Zinc application mitigates the adverse effects of NaCl stress on mustard [ Brassica juncea (L.) Czern & Coss] through modulating compatible organic solutes, antioxidant enzymes, and flavonoid content

Journal of plant interactions

article

Parvaiz Ahmad¹  Mohammad Abass Ahanger³  Mohammed Nasser Alyemeni¹  Leonard Wijaya¹  Dilfuza Egamberdieva⁴  Renu Bhardwaj⁵  Mohammad Ashraf⁶ 

[1] Department of Botany and Microbiology, Faculty of Science, King Saud University;Department of Botany, S.P. College;School of Studies in Botany, Jiwaji University;Institute of Landscape Biogeochemistry, Leibniz Centre for Agricultural Landscape Research;Plant Stress Physiology Laboratory, Department of Botanical and Environmental Sciences, Guru Nanak Dev University;Department of Agronomy, College of Agriculture, University of Sargodha

关键词: Brassica juncea;    NaCl;    zinc;    oxidative stress;    antioxidants;    flavonoids;   

DOI  :  10.1080/17429145.2017.1385867

学科分类：纳米科学和纳米技术

来源: Taylor & Francis

【 摘 要 】

This study examined the protective effect of Zn on salt-stressed Brassica juncea plants using some key morphological and biochemical attributes at different developmental stages (30, 60, and 90 days after treatment [DAT]). Salt stress (200 mM) caused suppression in plant height, root length, and dry weight by 58.35%, 41.15%, and 53.33%, respectively, at 90 DAT, but Zn application improved these variables by 15.52%, 16.59%, and 11.45%, respectively. Furthermore, 200 mM NaCl decreased total chlorophyll by 45.32% and relative water content by 27.62% at 90 DAT, whereas Zn application compensated the decrease in the levels of both variables. NaCl (200 mM) increased H2O2, malondialdehyde, and electrolyte leakage by 70.48%, 35.25%, and 68.39%, respectively, at 90 DAT, but Zn supplementation appreciably reduced these variables. Except for catalase, enzymatic antioxidant activity increased under NaCl stress. Zn application with salt further increased the activities of superoxide dismutase, catalase, ascorbate peroxidase, glutathione reductase, and glutathione-Stransferase by 33.51%, 9.21%, 10.98%, 17.46%, and 12.87%, respectively, at 90 DAT. At 90 DAT, salt stress increased flavonoids by 24.88%, and Zn supply by a further 7.68%. Overall, Zn mitigated the adverse effects of salt stress through osmotic adjustment, as well as by modulating the oxidative defense system and flavonoid contents.

【 授权许可】

CC BY|CC BY-NC