Halophilic bacteria mediated phytoremediation of salt-affected soils cultivated with rice

Shah, Gulmeena; Jan, Mehmood; Afreen, Mehvish; Anees, Muhammad; Rehman, Shafiq Ur; Daud, Muhammad; Malook, Ijaz; Jamil, Muhammad

doi:10.1016/j.gexplo.2016.03.011

Cited by 57 publications

(23 citation statements)

References 17 publications

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“…Conversely, inoculation of seeds with B. thuringiensis mitigates the adverse effects of salinity on the content of chlorophyll that improve the overall growth and proliferation of plants under stressful environments [80]. Beside this, the application of chitosan had also synergistic effects on the contents of chlorophyll a and b.…”

Section: Discussionmentioning

confidence: 99%

Chlorophyll Fluorescence Parameters and Antioxidant Defense System Can Display Salt Tolerance of Salt Acclimated Sweet Pepper Plants Treated with Chitosan and Plant Growth Promoting Rhizobacteria

et al. 2020

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Salinity stress deleteriously affects the growth and yield of many plants. Plant growth promoting rhizobacteria (PGPR) and chitosan both play an important role in combating salinity stress and improving plant growth under adverse environmental conditions. The present study aimed to evaluate the impacts of PGPR and chitosan on the growth of sweet pepper plant grown under different salinity regimes. For this purpose, two pot experiments were conducted in 2019 and 2020 to evaluate the role of PGPR (Bacillus thuringiensis MH161336 106–8 CFU/cm3) applied as seed treatment and foliar application of chitosan (30 mg dm−3) on sweet pepper plants (cv. Yolo Wonder) under two salinity concentrations (34 and 68 mM). Our findings revealed that, the chlorophyll fluorescence parameter (Fv/Fm ratio), chlorophyll a and b concentrations, relative water content (RWC), and fruit yield characters were negatively affected and significantly reduced under salinity conditions. The higher concentration was more harmful. Nevertheless, electrolyte leakage, lipid peroxidation, hydrogen peroxide (H2O2), and superoxide (O2−) significantly increased in stressed plants. However, the application of B. thuringiensis and chitosan led to improved plant growth and resulted in a significant increase in RWC, chlorophyll content, chlorophyll fluorescence parameter (Fv/Fm ratio), and fruit yield. Conversely, lipid peroxidation, electrolyte leakage, O2−, and H2O2 were significantly reduced in stressed plants. Also, B. thuringiensis and chitosan application regulated the proline accumulation and enzyme activity, as well as increased the number of fruit plant−1, fruit fresh weight plant−1, and total fruit yield of sweet pepper grown under saline conditions.

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Section: Discussionmentioning

confidence: 99%

Chlorophyll Fluorescence Parameters and Antioxidant Defense System Can Display Salt Tolerance of Salt Acclimated Sweet Pepper Plants Treated with Chitosan and Plant Growth Promoting Rhizobacteria

et al. 2020

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“… Promoted the growth of rice seedling and reduced ethylene production and antioxidant enzyme activities in the plant Sarkar et al ( 2018 ) Rice Bacillus sp. Aided the alleviation of salt stress by increasing the biomass and growth of rice seedling via production of indole acetic acid and deaminase enzyme Misra et al ( 2017 ) Festuca arundinacea Enterobacter ludwigii Membrane transport protein in the microbe that control sodium and hydrogen ion movement across bacteria cell and the production of plant hormone, phosphate solubilization, nitrogen fixation contribute towards the growth, tolerance, and plant productivity Kapoor et al ( 2017 ) Alfalfa Halomonas maura Ensifer meliloti Increased the weight of shoot dry weight, yield, and water content of the plant Martinez et al ( 2015 ) Rice Thalassobacillus denorans (NCCP-58) Oceanobacillus kapialis (NCCP-76) Inoculated plant was observed to have increased germination ability, root and shoot growth, protein, and chlorophyll contents as well as nutrient contents with reduced sodium ion accumulation in the plant Shah et al ( 2017 ) Rice Bacillus pumilus Enhanced plant growth and decreased the accumulation of sodium ions without having an effect on boron accumulation in the leaf tissues Khan et al ( 2016a ) Oat Klebsiella sp. It boosted plant growth, water content, dry shoot, and root weight of inoculated plant Sapre et al ( 2018 ) Wheat Bacillus subtilis Enhanced salicyclic acid content of the plant, leaf water content, and reduced proline and malondialdehyde content of the plant for better induction of systemic resistance Lastochkina et al ( 2017 ) Barley Hartmannibacter diazotrophicus The production of deaminase enzyme enhanced percentage root and shoot dry weight and growth of the plant Suarez et al ( 2015 ) Canola Enterobacter cloacae HSNJ4 Enhanced canola tolerance via promotion of plant hormone content of the plant and reduced ethylene and malondialdehyde content.…”

Section: Salt-induced Challenges On Plantmentioning

confidence: 99%

The influence of plant growth-promoting rhizobacteria in plant tolerance to abiotic stress: a survival strategy

Enebe

Babalola

2018

Appl Microbiol Biotechnol

254

105

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Action is needed to face the global threat arising from inconsistent rainfall, rise in temperature, and salinization of farm lands which may be the product of climate change. As crops are adversely affected, man and animals may face famine. Plants are severely affected by abiotic stress (drought, salinity, alkalinity, and temperature), which impairs yield and results in loss to farmers and to the nation at large. However, microbes have been shown to be of great help in the fight against abiotic stress, via their biological activities at the rhizosphere of plants. The external application of chemical substances such as glycine betaine, proline, and nutrients has helped in sustaining plant growth and productive ability. In this review, we tried to understand the part played by bioinoculants in aiding plants to resist the negative consequences arising from abiotic stress and to suggest better practices that will be of help in today’s farming systems. The fact that absolute protection and sustainability of plant yield under stress challenges has not been achieved by microbes, nutrients, nor the addition of chemicals (osmo-protectants) alone suggests that studies should focus on the integration of these units (microbes, nutrients, chemical stimulants, and osmo-protectants) into a strategy for achieving a complete tolerance to abiotic stress. Also, other species of microbes capable of shielding plant from stress, boosting yield and growth, providing nutrients, and protecting the plants from harmful invading pathogens should be sought.

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“…NaCl treatment induced a considerable increase in Na + concentrations in plants grown under SS and SS + MS compared to those grown under non-stressed control; however the inoculation with PBB, AMF and PBB + AMF reduced the uptake of Na + under SS and SS + MS. A possible explanation could be that the capacity of P. libanensis to synthesize EPS (Table 1) that can strongly bind cations to the bacterial cell surfaces along with the enhancement of their population density in the rhizosphere, may reduce Na + concentration available for plant uptake [60]. Similarly, several studies have found that inoculation of EPSproducing PGPM resulted in lower Na + concentrations in the tissues of O. sativa, Z. mays and Fragaria ananassa grown under SS [39,61,62]. Regardless of microbial inoculation, the addition of Ni did not influence plant accumulation of Na + , indicating that MS did not exacerbate the transport and mobility of Na + in H. annuus.…”

Section: Tablementioning

confidence: 99%

Potential of plant beneficial bacteria and arbuscular mycorrhizal fungi in phytoremediation of metal-contaminated saline soils

Rajkumar

Oliveira

et al. 2019

Journal of Hazardous Materials

173

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Phytoremediation has been considered as a promising technique to decontaminate polluted soils. However, climatic stress particularly salinity, is a potential threat to soil properties and plant growth, thus restricting the employment of this technology. The aim of this study was to access the impact of microbial inoculation on phytoremediation of nickel (Ni) contaminated saline soils using Helianthus annuus. Salt resistant plant beneficial bacterium (PBB) Pseudomonas libanensis TR1 and arbuscular mycorrhizal fungus (AMF) Claroideoglomus claroideum BEG210 were used. Inoculation of P. libanensis alone or in combination with C. claroideum significantly enhanced plant growth, changed physiological status (e.g. electrolyte leakage, chlorophyll, proline and mal-ondialdehyde contents) as well as Ni and sodium (Na +) accumulation potential (e.g. uptake and translocation factor of Ni and Na +) of H. annuus under Ni and salinity stress either alone or in combination. These results revealed that bioaugmentation of microbial strains may serve as a preferred strategy for improving phytor-emediation of metal-polluted saline soils.

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Halophilic bacteria mediated phytoremediation of salt-affected soils cultivated with rice

Cited by 57 publications

References 17 publications

Chlorophyll Fluorescence Parameters and Antioxidant Defense System Can Display Salt Tolerance of Salt Acclimated Sweet Pepper Plants Treated with Chitosan and Plant Growth Promoting Rhizobacteria

Chlorophyll Fluorescence Parameters and Antioxidant Defense System Can Display Salt Tolerance of Salt Acclimated Sweet Pepper Plants Treated with Chitosan and Plant Growth Promoting Rhizobacteria

The influence of plant growth-promoting rhizobacteria in plant tolerance to abiotic stress: a survival strategy

Potential of plant beneficial bacteria and arbuscular mycorrhizal fungi in phytoremediation of metal-contaminated saline soils

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