Salinity and its effects on the functional biology of legumes

Manchanda, Geetanjali; Garg, Neera

doi:10.1007/s11738-008-0173-3

Cited by 297 publications

(147 citation statements)

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“…Antioxidant enzymes, which play crucial role in mitigation of oxidative stress, have been shown to be elevated under variety of stresses (Manchanda and Garg 2008). APX and POX which reached highest levels beyond 200 mM NaCl at 48 and 72 h of exposure coincided with increased levels of H 2 O 2 , indicating their role in detoxification of H 2 O 2 in Lablab leaves under high salinity stress.…”

Section: Discussionmentioning

confidence: 99%

“…The degree of resistance of plants to salinity is often related to quantitative and qualitative changes in antioxidant systems. The role of non-enzymatic antioxidants such as carotenoids, ascorbate (ASC), glutathione (GSH), tocopherols, and proline is evident from a number of plants systems (Manchanda and Garg 2008). Similarly, increased SOD, APX, POX, CAT, and GR (Agarwal and Shaheen 2007) have been correlated to salinity tolerance.…”

Section: Introductionmentioning

confidence: 99%

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Biochemical responses of Hyacinth bean (Lablab purpureus) to salinity stress

D’souza

Devaraj

2009

Acta Physiol Plant

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Effect of salinity on Hyacinth bean, Lablab purpureus (HA-4 cultivar) was evaluated in 10-day old seedlings with 100-500 mM NaCl over 72 h of exposure. The stress reduced dry and fresh weight, leaf surface area, root and shoot length, total chlorophyll, and RWC. Oxidative stress markers, H 2 O 2 , glutathione, TBARS, proline, ascorbic acid, total phenols, and total soluble sugar contents were significantly elevated. Salinity enhanced antioxidant enzymes, POX, and GR activities and reduced that of CAT in concentration and time dependent manner in leaves. Antioxidant enzymes in roots showed inverse relationship with concentration and time of exposure. Metabolic enzyme b-amylase activity increased in both leaves and roots. Acid phosphatase decreased in leaves and elevated in roots. Intensity of constitutive isozymes correlated with in vitro levels under stress, but the protein band patterns differed from controls. Lablab showed reasonable tolerance up to 300 mM NaCl, but leaves and roots differed in their response.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biochemical responses of Hyacinth bean (Lablab purpureus) to salinity stress

D’souza

Devaraj

2009

Acta Physiol Plant

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“…In both cases, inhibition could have been produced by the adverse water and toxicity effects of both Na + and Cl − ions on metabolism. In addition, a secondary aspect of salinization in plants involves the stress-induced production of ROS (Manchanda and Garg, 2008). Sathish et al, (1997) found that Na + /K + levels in callus cells rise when exposed to salinity, though the mechanism by which such action is accomplished was different.…”

Section: Biochemical Estimationmentioning

confidence: 99%

Accumulation of antioxidants in rice callus (Oryza sativa L.) induced by β-glucan and salt stress

Alhasnawi¹,

Zain²,

Kadhimi³

et al. 2017

Aust J Crop Sci

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Salinity stress causes a considerable reduction in callus growth. Mushroom polysaccharides (β-glucan) are the most promising groups of antioxidant compounds. An in vitro experiment was conducted to evaluate the potential function of exogenously applied β-glucan in alleviating the accumulation of antioxidants in rice callus. In this study, morphological, chemical, and biochemical parameters of an embryogenic callus of the rice variety, MR269, were investigated under 200mM NaCl stress conditions after pre-treatment with (0, 0.5, 1 and 1.5 mg/L) β-glucan in culture media. The present study sought to evaluate chemical, biochemical, and callus growth characterization. The results revealed that callus exposed to stressful media exhibited a significant decrease in callus growth and contents of K + and Ca +2. In addition, significant accumulation of Na + and Na + /K + was found, as well as an enhanced enzymatic antioxidant system and elevated proline activities under NaCl conditions. Furthermore, exogenous addition of β-glucan at 0.5-1.5mg/L under NaCl stress induced a pronounced, significant increase of callus growth, K + and Ca +2 contents, and enzymatic antioxidant and proline activities. In contrast, a significant decrease was found in the levels of Na + and Na + /K + , particularly in callus treated with NaCl. β-Glucan ameliorates the adverse effects of NaCl stress, and the extent of amelioration depends on the type of β-glucan agent as well as treatment duration (three months). The changes mentioned are important for determining the morphological, chemical, and biochemical parameters of salinity tolerance in callus. This study demonstrated that exogenous β-glucan exhibits alleviation of the harmful effects of salt stress and increases salinity resistance in callus rice.

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“…High soil salinity can suppress plant growth, restrain photosynthesis, and decrease metabolic processes (Manchanda and Garg 2008;Munns and Tester 2008;Li et al 2014). For example, Munns and Tester (2008) report that plant response to salinity decreased stomatal aperture and root osmotic activity, stored carbohydrate in leaf cells to mitigate the toxicity of salinity on roots in a saline environment, and further decreased photosyntheticallyfixed C flow from aboveground to belowground plant parts with the effect of salinity inhibition of root cell division and expansion, as shown by the higher percentage of net assimilated 13 C in shoots in HS soil than in LS soil at all pulses at end 6-h (Fig.…”

Section: Percentagementioning

confidence: 99%