Plant Growth Promoting Rhizobacteria (PGPR) as Green Bioinoculants: Recent Developments, Constraints, and Prospects

Sustainability, Journal Year: 2021, Volume and Issue: 13(3), P. 1140 - 1140

Published: Jan. 22, 2021

The quest for enhancing agricultural yields due to increased pressure on food production has inevitably led the indiscriminate use of chemical fertilizers and other agrochemicals. Biofertilizers are emerging as a suitable alternative counteract adverse environmental impacts exerted by synthetic facilitate overall growth yield crops in an eco-friendly manner. They contain living or dormant microbes, which applied soil used treating crop seeds. One foremost candidates this respect is rhizobacteria. Plant promoting rhizobacteria (PGPR) important cluster beneficial, root-colonizing bacteria thriving plant rhizosphere bulk soil. exhibit synergistic antagonistic interactions with microbiota engage array activities ecological significance. promote facilitating biotic abiotic stress tolerance support nutrition host plants. Due their active endorsing activities, PGPRs considered hazardous fertilizers. biofertilizers biological approach toward sustainable intensification agriculture. However, application increasing several pros cons. Application potential that perform well laboratory greenhouse conditions often fails deliver expected effects development field settings. Here we review different types PGPR-based biofertilizers, discuss challenges faced widespread adoption deliberate prospects using

Language: Английский

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ACC deaminase and antioxidant enzymes producing halophilic Enterobacter sp. PR14 promotes the growth of rice and millets under salinity stress

Physiology and Molecular Biology of Plants, Journal Year: 2020, Volume and Issue: 26(9), P. 1847 - 1854

Published: Aug. 9, 2020

Language: Английский

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Production, Purification, and Characterization of Bacillibactin Siderophore of Bacillus subtilis and Its Application for Improvement in Plant Growth and Oil Content in Sesame

Sustainability, Journal Year: 2021, Volume and Issue: 13(10), P. 5394 - 5394

Published: May 12, 2021

Siderophores are low molecular weight secondary metabolites produced by microorganisms under iron stress as a specific chelator. In the present study, rhizospheric bacterium was isolated from rhizosphere of sesame plants Salem district, Tamil Nadu, India and later identified Bacillus subtilis LSBS2. It exhibited multiple plant-growth-promoting (PGP) traits such hydrogen cyanide (HCN), ammonia, indole acetic acid (IAA), solubilized phosphate. The chrome azurol sulphonate (CAS) agar plate assay used to screen siderophore production LSBS2 quantitatively isolate 296 mg/L siderophores in succinic medium. Further characterization revealed that catecholate bacillibactin. A pot culture experiment explore effect its promoting absorption plant growth Sesamum indicum L. Data study multifarious sp. could be exploited potential bioinoculant for yield improvement S. indicum.

Language: Английский

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Production of Plant Beneficial and Antioxidants Metabolites by Klebsiellavariicola under Salinity Stress

Molecules, Journal Year: 2021, Volume and Issue: 26(7), P. 1894 - 1894

Published: March 26, 2021

Bacteria that surround plant roots and exert beneficial effects on growth are known as growth-promoting rhizobacteria (PGPR). In addition to the growth-promotion, PGPR also imparts resistance against salinity oxidative stress needs be studied. Such can function dynamic bioinoculants under conditions. The present study reports isolation of phytase positive multifarious Klebsiella variicola SURYA6 isolated from wheat rhizosphere in Kolhapur, India. isolate produced various (PGP), ameliorating, antioxidant traits. It organic acid, yielded a higher phosphorous solubilization index (9.3), maximum activity (376.67 ± 2.77 U/mL), copious amounts siderophore (79.0%). salt ameliorating traits such indole acetic acid (78.45 1.9 µg/mL), 1 aminocyclopropane-1-carboxylate deaminase (0.991 M/mg/h), exopolysaccharides (32.2 1.2 g/L). these, activities enzymes like superoxide dismutase (13.86 IU/mg protein), catalase (0.053 glutathione oxidase (22.12 µg/mg protein) at levels. exhibited optimum secretion these metabolites during log-phase growth. sensitivity wide range antibiotics did not produce hemolysis blood agar, indicative its non-pathogenic nature. potential K. PGP, make it bioinoculant for management.

Language: Английский

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Insight into Recent Progress and Perspectives in Improvement of Antioxidant Machinery upon PGPR Augmentation in Plants under Drought Stress: A Review

Antioxidants, Journal Year: 2022, Volume and Issue: 11(9), P. 1763 - 1763

Published: Sept. 7, 2022

Agriculture has a lot of responsibility as the rise in world's population demands more food requirements. However, than one type biotic and abiotic stress continually impacts agricultural productivity. Drought is major that significantly affects productivity every year plants undergo several morphological, biochemical, physiological modifications, such repressed root shoot growth, reduced photosynthesis transpiration rate, excessive production reactive oxygen species (ROS), osmotic adjustments, modified leaf senescence regulating signaling pathways. Such modifications may permanently damage plants; therefore, mitigation strategies must be developed. The use drought resistant crop cultivars expensive labor-intensive with few advantages. exploiting plant growth promoting rhizobacteria (PGPR) proven alternative numerous direct indirect PGPR confers induced systemic tolerance (IST) mechanisms response to via multiple mechanisms, including alteration architecture, maintenance high relative water content, improvement phytohormones, exopolysaccharides, ACC deaminase, carotenoids volatiles, induction antioxidant defense system, stress-responsive gene expression. commercial application bioinoculants or biostimulants will remain contingent on robust strain selection performance under unfavorable environmental conditions. This review highlights possible by activating adaptive systems for enhancing improving overall yield.

Language: Английский

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Plant Growth-Promoting Bacteria (PGPB) with Biofilm-Forming Ability: A Multifaceted Agent for Sustainable Agriculture

Diversity, Journal Year: 2023, Volume and Issue: 15(1), P. 112 - 112

Published: Jan. 13, 2023

Plant growth-promoting bacteria (PGPB) enhance plant growth, as well protect plants from several biotic and abiotic stresses through a variety of mechanisms. Therefore, the exploitation PGPB in agriculture is feasible it offers sustainable eco-friendly approaches to maintaining soil health while increasing crop productivity. The vital key application its effectiveness colonizing roots phyllosphere, developing protective umbrella formation microcolonies biofilms. Biofilms offer benefits PGPB, such enhancing resistance adverse environmental conditions, protecting against pathogens, improving acquisition nutrients released environment, facilitating beneficial bacteria–plant interactions. bacterial biofilms can successfully compete with other microorganisms found on surfaces. In addition, plant-associated are capable colonization sites, cycling nutrients, pathogen defenses, tolerance stresses, thereby agricultural productivity yields. This review highlights role surfaces strategies used by biofilm-forming PGPB. Moreover, factors influencing biofilm at root shoot interfaces critically discussed. will pave formulations addressing challenges related their efficacy competence for sustainability.

Language: Английский

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The role of plant-associated rhizobacteria in plant growth, biocontrol and abiotic stress management

Journal of Applied Microbiology, Journal Year: 2022, Volume and Issue: 133(5), P. 2717 - 2741

Published: Aug. 26, 2022

The rhizosphere is the region around plant roots where maximum microbial activities occur. In rhizosphere, microorganisms' beneficial and harmful affect growth development. mutualistic rhizospheric bacteria which improve health are known as growth-promoting rhizobacteria (PGPR). They very important due to their ability help in diverse ways. PGPR such Pseudomonas, Bacillus, Azospirillum, Azotobacter, Arthrobacter, Achromobacter, Micrococcus, Enterobacter, Rhizobium, Agrobacterium, Pantoea Serratia now well known. Rhizomicrobiome plays critical roles nutrient acquisition assimilation, improved soil texture, secreting modulating extracellular molecules hormones, secondary metabolites, antibiotics various signal compounds, all leading enhancement of microbes compounds they secrete constitute valuable biostimulants play pivotal stress responses. this review, we highlight diversity cutting-edge findings focusing on role a We also discussed resisting adverse effects arising from abiotic (drought, salinity, heat, heavy metals) stresses.

Language: Английский

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Halotolerant Rhizobacteria for Salinity-Stress Mitigation: Diversity, Mechanisms and Molecular Approaches

Sustainability, Journal Year: 2022, Volume and Issue: 14(1), P. 490 - 490

Published: Jan. 3, 2022

Agriculture is the best foundation for human livelihoods, and, in this respect, crop production has been forced to adopt sustainable farming practices. However, soil salinity severely affects growth, degradation of quality, and fertility many countries world. This results loss profitability, growth agricultural yields, step-by-step decline nutrient content. Thus, researchers have focused on searching halotolerant plant growth-promoting bacteria (PGPB) increase productivity. The beneficial are frequently connected with rhizosphere can alleviate under stress through direct or indirect mechanisms. In context, PGPB attained a unique position. responses include an increased rate photosynthesis, high antioxidants, osmolyte accumulation, decreased Na+ ions, maintenance water balance, germination rate, well-developed root shoot elongation salt-stress conditions. Therefore, use as bioformulations emerging research avenue last few years, applications biopesticides biofertilizers being considered alternative tools agriculture, they ecofriendly minimize all kinds stresses. Halotolerant possess greater potential salinity-affected bioinoculants bioremediation salt-affected soil.

Language: Английский

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Microbial Remediation: A Promising Tool for Reclamation of Contaminated Sites with Special Emphasis on Heavy Metal and Pesticide Pollution: A Review

Processes, Journal Year: 2022, Volume and Issue: 10(7), P. 1358 - 1358

Published: July 12, 2022

Heavy metal and pesticide pollution have become an inevitable part of the modern industrialized environment that find their way into all ecosystems. Because persistent nature, recalcitrance, high toxicity biological enrichment, has threatened stability as well health living beings. Due to environmental persistence heavy metals pesticides, they get accumulated in environs consequently lead food chain contamination. Therefore, remediation contaminations needs be addressed a priority. Various physico-chemical approaches been employed for this purpose, but significant drawbacks such expenses, labor, alteration soil properties, disruption native microflora generation toxic by-products. Researchers worldwide are focusing on bioremediation strategies overcome multifaceted problem, i.e., removal, immobilization detoxification pesticides metals, most efficient cost-effective ways. For period millions evolutionary years, microorganisms resistant intoxicants developed capability remediate ions result, helped restoration natural state degraded with long term benefits. Keeping view concerns imposed by our society, we aimed present generalized picture capacity microorganisms. We explore use bacteria, fungi, algae genetically engineered microbes both pesticides. This review summarizes major pathways technologies; addition that, brief account is given molecular systemic biology, gene editing omics enhanced process widened its microbiological techniques toward

Language: Английский

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PGPR: the treasure of multifarious beneficial microorganisms for nutrient mobilization, pest biocontrol and plant growth promotion in field crops

World Journal of Microbiology and Biotechnology, Journal Year: 2023, Volume and Issue: 39(4)

Published: Feb. 16, 2023

Language: Английский

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