad Ahsan Farooq

Abstract

Chromium toxicity is considered as a major problem for agricultural soil that reduced crop productivity by affecting photosynthetic tissues. Exogenous application of melatonin can alleviate the adverse effects of chromium toxicity on plant growth. However, little is known about its effect on thylakoidal protein complexes responsible for conversion of solar energy to biochemical energy. Chlorophyll fluorescence a transients considered one of the best non-invasive and rapid method for the evaluation of photosynthetic (Photosystem II) efficiency of plants and plant health under environmental stress conditions. In the present study, three-week old plants of two canola cultivars AC-Excel and DGL were applied to melatonin (0, 1, 5, 10 μM) when grown under chromium stress (0, 50 and 100 μM) for further two weeks. Chromium stress reduced the growth (fresh and dry weights of shoots and roots) of both canola cultivars and exogenous application of 5 and 10 μM melatonin improved the growth of canola at 50 or 100 μM chromium stress. This improvement was greater in cv DGL than in AC-Excel. Increasing chromium decreased the photosynthetic pigments (chlorophyll a and chlorophyll b). However, 5 and 10 μM melatonin application improved chlorophy...Continue Reading

References

Jun 19, 2013·Environmental Toxicology and Chemistry·Shafaqat AliGuoping Zhang
Aug 16, 2014·Journal of Experimental Botany·Na ZhangYang-Dong Guo
Aug 15, 2015·Journal of Pineal Research·Lucien C ManchesterRussel J Reiter
Oct 21, 2017·International Journal of Phytoremediation·Yi TangLihua Tu
Feb 8, 2018·Environmental Monitoring and Assessment·Lijin LinWei Ren

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Citations

Aug 3, 2021·Plant Physiology and Biochemistry : PPB·Yuanpei SunTengguo Zhang

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Methods Mentioned

BETA
environmental stress
transgenic

Software Mentioned

CoStat
Excel
AC

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