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Research article - Peer-reviewed, 2020

Selenium and Salt Interactions in Black Gram (Vigna mungo L.): Ion Uptake, Antioxidant Defense System, and Photochemistry Efficiency

Hassan, Muhammad Jawad; Raza, Muhammad Ali; Khan, Imran; Meraj, Tehseen Ahmad; Ahmed, Mukhtar; Shah, Ghulam Abbas; Ansar, Muhammad; Awan, Samrah Afzal; Khan, Nanak; Iqbal, Nasir; Peng, Yan; Li, Zhou;

Abstract

Salinity is a major abiotic stress which limits crop production, especially under rainfed conditions. Selenium (Se), as an important micronutrient, plays a vital role in mitigating detrimental effects of different abiotic stresses. The objective of this research was to examine the effect of Se fertilization on black gram (Vigna mungo) under salt stress. Our results showed that salt stress (100 mM NaCl) in leaves significantly induced oxidative damage and caused a decline in relative water content, chlorophyll (Chl), stomatal conductance (gs), photochemical efficiency (Fv/Fm), sucrose, and reducing sugars. A low dose of Se (1.5 ppm) significantly reduced hydrogen peroxide content, malondialdehyde formation, cell membrane damage, and also improved antioxidative enzyme activities, including superoxide dismutase, catalase, ascorbate peroxidase, glutathione reductase, and glutathione peroxidase under salt stress. Se-treated plants exhibited higher Chl, gs, Fv/Fm, sucrose, and reducing sugars than untreated plants in response to salt stress. In addition, Se application enhanced Se uptake and reduced Na+ uptake, but Cl remained unaffected. Our results indicated that a low dose of Se effectively alleviated salt damage via inhibition of Na+ uptake and enhanced antioxidant defense resulting in a significant decrease in oxidative damage, and maintained gaseous exchange and PS II function for sucrose and reducing sugars accumulation in black gram.

Keywords

ascorbate-glutathione cycle; micronutrient; fertilization; oxidative damage; chlorophyll; sugar

Published in

Plants

2020, volume: 9, number: 4, article number: 467
Publisher: MDPI

Authors' information

Hassan, Muhammad Jawad
Sichuan Agr Univ
Raza, Muhammad Ali
Sichuan Agr Univ
Khan, Imran
Sichuan Agr Univ
Meraj, Tehseen Ahmad
Sichuan Agr Univ
Pir Mehr Ali Shah Arid Agriculture University
Swedish University of Agricultural Sciences, Department of Agricultural Research for Northern Sweden
Shah, Ghulam Abbas
PMAS Arid Agr Univ
Ansar, Muhammad
PMAS Arid Agr Univ
Awan, Samrah Afzal
Sichuan Agr Univ
Khan, Nanak
Balochistan Agr Coll
Iqbal, Nasir
Univ Adelaide
Peng, Yan
Sichuan Agr Univ
Li, Zhou
Sichuan Agr Univ

UKÄ Subject classification

Agricultural Science

Publication Identifiers

DOI: https://doi.org/10.3390/plants9040467

URI (permanent link to this page)

https://res.slu.se/id/publ/106827