Salt-Induced Changes in Physio-Biochemical and Antioxidant Defense System in Mustard Genotypes
Md. Shakhawat Hossain, Md. Daud Hossain, Abdul Hannan, Mirza Hasanuzzaman, Md. Motiar Rohman
Phyton-International Journal of Experimental Botany, Vol.89, No.3, pp. 541-559, 2020, DOI:10.32604/phyton.2020.010279
(This article belongs to the Special Issue:
Crop Production under Abiotic Stress: Physiological and Molecular Interventions)
Abstract Salinity stress is a major factor limiting plant growth and productivity
of many crops including oilseed. The present study investigated the identification
of salt tolerant mustard genotypes and better understanding the mechanism of salinity tolerance. Salt stresses significantly reduced relative water content (RWC),
chlorophyll (Chl) content, K
+ and K
+
/Na
+ ratio, photosynthetic rate (
PN), transpiration rate (
Tr), stomatal conductance (
gs), intercellular CO
2 concentration
(
Ci) and increased the levels of proline (Pro) and lipid peroxidation (MDA) contents, Na
+
, superoxide (O
2•−
) and hydrogen peroxide (H
2O
2) in both tolerant and
sensitive mustard genotypes. The tolerant genotypes maintained higher Pro and
lower MDA…
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