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Nitric Oxide Alleviates Photochemical Damage induced by Cadmium Stress in Pea Seedlings

Phyton-international Journal of Experimental Botany 2022年第5期91卷 959-973页

作者： Ekhlaque A.Khan hamdino m.i.ahmed meena misra Pallavi Sharma Amarendra N.misra Department of Life Sciences Central University of JharkhandRanchi835205India Department of Biotechnology Ch.Bansilal UniversityBhiwaniHaryana127021India Horticulture Research institute(HRi) Agricultural Research Center(ARC)Giza12619Egypt School of Environment and Sustainable Development Central University of GujaratGandhinagar382030India

Cadmium(Cd),a life threatening hazardous heavy metal is abundant in *** amounts are greater in leaves than other plant parts,and it shows considerable effects on *** oxide(NO),a free radical present in living organisms,is now known as an important signaling molecule playing various physiological processes in *** this study,the possible ameliorative effect of NO on photosynthesis was examined on pea seedlings grown under Cd *** showed that chlorophyll,net photosynthetic rate,transpiration rate,stomatal conductance,photochemical efficiency of Photosystem ii and Photosystem i decreased,and Fo and nonphotochemical parameters for PSii and PSi significantly increased due to Cd *** suggests that Cd affects the photochemistry efficiency at both the PSii and PSi *** oxide supplementation through SNP ameliorated Cd stress by enhancing all the above mentioned parameters but causing a reduction in the Fo,and non-photochemical parameters of PSii and PSi in pea *** data indicate that the exogenous application of NO was useful in mitigating Cd-induced damage to photosynthesis in pea seedling.

关键词： Chlorophyll fluorescence oxidative stress Photosystem i Photosystem ii

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Nitric oxide alleviates cadmium-impeded growth by limiting ROS accumulation in pea seedlings

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BiOCELL 2022年第12期46卷 2583-2593页

作者： EKHLAQUE A.KHAN hamdino m.i.ahmed mEENA miSRA PALLAVi SHARmA AmARENDRA N.miSRA miRZA HASANUZZAmAN Department of Life Sciences Central University of JharkhandRanchi835205India Department of Biotechnology Chaudhary Bansi Lal UniversityBhiwani127021India Horticulture Research institute(HRi) Agricultural Research Center(ARC)Giza12619Egypt School of Environment and Sustainable Development Central University of GujratGandhinagar382030India School of Applied Sciences Centurion University of Technology and ManagementBhubaneswar752050India Department of Agronomy Faculty of AgricultureSher-e-Bangla Agricultural UniversityDhaka1207Bangladesh

Cadmium(Cd)causes oxidative stress,which leads to the oxidation of various biomolecules by the production of reactive oxygen species(ROS)to facilitate programmed cell death(PCD).The antioxidant defense system fails to detoxify ROS when it is produced in *** oxide(NO),a gaseous free radical and a phytohormone,regulates various physiological processes of ***,this work was undertaken to study the effects of the application of exogenous sodium nitroprusside(SNP,a NO donor)on growth parameters,oxidative stress,accumulation of secondary metabolites,and activities of antioxidant enzymes under Cd ***(50μm)and severe(200μm)Cd stress were applied to hydroponically grown pea(Pisum sativum L.)plants with or without 50μm *** Cd stress had a substantial impact on the *** effectiveness of NO in reducing Cd-induced negative effects on plant height,fresh weight,dry weight,protein content,nitrite content,nitrate reductase(NR)activity,catalase activity,and peroxidase activity were *** development,protein content,nitrite content,nitrate reductase(NR)activity,antioxidant defense systems disruption,overproduction of reactive oxygen species,and oxidative damage were *** antioxidant defense system(catalase and peroxidase activities)was activated by NO,which resulted in lower lipid peroxidation and lower hydrogen peroxide(H2O2)levels in Cd-exposed *** treatment boosted endogenous NO levels and NR activity in Cd-stressed plants while also enhanced proline levels to preserve osmotic *** presence of total phenols and flavonoids increased after SNP treatment,indicating that SNP enhanced stress recovery and boosted plant development in Cd-stressed plants.

关键词： Cadmium SNP Reactive oxygen species Oxidative stress Programmed cell death

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