Toward an enhanced understanding of plant growth promoting microbes for sustainable agriculture

Sati, Diksha; Pandey, Satish Chandra; Pande, Veni; Upreti, Shobha; Gouri, Vinita; Joshi, Tushar; Gangola, Saurabh; Debbarma, Prasenjit; Pandey, Anupam; Samant, Mukesh

doi:10.1016/b978-0-12-821265-3.00005-0

Cited by 11 publications

(3 citation statements)

References 83 publications

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“…Rhizospheric bacteria promote plant growth directly by delivering substances synthesized by them or assisting the absorption of soil nutrients to the plant, i.e., by phytohormone and siderophore formation, dissolution of minerals (P, Zn, K), and reducing ethylene levels in plants [3]. Indirect growth promotion involves the exclusion of harmful effects of a pathogenic organism by diverse means, e.g., imparting resistance from the pathogen, production of antibiotics enzymes, and/or anti-fungal chemicals [4]. Plants are susceptible to a variety of abiotic stresses.…”

Section: Introductionmentioning

confidence: 99%

Isolation, and Characterization of Indigenous Rhizobacteria from Wheat (Triticum aestivum L.) and Determining their Drought Tolerance

Sati¹,

Pande²,

Samant³

2023

azb

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Agricultural productivity is under serious threat as a result of the increased severity of droughts brought on by human activity and global warming. Hence, to ensure the security of the world's food supply, this has increased the demand for environmentally friendly alternatives. Numerous studies have associated the rhizobacteria that promote plant growth with the plants' adaptations to fluctuating environments. The present study was conducted over a period of 6 months, during which the drought tolerance potential of native bacteria from the Wheat (Triticum aestivum L.) rhizosphere was evaluated. A total of 10 different bacteria were isolated from the rhizosphere of flowering-stage wheat plants growing in the departmental garden of SSJ University, Almora, Uttarakhand by serial dilution technique. After a biochemical analysis, their drought tolerance potential was investigated and growth was monitored. Out of a total of ten isolates, only three were able to grow at 25% PEG. The ideal temperature range for the growth of these 3 rhizobacterial isolates was found to be 28-37ºC. The present study highlights the role of rhizospheric bacteria in augmenting plant growth by providing drought tolerance.

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Section: Introductionmentioning

confidence: 99%

Isolation, and Characterization of Indigenous Rhizobacteria from Wheat (Triticum aestivum L.) and Determining their Drought Tolerance

Sati¹,

Pande²,

Samant³

2023

azb

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“…In this review, we are therefore seeking to shed more light on the various mechanisms employed by bacteria to ameliorate the harmful impacts of drought stress on plants and further using them for agricultural sustainability (14).…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in PGPR and Molecular Mechanisms Involved in Drought Stress Tolerance

Sati¹,

Pande²,

Sc³

et al. 2021

Preprint

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Increased severity of droughts, due to anthropogenic activities and global warming has imposed a severe threat on agricultural productivity ever before. This has further advanced the need for some eco-friendly approaches to ensure global food security. In this regard, application of plant growth-promoting rhizobacteria (PGPR) can be beneficial. PGPR through various mechanisms viz. osmotic adjustments, increased antioxidant, phytohormone production, regulating stomatal conductivity, increased nutrient uptake, releasing Volatile organic compounds (VOCs), and Exo-polysaccharide (EPS) production, etc not only ensures the plant’s survival during drought but also augment its growth. This review, extensively discusses the various mechanisms of PGPR in drought stress tolerance. We have also summarized the recent molecular and omics-based approaches for elucidating the role of drought responsive genes. The manuscript presents an in-depth mechanistic approach to combat the drought stress and also deals with designing PGPR based bioinoculants. Lastly, we present a possible sequence of steps for increasing the success rate of bioinoculants.

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“…As a result, new solutions that offer higher crop yields while still ensuring ecological protection are urgently needed. One of the approaches to help plants cope with drought is by using PGPR, which has been documented to boost the nutritional, biochemical, physiological, and morphological properties of several plants in an environment-friendly and cost-effective manner (Sati et al, 2020). PGPR promotes plant growth directly by delivering the plant with substances synthesized by the bacteria or assisting the plant's absorption of soil nutrients, i.e., by phytohormone and siderophore formation, dissolution of mineral (P, Zn, K), and reducing ethylene levels in plants (Lugtenberg and Kamilova, 2009).…”

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confidence: 99%

Plant-beneficial Bacillus, Pseudomonas, and Staphylococcus spp. from Kumaon Himalayas and their drought tolerance response

Sati

Pande²,

Samant³

2023

Front. Sustain. Food Syst.

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Plant growth-promoting rhizobacteria (PGPR) have been shown to augment plant responses against drought and other abiotic stresses. In the present study, we isolated 27 bacteria from the rhizosphere of various plants cultivated in the Kumaon Himalayas., and to measure their abiotic stress tolerance, these 27 isolates were subjected to variations in pH, temperature, and drought. All 27 isolates were also screened for various plant growth-promoting traits. Among these, the four isolates RR1, ASC1, AFS3, and NG4 demonstrated various plant growth promotion activities including the synthesis of indole-3-acetic acid (IAA), siderophores, ammonia, and 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase production, and concomitantly high tolerance to abiotic stresses. Moreover, 16S rRNA sequencing of these four isolates validated their identities as Bacillus, Pseudomonas, and Staphylococcus sp. Finally, to assess the in-vivo drought tolerance potential of these four isolates, a pot-trial experiment was undertaken in wheat cultivar VL-892. The results demonstrated that inoculating wheat plants with these four PGPR isolates greatly improved plant growth under drought circumstances by increasing root and shoot length and both fresh and dry weight of root and shoot. This study endeavors to discover the biochemical and molecular diversity of cultivable PGPR in six remotely located districts of Uttarakhand. In conclusion, the drought-tolerant PGPR strains described in this study are plant-beneficial and can effectively mobilize nutrients under drought conditions. Consequently, they could be used as bioinoculants to alleviate drought stress in wheat plants, in a sustainable manner. To the best of our knowledge, this is the first report of exploring the diversity and characterization of PGPR from the Kumaon Himalayas and their drought evaluation.

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Toward an enhanced understanding of plant growth promoting microbes for sustainable agriculture

Cited by 11 publications

References 83 publications

Isolation, and Characterization of Indigenous Rhizobacteria from Wheat (Triticum aestivum L.) and Determining their Drought Tolerance

Isolation, and Characterization of Indigenous Rhizobacteria from Wheat (Triticum aestivum L.) and Determining their Drought Tolerance

Recent Advances in PGPR and Molecular Mechanisms Involved in Drought Stress Tolerance

Plant-beneficial Bacillus, Pseudomonas, and Staphylococcus spp. from Kumaon Himalayas and their drought tolerance response

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