Microbes in Cahoots with Plants: MIST to Hit the Jackpot of Agricultural Productivity during Drought

Kaushal, Manisha

doi:10.3390/ijms20071769

Cited by 44 publications

(26 citation statements)

References 152 publications

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“…Hence, integrating drought-tolerant beneficial microbes as a component of ecological systems to enhance plant drought tolerance might represent an interesting strategy. At the moment, efforts have been focused on harnessing the potential of phytobeneficial soil microbes to enhance environmental rehabilitation to combat the negative impacts of drought [ 11 ]. The positive influence of PGPR on conferring resistance to DS in many crops and trees has been reported [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Plant Growth-Promoting Rhizobacteria Isolated from Degraded Habitat Enhance Drought Tolerance of Acacia (Acacia abyssinica Hochst. ex Benth.) Seedlings

Alemayehu

Muleta

Assefa

et al. 2020

International Journal of Microbiology

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Drought stress (DS) is the most impacting global phenomenon affecting the ecological balance of a particular habitat. The search for potential plant growth-promoting rhizobacteria (PGPR) capable of enhancing plant tolerance to drought stress is needed. Thus, this study was initiated to evaluate the effect of inoculating Acacia abyssinica seedlings with PGPR isolated from rhizosphere soil of Ethiopia to enhance DS tolerance. The strains were selected based on in vitro assays associated with tolerance to drought and other beneficial traits such as salinity, acidity, temperature, heavy metal tolerances, biofilm formation, and exopolysaccharide (EPS) production. The strains with the best DS tolerance ability were selected for the greenhouse trials with acacia plants. The results indicate that out of 73 strains, 10 (14%) were completely tolerant to 40% polyethylene glycol. Moreover, 37% of the strains were strong biofilm producers, while 66 (90.41%) were EPS producers with a better production in the medium containing sucrose at 28 ± 2°C and pH 7 ± 0.2. Strains PS-16 and RS-79 showed tolerance to 11% NaCl. All the strains were able to grow in wider ranges of pH (4–10) and temperature (15–45°C) and had high tolerance to heavy metals. The inoculated bacterial strains significantly ( p ≤ 0.05 ) increased root and shoot length and dry biomass of acacia plants. One of the strains identified as P. fluorescens strain FB-49 was outstanding in enhancing DS tolerance compared to the single inoculants and comparable to consortia. Stress-tolerant PGPR could be used to enhance acacia DS tolerance after testing other phytobeneficial traits.

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Section: Introductionmentioning

confidence: 99%

Plant Growth-Promoting Rhizobacteria Isolated from Degraded Habitat Enhance Drought Tolerance of Acacia (Acacia abyssinica Hochst. ex Benth.) Seedlings

Alemayehu

Muleta

Assefa

et al. 2020

International Journal of Microbiology

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“…A biomarker used for oxidative stress-induced lipid peroxidation is MDA content measurement or quantification (Kaushal, 2019). During salt stress, the main targets of ROS are membrane phospholipids that contain polyunsaturated fatty acids.…”

Section: Discussionmentioning

confidence: 99%

Role of Grafting in Tolerance to Salt Stress in Melon (Cucumis melo L.) Plants: Ion regulation and antioxidant defense systems

2021

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Grafting in vegetables is a method that has been commonly used in recent years, not just for the treatment of soil borne diseases and pests, but also to facilitate higher abiotic stress tolerance under conditions such as salinity. Herein, it was aimed to determine if the salt tolerance of two salt-susceptible melon genotypes, SCP-1 and SCP-2, could be improved by grafting onto TLR-1 and TLR-2, which are salt-tolerant melon genotypes, and Albatros commercial melon rootstock. The grafted plants were grown in plastic pots containing a peat: perlite mixture and exposed to NaCl at doses of 0 and 200 mM under greenhouse conditions. The salt-tolerant rootstock significantly diminished the damaging effects caused by salt stress via a reduction in the uptake of Na and Cl, which enhanced Ca and K uptake and micronutrition. Stressinduced activities of catalase, superoxide dismutase, ascorbate peroxidase, and glutathione reductase were considerably higher in the grafted plants. The results showed that grafting salt susceptible plants onto the salt-tolerant rootstock improved the growth regulation. The salt tolerance of the grafted melon seedlings may have partially been the result of the decreased Na and Cl, and malondialdehyde contents and higher antioxidant enzyme activities.

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“…The differential expression of multiple genes such as COX1 (regulates energy and carbohydrate metabolism), ERD15 (Early response to dehydration 15), PKDP (protein kinase), AP2-EREBP (stress responsive pathway), Hsp20, bZIP1 and COC1(chaperones in ABA signalling) in Pseudomonas fluorescens treated rice was established. Similarly RAB18 (ABA-responsive gene), LbKT1, LbSKOR (encoding potassium channels) in Lycium barbarum, jasmonate MYC2 gene in chickpea, ADC, AIH, CPA, SPDS,SPMS and SAMDC (polyamine biosynthesis), ACO, ACS (ethylene biosynthesis), PR1 (SA regulated gene), pdf1.2 (JA marker genes) and VSP1 (ethylene-response gene) in Pseudomonas treated Arabidopsis plants were established for drought tolerance 125,128,129 . Molecular networks of signal transduction genes are also involved in drought stress responses 130,131 .…”

Section: Role Of Rhizobacteria On Antioxidant Defense System For Indumentioning

confidence: 99%

Rhizobacteriome: Promising Candidate for Conferring Drought Tolerance in Crops

Yadav¹,

Raghav²,

Sharma³

et al. 2020

J. Pure Appl. Microbiol.

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Drought is a global water shortage problem which poses challenge to crop productivity. Novel strategies are being tried to find out solution to sustain agriculture under drought conditions. Rhizobacteriome is an exclusive genetic material of bacteria resident to rhizosphere plays critical role to health and yield of plant. The interaction of rhizobacteriome with plant provides basis for protecting plants from various abiotic and biotic stresses. Plant growth promoting rhizobacteria (PGPR) are root-colonizing bacteria which produce array of enzymes and metabolites that assist plants to withstand harsh environmental conditions. Various formulations of rhizobacteria are being applied to enhance the tolerance or endurance to drought in crops which in turn increase crop productivity. This could be a one of the promising methods with wide potentiality to improve the growth and yield of crops under limited water resources and changing climatic conditions to ensure food security of the globe. In this review, we summarize (1) existing knowledge and understanding about the rhizobacteria, (2) their role in imparting tolerance to crops in drought conditions and (3) discuss future line of work in this frontier research area.

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Microbes in Cahoots with Plants: MIST to Hit the Jackpot of Agricultural Productivity during Drought

Cited by 44 publications

References 152 publications

Plant Growth-Promoting Rhizobacteria Isolated from Degraded Habitat Enhance Drought Tolerance of Acacia (Acacia abyssinica Hochst. ex Benth.) Seedlings

Plant Growth-Promoting Rhizobacteria Isolated from Degraded Habitat Enhance Drought Tolerance of Acacia (Acacia abyssinica Hochst. ex Benth.) Seedlings

Role of Grafting in Tolerance to Salt Stress in Melon (Cucumis melo L.) Plants: Ion regulation and antioxidant defense systems

Rhizobacteriome: Promising Candidate for Conferring Drought Tolerance in Crops

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