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Ameliorative Role of Pre-Sowing Proline Treatment in Coriandrum sativum *** under Mercury Toxicity

Phyton-International Journal of Experimental Botany 2021年第2期90卷 489-501页

作者： Dhriti Kapoor kapani kavani Amandeep Rattan Marco Landi Anket Sharma Department of Botany School of Bioengineering and BiosciencesLovely Professional UniversityPhagwara144411India Department of Botanical and Environmental Sciences Guru Nanak Dev UniversityAmritsar143005India Department of Agriculture Food and EnvironmentUniversity of PisaPisa56124Italy State Key Laboratory of Subtropical Silviculture Zhejiang A&F UniversityHangzhou311300China

Heavy metal toxicity is one of the major ecosystem concerns globally in present time and is also responsible for significant threat to agronomic *** current work was conducted to investigate the possible ameliorative role of proline in Coriandrum sativum *** treated with mercury(Hg).The seedlings were exposed to different concentrations of Hg(0,0.1,0.3 and 0.5 mM)for 20 *** effects of pre-sowing treatment with proline were studied on *** seedlings in terms of pigment(chlorophylls,carotenoids and anthocyanins),malondialdehyde(MDA),antioxidant compound(glutathione,total phenolic compounds,ascorbic acid)and osmolytes(proline,glycine betaine).Additionally,activities of antioxidant enzymes,namely catalase(CAT),superoxide dismutase(SOD),ascorbate peroxidase(APX)and dehydroascorbate reductase(DHAR)were also studied.A strong decline of photosynthetic pigment concentrations was observed in leaves of *** under Hg *** of seeds with proline reduced the loss of photosynthetic pigments,counteract Hg-triggered oxidative stress,likely preserving the functionality of antioxidant apparatus under Hg *** increment of total polyphenols and glycine betaine also contributed in ameliorating Hg toxicity,suggesting the use of exogenous proline as a potential method to enhance the plant tolerance against heavy metal stress.

关键词： Anthocyanins Hg stress metal toxicity polyphenols proline pre-treatment

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