Effects of ascorbic acid and gibberellin A3 on alleviation of salt stress in common bean (Phaseolus vulgaris L.) seedlings

Abstract

Salinity, a severe environmental factor, has limited the growth and productivity of crops. Many compounds have been applied to minimize the harmful effects of salt stress on plant growth. An experiment was conducted to investigate the interactive effects of exogenous ascorbic acid (AsA) and gibberellic acid (GA 3 ) on common bean (Phaseolus vulgaris L. cv. Naz) seedlings under salt stress. The changes of growth parameters, photosynthetic and non-photosynthetic pigments and potassium content showed that the addition of 1 mM AsA and/or 0.05 mM GA 3 considerably decreased the oxidative damage in common bean plants treated with 200 mM NaCl. The NaCl-stressed seedlings exposed to AsA or GA 3 , specifically in their combination, exhibited an improvement in sodium accumulation in both roots and shoots, as compared to NaCl-treated plants. NaCl treatment increased hydrogen peroxide (H 2 O 2 ) content and lipid peroxidation indicated by accumulation of malondialdehyde (MDA), whereas the interaction of AsA with GA 3 decreased the amounts of MDA and H 2 O 2 . In the meantime, interactive effect of these substances enhanced protein content and the activity of the antioxidant enzyme, guaiacol peroxidase, in common bean plants under salt stress. It was concluded that synergistic interaction between AsA and GA 3 could alleviate the adverse effects of salinity on P. vulgaris seedlings.

Ascorbic acid improves the tolerance of wheat plants to lead toxicity

“…2 A&B). Additionally, ASC protects chloroplasts from oxidative damage by stimulating IAA and GA 3 synthesis and by inhibiting ABA formation (Saeidi-Sar et al, 2013;Gul et al, 2015).…”

The modified qualities of basil plants by selenium and/or ascorbic acid

“…Therefore, its pool size may serve as an underlying mechanism in plant protection against photoinhibition, especially under stress conditions. It has been reported that the exogenously supplemented ascorbate in plants exposed to abiotic stressors had a vital impact on the prevention of lipid peroxidation and the restoration of the plasma membrane (Bai et al, 2013;Saeidi-Sar et al, 2013).…”

“…The regulating role of Se on the uptake and redistribution of some essential elements like S, Zn, Mn, Cu, and Fe, especially the latter, is introduced as a key mechanism to stimulate the antioxidant system, decrease the levels of reactive oxygen species, and enhance chlorophyll biosynthesis pathways, thereby improving plant resistance to stress (Feng et al, 2013). Considering the pivotal roles of ascorbate and GSH metabolites in antioxidant defenses (Noctor and Foyer, 1998), these compounds play an important role in the protection against oxidative damage under abiotic stress (Bai et al, 2013;Gallie, 2013;Saeidi-Sar et al, 2013).…”

Effects of Gibberellic Acid, Methyl Jasmonate and Chitosan on Antioxidant Enzyme Activity in Peppermint (Mentha Piperita L.)

“…In contrast, GPX activity prominently increased respectively at 12 and 24h after GA 3 treatment relative to control (Figure 4). Evidences exist that confirm increase in antioxidant enzyme activities under GA treatment, especially in various stressful conditions [20][21][22].…”