Halophile plant growth-promoting rhizobacteria induce salt tolerance traits in wheat seedlings (Triticum aestivum L.)

Safdarian, Maryam; Askari, Hossein; Nematzadeh, Ghorbanali; Sofo, Adriano

doi:10.1016/s1002-0160(19)60835-0

Cited by 21 publications

(9 citation statements)

References 40 publications

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“…Globally, wheat is one of the most important crops, and a lot of studies are directed to the use of PGPB to increase the yield of wheat and alleviate the environmental stresses to it [17,[74][75][76][77]. In one of them, four rhizobacteria that produced different phytohormones, such as IAA, gibberellic acid, cytokinins, and abscisic acid, were isolated in in-vitro experiments under salt stress.…”

Section: Cytokinins Gibberellic Acid and Abscisic Acidmentioning

confidence: 99%

“…That investigation confirmed the utility of PGPR in saline soils as the plants had enhanced salinity tolerance, increased growth and K + /Na + ratio, and reduced endogenous ethylene production. Moreover, diverse genes were reported to be upregulated in the roots of salt-stressed plants [77]. In other studies on iron-deficient soil, the growth of Arabidopsis thaliana was induced by the inoculation of siderophores producing a Pseudomonas fluorescens strain [123].…”

Section: Iron Mobilizationmentioning

confidence: 99%

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Plant-Growth-Promoting Bacteria Mitigating Soil Salinity Stress in Plants

Shilev

2020

Applied Sciences

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Soil deterioration has led to problems with the nutrition of the world’s population. As one of the most serious stressors, soil salinization has a negative effect on the quantity and quality of agricultural production, drawing attention to the need for environmentally friendly technologies to overcome the adverse effects. The use of plant-growth-promoting bacteria (PGPB) can be a key factor in reducing salinity stress in plants as they are already introduced in practice. Plants having halotolerant PGPB in their root surroundings improve in diverse morphological, physiological, and biochemical aspects due to their multiple plant-growth-promoting traits. These beneficial effects are related to the excretion of bacterial phytohormones and modulation of their expression, improvement of the availability of soil nutrients, and the release of organic compounds that modify plant rhizosphere and function as signaling molecules, thus contributing to the plant’s salinity tolerance. This review aims to elucidate mechanisms by which PGPB are able to increase plant tolerance under soil salinity.

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Section: Cytokinins Gibberellic Acid and Abscisic Acidmentioning

confidence: 99%

Section: Iron Mobilizationmentioning

confidence: 99%

Plant-Growth-Promoting Bacteria Mitigating Soil Salinity Stress in Plants

Shilev

2020

Applied Sciences

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“…Microbial communities are natural technologies that could be exploited for plant growth and nutrient availability, with higher osmolyte accumulation (proline and sugars) under salinity stress conditions [12]. Among these microorganisms, plant growthpromoting rhizobacteria (PGPR) improve plant growth under salt stress conditions [13]. These PGPBs enhance plant growth and reduce salt absorption, which increases yield [14].…”

Section: Introductionmentioning

confidence: 99%

Bacillus mycoides PM35 Reinforces Photosynthetic Efficiency, Antioxidant Defense, Expression of Stress-Responsive Genes, and Ameliorates the Effects of Salinity Stress in Maize

Ali

Wang

Saleem

et al. 2022

Life

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Soil salinity is one of the abiotic constraints that imbalance nutrient acquisition, hampers plant growth, and leads to potential loss in agricultural productivity. Salt-tolerant plant growth-promoting rhizobacteria (PGPR) can alleviate the adverse impacts of salt stress by mediating molecular, biochemical, and physiological status. In the present study, the bacterium Bacillus mycoides PM35 showed resistance up to 3 M NaCl stress and exhibited plant growth-promoting features. Under salinity stress, the halo-tolerant bacterium B. mycoides PM35 showed significant plant growth-promoting traits, such as the production of indole acetic acid, siderophore, ACC deaminase, and exopolysaccharides. Inoculation of B. mycoides PM35 alleviated salt stress in plants and enhanced shoot and root length under salinity stress (0, 300, 600, and 900 mM). The B. mycoides PM35 alleviated salinity stress by enhancing the photosynthetic pigments, carotenoids, radical scavenging capacity, soluble sugars, and protein content in inoculated maize plants compared to non-inoculated plants. In addition, B. mycoides PM35 significantly boosted antioxidant activities, relative water content, flavonoid, phenolic content, and osmolytes while reducing electrolyte leakage, H2O2, and MDA in maize compared to control plants. Genes conferring abiotic stress tolerance (CzcD, sfp, and srfAA genes) were amplified in B. mycoides PM35. Moreover, all reactions are accompanied by the upregulation of stress-related genes (APX and SOD). Our study reveals that B. mycoides PM35 is capable of promoting plant growth and increasing agricultural productivity.

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“…Accordingly, in all three plants, the amount of IAA hormone increased under UHDs treatment compared to the control conditions. IAA is responsible for stimulating the longitudinal growth of shoots and roots and inducing protein production [24][25][26]. Increased levels of this hormone match the results of physiological seed germination (Figure 3a) and protein production (Figure 3c).…”

Section: Discussionmentioning

confidence: 62%

Study of Germination Efficiency and Temperature/Drowning Resistance in some Ornamental Plants treated with Ultra High Dilute Compounds

Mirzajani

Mirzajani²,

Aelaei³

2021

Int J High Dilution Res

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Background: The ultra-high dilutions (UHDs) can used for decreasing stress conditions causing by climate variations. Present research, it was investigated the effects of the ultra-high dilutions (UHDs) on some ornamental plants, germination, and hormonal variations. Methods: In order to study the effect of UHDs (Calendula officinalis Calen. and Arnica montana Arn.) on the physiological, primary metabolite and hormonal variations of the Oryza sativa L. (rice), 104 experiments were designed and statistically analyzed using the Design Expert 7.0.1 software over the general factorial design methodology. Two qualitative factors including the UHDs/placebo usage and the type of plant usage and two quantitative factors including temperature and irrigation were studied. The validated analysis was subjected to more extended studies on the variations in physiological growth, carbohydrate, protein content and levels of plants hormones including gibberellic acids, indole acetic acid, abscisic acid and salicylic acid. Results: The statistical analysis resulted in a prediction model which was more than 75% correlates with experimental results. The results showed that the UHDs increased the carbohydrate and protein content of seedlings. Also compared to placebo, the levels of hormones GA3 and IAA in all samples increase and the amount of GA4 decreases. The amount of ABA and SA hormones in S. officinalis increased under UHDs treatment while they decreased in the other two samples. Conclusion: The use of UHDs leads to an increase in the production of carbohydrate and protein content. Moreover, it causes significant variations in the growth inducing hormone and increase the tolerance of seeds under higher/lower temperature and draught/drowning. The results of this study open up a window to reduce the germination survival and increase their resistance to sudden climate change.

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Halophile plant growth-promoting rhizobacteria induce salt tolerance traits in wheat seedlings (Triticum aestivum L.)

Cited by 21 publications

References 40 publications

Plant-Growth-Promoting Bacteria Mitigating Soil Salinity Stress in Plants

Plant-Growth-Promoting Bacteria Mitigating Soil Salinity Stress in Plants

Bacillus mycoides PM35 Reinforces Photosynthetic Efficiency, Antioxidant Defense, Expression of Stress-Responsive Genes, and Ameliorates the Effects of Salinity Stress in Maize

Study of Germination Efficiency and Temperature/Drowning Resistance in some Ornamental Plants treated with Ultra High Dilute Compounds

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