Mitigation of salt stress in maize (Zea mays L.) by glycine betaine and glutathione
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Date
2021
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Punjab Agricultural University, Ludhiana
Abstract
In the present investigation, the effect of glycine betaine and glutathione on physiological and
biochemical parameters was studied at different salt stress levels in maize (Zea mays L.) in
two cvs. J 1006 and J 1007. The salt stress had adverse effects on seed germination and seed
vigour parameters. Seeds of maize were subjected to different treatments viz. hydration,
glycine betaine (10 mM, 20 mM) and glutathione (100 ppm, 500 ppm) at salt stress of 50
mM, 75 mM and 100 mM NaCl. Different parameters were recorded from seedlings after 10
days of germination. The seed treatments increased the physiological (percent germination,
seedling length, seedling biomass, speed of germination, vigour index I and II) and
biochemical parameters (total soluble sugars, total soluble proteins, proline content and
activities of antioxidant enzymes viz. catalase, peroxidase and superoxide dismutase) of
seedlings as compared to control. However, malondialdehyde content decreased with seed
treatments at all salinity levels in both the cultivars. The results showed that glycine betaine
20 mM and glutathione 500 ppm were more effective than glycine betaine 10 mM and
glutathione 100 ppm, respectively. Thus, the application of glycine betaine and glutathione
could play an important role in improving the salt stress tolerance by osmoprotection and
scavenging the free radicals.
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Chhatwal, Himani (2021). Mitigation of salt stress in maize (Zea mays L.) by glycine betaine and glutathione (Unpublished M.Sc. thesis). Punjab Agricultural University, Ludhiana, Punjab, India.