Exogenous proline mitigates the detrimental effects of salt stress more than exogenous betaine by increasing antioxidant enzyme activities

Hoque, Md. Anamul; Okuma, Eiji; Banu, Mst. Nasrin Akhter; Nakamura, Yoshimasa; Shimoishi, Yasuaki; Murata, Yoshiyuki

doi:10.1016/j.jplph.2006.03.010

Cited by 242 publications

(61 citation statements)

References 54 publications

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“…This could indicate that moderate salinity affected to a lesser extent the mycorrhizal plants, so they accumulated less proline. The concentrations of proline are always not high enough to adjust the osmotic potential in some plants under stress (Hoque et al 2007). In fact, the inhibition of growth of bean was higher in non-inoculated plants than in inoculated plants in spite of the fact that the levels of proline were similar for all plants under severe salinity.…”

Section: Discussionmentioning

confidence: 98%

Effects of plant growth-promoting rhizobacterium (PGPR) and arbuscular mycorrhizal fungus (AMF) on antioxidant enzyme activities in salt-stressed bean (phaseolus vulgaris l.)

Younesi¹,

Moradi²

2014

Agriculture (Pol'nohospodárstvo)

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Plant Growth-Promoting Rhizobacterium (PGPR) represents a wide variety of soil bacteria that, when grown in association with a host plant, result in stimulation of growth of their host. The aim of this study was to investigate the influence of inoculation with a PGPR, Pseudomonas fluorescence, alone or in combination with an arbuscular mycorrhizal fungus, Glomus mosseae (Nicol. & Gerd.), on antioxidant enzyme activities (catalase (CAT) and peroxidase (POX)), phosphatase activity, solutes accumulation, growth and minerals nutrient uptake in shoots of bean (Phaseolus vulgaris L.) affected by three levels of salt stress. Salinity decreased bean growth, regardless of the biological treatment and the salt stress level. The plants inoculated with P. fluorescence had significantly greater shoot biomass than the control plants at all salinity levels, whereas the mycorrhizal inoculation treatments were only effective in increasing shoot biomass at a low salinity level. The plants inoculated with P. fluorescence presented higher concentrations of shoots’ K+ and lower concentrations of shoots’ Na+ under high salt conditions. Salt stress increased shoots’ proline concentration, particularly in plants inoculated with the PGPR. Increasing salinity stress raised significantly the antioxidant enzyme activities, including those of total POX and CAT, of bean shoots compared with their corresponding nonstressed plants. The PGPR strain induced a higher increase in these antioxidant enzymes in response to severe salinity. Inoculation with selected PGPR could serve as a useful tool for alleviating salinity stress in salt-sensitive plants.

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Section: Discussionmentioning

confidence: 98%

Effects of plant growth-promoting rhizobacterium (PGPR) and arbuscular mycorrhizal fungus (AMF) on antioxidant enzyme activities in salt-stressed bean (phaseolus vulgaris l.)

Younesi¹,

Moradi²

2014

Agriculture (Pol'nohospodárstvo)

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“…LP induced higher CAT activity at 10 and 25 mM NaCl levels and this may suggest the role of CAT to eliminate NaCl-induced peroxides from the cytosol. Increase in the activity of antioxidant enzymes helps plants to adapt to salinity stress (Hoque et al 2007). Hoque et al (2007) reported low SOD, peroxidase and catalase activity in NaCl stressed cultured BY-2 cells than in non-stressed cells suggesting that these enzymes were unable to completely detoxify the H 2 O 2 generated by salt stress.…”

Section: Discussionmentioning

confidence: 99%

“…Increase in the activity of antioxidant enzymes helps plants to adapt to salinity stress (Hoque et al 2007). Hoque et al (2007) reported low SOD, peroxidase and catalase activity in NaCl stressed cultured BY-2 cells than in non-stressed cells suggesting that these enzymes were unable to completely detoxify the H 2 O 2 generated by salt stress. Many reports have indicated that antioxidant enzyme activity decreases in plant cells under salt stress (Khedr et al 2003;Mittova et al 2004) and that antioxidant enzymes such as SOD, catalase and peroxidase activity increases significantly in presence of proline (Chen and Dickman 2005;Hoque et al 2007;Khedr et al 2003).…”

Section: Discussionmentioning

confidence: 99%

Improving salinity resilience inSwertia chirayitaclonal line withLactobacillus plantarum

et al. 2016

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Plants defense responses to abiotic stresses, including salinity stress, involve stimulation of defense related pathways such as biosynthesis of secondary metabolites and induction of endogenous antioxidant enzyme responses. In the present study, a single seed origin clonal line of Swertia chirayita inoculated with Lactobacillus plantarum (LP) was grown under different salinity levels. Control had no LP inoculation. S. chirayita inoculated with LP showed higher accumulation of proline, low proline dehydrogenase activity, up-regulation of pentose phosphate pathway, down-regulation of succinate dehydrogenase activity (Krebs cycle) and low total phenolic content with increased salt concentrations. In comparison, S. chirayita without LP adopted a different biochemical mechanism to counter salt stress (NaCl) by up-regulating both pentose phosphate pathway and Krebs cycle along with stimulation of phenolic biosynthesis. Guaiacol peroxidase (GPX) activity increased with and without LP treatment in response to increasing concentrations of salt. These results indicate that S. chirayita inoculated with LP exhibits a greater salinity stress tolerance than S. chirayita without LP by adopting a more energy efficient defense responses and potentially efficiently partitioning carbon flux between primary and secondary metabolism to counter salt induced oxidative stress.

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“…To ameliorate the harmful effects of salinity on plant growth, seeds presoaked in certain exogenous protectant such as osmoprotectants [38, 39], plant hormone [40], and antioxidants [41] which have been found to be effective in mitigating the salt induced damage in plant.…”

Section: Discussionmentioning

confidence: 99%

Role ofUlva lactucaExtract in Alleviation of Salinity Stress on Wheat Seedlings

Ibrahim

Ali

Hemida

et al. 2014

The Scientific World Journal

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Seaweeds are potentially excellent sources of highly bioactive materials that could represent useful leads in the alleviation of salinity stress. The effects of presoaking wheat grains in water extract of Ulva lactuca on growth, some enzymatic activities, and protein pattern of salinized plants were investigated in this study. Algal presoaking of grains demonstrated a highly significant enhancement in the percentage of seed germination and growth parameters. The activity of superoxide dismutase (SOD) and catalase (CAT) increased with increasing the algal extract concentration while activity of ascorbate peroxidase (APX) and glutathione reductase (GR) was decreased with increasing concentration of algal extract more than 1% (w/v). The protein pattern of wheat seedling showed 12 newly formed bands as result of algal extract treatments compared with control. The bioactive components in U. lactuca extract such as ascorbic acid, betaine, glutathione, and proline could potentially participate in the alleviation of salinity stress. Therefore, algal presoaking is proved to be an effective technique to improve the growth of wheat seedlings under salt stress conditions.

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Exogenous proline mitigates the detrimental effects of salt stress more than exogenous betaine by increasing antioxidant enzyme activities

Cited by 242 publications

References 54 publications

Effects of plant growth-promoting rhizobacterium (PGPR) and arbuscular mycorrhizal fungus (AMF) on antioxidant enzyme activities in salt-stressed bean (phaseolus vulgaris l.)

Effects of plant growth-promoting rhizobacterium (PGPR) and arbuscular mycorrhizal fungus (AMF) on antioxidant enzyme activities in salt-stressed bean (phaseolus vulgaris l.)

Improving salinity resilience inSwertia chirayitaclonal line withLactobacillus plantarum

Role ofUlva lactucaExtract in Alleviation of Salinity Stress on Wheat Seedlings

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