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VOL. 8, ISSUE 2 (2026)
Understanding the effect of plant growth regulators on Indian mustard [Brassica juncea (L.) Czern and Coss.] under saline water irrigation condition
Authors
Vadhel Hiteshkumar, U K Kandoliya, Asha H Sarmali, Kundan, Vishnu Gore
Abstract
Salinity stress is one of the most important abiotic factors limiting
the growth, physiological efficiency, and productivity of Indian mustard
(Brassica juncea L. Czern. & Coss.), particularly in arid and semi-arid
regions where the use of saline irrigation water is common. The present
investigation was undertaken to evaluate the effectiveness of plant growth
regulators, namely gibberellic acid (GA₃) and salicylic acid (SA), in
alleviating the adverse effects of salinity stress on physiological and biochemical
characteristics of Indian mustard. The experiment was conducted under
greenhouse conditions using different levels of saline irrigation water in
combination with foliar application of plant growth regulators. Salinity stress
adversely affected plant water relations, membrane stability, photosynthetic
pigments, and protein content, while promoting the accumulation of various
osmoprotectants and antioxidant metabolites. Application of plant growth
regulators significantly mitigated the detrimental effects of salinity by
improving relative water content, membrane stability, chlorophyll retention,
and protein synthesis. Moreover, treated plants exhibited enhanced accumulation
of compatible solutes and antioxidant compounds, which contributed to improved
osmotic adjustment and protection against oxidative damage. Among the
treatments, salicylic acid proved more effective than gibberellic acid in
enhancing stress tolerance and maintaining physiological and biochemical
homeostasis under saline conditions. The results suggest that exogenous
application of plant growth regulators, particularly salicylic acid, can be an
effective and environmentally friendly approach for improving salinity
tolerance and sustaining crop performance in Indian mustard under saline
irrigation conditions.
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Pages:274-281
How to cite this article:
Vadhel Hiteshkumar, U K Kandoliya, Asha H Sarmali, Kundan, Vishnu Gore "Understanding the effect of plant growth regulators on Indian mustard [<i>Brassica juncea </i>(L<i>.</i>)<i> Czern </i>and<i> Coss</i><i>.</i>] under saline water irrigation condition". International Journal of Agriculture and Plant Science, Vol 8, Issue 2, 2026, Pages 274-281
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