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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Biofertilizers: An ecofriendly technology for nutrient recycling and environmental sustainability

Current Research in Microbial Sciences, Journal Year: 2021, Volume and Issue: 3, P. 100094 - 100094

Published: Dec. 20, 2021

Modern intensive agricultural practices face numerous challenges that pose major threats to global food security. In order address the nutritional requirements of ever-increasing world population, chemical fertilizers and pesticides are applied on large scale increase crop production. However, injudicious use agrochemicals has resulted in environmental pollution leading public health hazards. Moreover, agriculture soils continuously losing their quality physical properties as well (imbalance nutrients) biological health. Plant-associated microbes with plant growth- promoting traits have enormous potential solve these play a crucial role enhancing biomass yield. The beneficial mechanisms growth improvement include enhanced nutrient availability, phytohormone modulation, biocontrol phytopathogens amelioration biotic abiotic stresses. Solid-based or liquid bioinoculant formulation comprises inoculum preparation, addition cell protectants such glycerol, lactose, starch, good carrier material, proper packaging best delivery methods. Recent developments entrapment/microencapsulation, nano-immobilization microbial bioinoculants biofilm-based biofertilizers. This review critically examines current state-of-art strains biofertilizers important roles performed by maintaining soil fertility productivity.

Language: Английский

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Microbes as Biofertilizers, a Potential Approach for Sustainable Crop Production

Sustainability, Journal Year: 2021, Volume and Issue: 13(4), P. 1868 - 1868

Published: Feb. 9, 2021

Continuous decline of earth’s natural resources and increased use hazardous chemical fertilizers pose a great concern for the future agriculture. Biofertilizers are promising alternative to gaining importance attaining sustainable play key role in increasing crop yield maintaining long-term soil fertility, which is essential meeting global food demand. Microbes can interact with plants enhance their immunity, growth, development. Nitrogen, phosphorous, potassium, zinc, silica nutrients required proper growth crops, but these naturally present insolubilized or complex forms. Certain microorganisms render them soluble make available plants. The potential microbes, mode action, along effect on discussed this review. Biofertilizers, being cost effective, non-toxic, eco-friendly, serve as good substitute expensive harmful fertilizers. knowledge gained from review help us understand microbes agriculture ways formulate biofertilizers production.

Language: Английский

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The Role of Plant Growth-Promoting Rhizobacteria (PGPR) in Mitigating Plant’s Environmental Stresses

Applied Sciences, Journal Year: 2022, Volume and Issue: 12(3), P. 1231 - 1231

Published: Jan. 25, 2022

Phytoremediation is a cost-effective and sustainable technology used to clean up pollutants from soils waters through the use of plant species. Indeed, plants are naturally capable absorbing metals degrading organic molecules. However, in several cases, presence contaminants causes suffering limited growth. In such situations, thanks production specific root exudates, can engage most suitable bacteria able support their growth according particular environmental stress. These growth-promoting rhizobacteria (PGPR) may facilitate development with beneficial effects, even more evident when grown critical conditions, as toxic contaminants. For instance, PGPR alleviate metal phytotoxicity by altering bioavailability soil increasing translocation within plant. Since many also hydrocarbon oxidizers, they enhance biodegradation activity. Besides, agriculture be an excellent counter devastating effects abiotic stress, excessive salinity drought, replacing expensive inorganic fertilizers that hurt environment. A better in-depth understanding function interactions associated microorganisms directly matrix interest, especially persistent contamination, could provide new opportunities for phytoremediation.

Language: Английский

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Bacterial Exopolysaccharides: Insight into Their Role in Plant Abiotic Stress Tolerance

Journal of Microbiology and Biotechnology, Journal Year: 2021, Volume and Issue: 31(8), P. 1045 - 1059

Published: July 5, 2021

Language: Английский

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Co-inoculation of rhizobacteria promotes growth, yield, and nutrient contents in soybean and improves soil enzymes and nutrients under drought conditions

Scientific Reports, Journal Year: 2021, Volume and Issue: 11(1)

Published: Nov. 11, 2021

Abstract Drought stress is the major abiotic factor limiting crop production. Co-inoculating crops with nitrogen fixing bacteria and plant growth-promoting rhizobacteria (PGPR) improves growth increases drought tolerance in arid or semiarid areas. Soybean a source of high-quality protein oil for humans. It susceptible to conditions. The co-inoculation drought-stressed soybean nodulating rhizobia root-colonizing, PGPR root shoot growth, formation nodules, fixation capacity soybean. present study was aimed observe if ( Glycine max L. (Merr.) Bradyrhizobium japonicum USDA110 Pseudomonas putida NUU8 can enhance tolerance, nodulation, nutrient uptake under results showed that B. P. gave more benefits nodulation compared plants inoculated alone uninoculated control. Under conditions, USDA 110 significantly enhanced length by 56%, 33%, dry weight 47%, 48%, nodule number 17% control drought-stressed. Co-inoculation , soil nutrients enzymes normal synergistic use suggested these strains could be used formulate consortium biofertilizers sustainable production field

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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Efforts towards overcoming drought stress in crops: Revisiting the mechanisms employed by plant growth-promoting bacteria

Frontiers in Microbiology, Journal Year: 2022, Volume and Issue: 13

Published: July 29, 2022

Globally, agriculture is under a lot of pressure due to rising population and corresponding increases in food demand. However, several variables, including improper mechanization, limited arable land, the presence biotic abiotic pressures, continually impact agricultural productivity. Drought notable destructive stress may be most serious challenge confronting sustainable agriculture, resulting significant crop output deficiency. Numerous morphological physiological changes occur plants as result drought stress. Hence, there need create mitigation techniques since these might permanently harm plant. Current methods used reduce effects include use film farming, super-absorbent hydrogels, nanoparticles, biochar, drought-resistant plant cultivars. activities are money labor-intensive, which offer improvement. The plant-growth-promoting bacteria (PGPB) has proven preferred method that offers indirect direct advantages mitigation. PGPB critical biological elements have favorable impacts on plants’ biochemical features, leading improved sugar production, relative water content, leaf number, ascorbic acid levels, photosynthetic pigment quantities. This present review revisited ameliorating detrimental plants, explored mechanism action employed, well major challenges encountered their application for growth development.

Language: Английский

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Toxicity assessment of microplastic (MPs); a threat to the ecosystem

Environmental Research, Journal Year: 2023, Volume and Issue: 234, P. 116523 - 116523

Published: July 6, 2023

Language: Английский

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