Upregulation of antioxidant and glyoxalase systems mitigates NaCl stress in Brassica juncea by supplementation of zinc and calcium

Journal of plant interactions

article

Parvaiz Ahmad¹  Mohammed Nasser Alyemeni¹  Mohammad Abass Ahanger³  Leonard Wijaya¹  Pravej Alam⁴  Ashwani Kumar⁵  Muhammad Ashraf⁶ 

[1] Department of Botany and Microbiology, Faculty of Science, College of Science, King Saud University;Department of Botany, S.P. College;School of Studies in Botany, Jiwaji University;Biology Department, College of Science and Humanities, Prince Sattam bin Abdulaziz University;Metagenomics and Secretomics Research Laboratory, Department of Botany, Dr. Harisingh Gour University Central University;Department of Agronomy, College of Agriculture, University of Sargodha

关键词: NaCl stress;    calcium;    zinc;    growth;    antioxidants;    glyoxalase system;    nutrient uptake;   

DOI  :  10.1080/17429145.2018.1441452

学科分类：纳米科学和纳米技术

来源: Taylor & Francis

【 摘 要 】

Possible involvement of calcium (Ca) and zinc (Zn) in mitigation of salt (NaCl) stress-induced oxidative damage in Brassica juncea was investigated. Salt stress (200 mM NaCl) reduced leaf pigment synthesis and some key photosynthetic attributes including stomatal conductance and internal CO 2 concentration. Exogenous application of Ca and Zn resulted in enhanced growth possibly by induction of the antioxidant defense system, resulting in improved redox state thereby favoring growth improvement. Proline accumulation (3.39-fold) was stimulated by exogenous application of Zn and Ca causing improvement in growth through enhancement in relative water content (78.46%) and increased flavonoid accumulation (86.19%). NaCl stress enhanced the hydrogen peroxide (H 2 O 2 ), malondialdehyde and methylglyoxal content by 3-fold, 1.51-fold, and 2.98-fold, respectively, however, supplementation of Ca and Zn individually as well as in combination reduced the accumulation to an appreciable level. Ca and Zn treatment helped Brassica juncea plants to strengthen the antioxidant system and glyoxalase system and also enzymes of ascorbate-glutathione (AsA-Glu) cycle for better protection to membranes from reactive oxygen species. Moreover, Ca and Zn supplementation reduced the salt-induced damage by maintaining Na/K ratio through improved K uptake.

【 授权许可】

CC BY|CC BY-NC