Rhizosphere Engineering With Plant Growth-Promoting Microorganisms for Agriculture and Ecological Sustainability

Frontiers in Sustainable Food Systems, Journal Year: 2021, Volume and Issue: 5

Published: Feb. 15, 2021

The rhizosphere is undoubtedly the most complex microhabitat, comprised of an integrated network plant roots, soil, and a diverse consortium bacteria, fungi, eukaryotes, archaea. conditions have direct impact on crop growth yield. Nutrient-rich environments stimulate yield vice versa. Extensive cultivation exhaust soils which need to be nurtured before or during next crop. Chemical fertilizers are major source nutrients but their uncontrolled widespread usage has posed serious threat sustainability agriculture stability ecosystem. These chemicals accumulated in drained water, emitted air where they persist for decades causing overall Plant growth-promoting rhizobacteria (PGPR) present convert many plant-unavailable essential e.g., nitrogen, phosphorous, zinc, etc. into available forms. PGPR produces certain hormones (such as auxin, cytokinin, gibberellin), cell lytic enzymes (chitinase, protease, hydrolases, etc.), secondary metabolites, antibiotics, stress alleviating compounds (e.g., 1-Aminocyclopropane-1- carboxylate deaminase), chelating agents (siderophores), some signaling N-Acyl homoserine lactones) interact with beneficial pathogenic counterparts rhizosphere. multifarious activities improve soil structure, health, fertility, functioning directly indirectly support under normal stressed environments. Rhizosphere engineering these wide-ranging application not only fertilization developing eco-friendly sustainable agriculture. Due severe climate change effects plants biology, there growing interest stress-resilient PGPM subsequent induce (drought, salinity, heat) tolerance mechanism plants. This review describes three components explicit focus broader perspective that could facilitate selected hosts serve efficient component

Language: Английский

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PGPR Mediated Alterations in Root Traits: Way Toward Sustainable Crop Production

Frontiers in Sustainable Food Systems, Journal Year: 2021, Volume and Issue: 4

Published: Jan. 8, 2021

The above ground growth of the plant is highly dependent on belowground root system. Rhizosphere zone continuous interplay between roots and soil microbial communities. Plants, through exudates, attract rhizosphere microorganisms to colonize surface internal tissues. Many these known as promoting rhizobacteria (PGPR) improve several direct indirect mechanisms including biological nitrogen fixation, nutrient solubilization, disease-control. PGPR, by producing phytohormones, volatile organic compounds, secondary metabolites play important role in influencing architecture growth, resulting increased area for exchange other effects. PGPR also resource use efficiency system improving functioning at physiological levels. mediated trait alterations can contribute agroecosystem crop stand, efficiency, stress tolerance, structure etc. Thus, capable modulating traits agricultural sustainability be used a primary criterion selection potential strains. Available studies emphasize morphological assess effect PGPR. However, influenced various external factors may give varying results. Therefore, it understand pathways genes involved signals/metabolites that intercept and/or intersect traits. advanced tools technologies help decipher determinants affecting Further identification based determinants/signaling molecules regulating open up new avenues research. present review updates recent knowledge influence functional its benefits agro-ecosystem. Efforts have been made bacterial signals/determinants regulatory expression their prospects sustainable agriculture. will helpful providing future directions researchers working functioning.

Language: Английский

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Microorganisms in Plant Growth and Development: Roles in Abiotic Stress Tolerance and Secondary Metabolites Secretion

Microorganisms, Journal Year: 2022, Volume and Issue: 10(8), P. 1528 - 1528

Published: July 28, 2022

Crops aimed at feeding an exponentially growing population are often exposed to a variety of harsh environmental factors. Although plants have evolved ways adjusting their metabolism and some also been engineered tolerate stressful environments, there is still shortage food supply. An alternative approach explore the possibility using rhizosphere microorganisms in mitigation abiotic stress hopefully improve production. Several studies shown that rhizobacteria mycorrhizae organisms can help tolerance by enhancing plant growth; stimulating production phytohormones, siderophores, solubilizing phosphates; lowering ethylene levels; upregulating expression dehydration response antioxidant genes. This article shows secretion secondary metabolites as additional mechanism employed against stress. The understanding these mechanisms will efficacy plant-growth-promoting microorganisms.

Language: Английский

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Plant Associated Rhizobacteria for Biocontrol and Plant Growth Enhancement

Frontiers in Plant Science, Journal Year: 2021, Volume and Issue: 12

Published: March 17, 2021

Crop disease remains a major problem to global food production. Excess use of pesticides through chemical control measures is serious for sustainable agriculture as we struggle higher crop productivity. The plant growth promoting rhizobacteria (PGPR) proven environment friendly way controlling and increasing yield. PGPR suppress diseases by directly synthesizing pathogen-antagonizing compounds, well triggering immune responses. It possible identify develop that both more stimulate growth, bringing dual benefit. A number have been registered commercial under greenhouse field conditions large strains identified proved effective biocontrol agents (BCAs) environmentally controlled conditions. However, there are still challenges before registration, large-scale application, adoption the pest management. Successful BCAs provide strong theoretical practical support application in production, which ensures feasibility efficacy horticulture This could be pave widespread agriculture, including conditions, assist with management climate change

Language: Английский

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Amelioration of drought stress in Foxtail millet (Setaria italica L.) by P-solubilizing drought-tolerant microbes with multifarious plant growth promoting attributes

Environmental Sustainability, Journal Year: 2020, Volume and Issue: 3(1), P. 23 - 34

Published: Jan. 31, 2020

Language: Английский

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Microbe-mediated alleviation of drought stress and acquisition of phosphorus in great millet (Sorghum bicolour L.) by drought-adaptive and phosphorus-solubilizing microbes

Biocatalysis and Agricultural Biotechnology, Journal Year: 2020, Volume and Issue: 23, P. 101501 - 101501

Published: Jan. 1, 2020

Language: Английский

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Drought-tolerant Bacillus megaterium isolated from semi-arid conditions induces systemic tolerance of wheat under drought conditions

Plant Cell Reports, Journal Year: 2021, Volume and Issue: 41(3), P. 549 - 569

Published: Jan. 7, 2021

Language: Английский

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Biodiversity, and biotechnological contribution of beneficial soil microbiomes for nutrient cycling, plant growth improvement and nutrient uptake

Biocatalysis and Agricultural Biotechnology, Journal Year: 2021, Volume and Issue: 33, P. 102009 - 102009

Published: April 24, 2021

Language: Английский

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The Potential Role of Microbial Biostimulants in the Amelioration of Climate Change-Associated Abiotic Stresses on Crops

Frontiers in Microbiology, Journal Year: 2022, Volume and Issue: 12

Published: Jan. 14, 2022

Crop plants are more often exposed to abiotic stresses in the current age of fast-evolving climate change. This includes exposure extreme and unpredictable changes climatic conditions, phytosanitary hazards, cultivation which results drastic losses worldwide agricultural productions. Plants coexist with microbial symbionts, some play key roles ecosystem plant processes. The application biostimulants, take advantage symbiotic relationships, is a long-term strategy for improving productivity performance, even face change-associated stresses. Beneficial filamentous fungi, yeasts, bacteria examples can boost growth, yield, nutrition stress tolerance plants. paper highlights recent information about role biostimulants their potential mitigating occurring on crop due A critical evaluation efficient use under diverse conditions also made. Currently, accessible products generally improve cultural but action mechanisms mostly unknown, benefits frequently inconsistent. Thus, further studies that could lead precisely targeted discussed.

Language: Английский

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Unlocking the strength of plant growth promoting Pseudomonas in improving crop productivity in normal and challenging environments: a review

Journal of Plant Interactions, Journal Year: 2022, Volume and Issue: 17(1), P. 220 - 238

Published: Feb. 7, 2022

The widespread use of biofertilizers, rather than chemical fertilizers, is significantly more likely to accomplish sustainable agriculture production globally. Plant growth-promoting rhizobacteria (PGPR) are chemical-free alternatives conventional crop protection in agriculture. Pseudomonas spp. unique among the PGPR genera terms root colonization, nitrogen fixation, exopolysaccharides, siderophores, hydrogen cyanide (HCN), and phytohormones, solubilization phosphorus, potassium, zinc, biofilm formation, antioxidant activities, stress adaptation abilities, positive interactions with other microbial communities. They also aid plant development by promoting biotic abiotic tolerance, as well supporting host nutrition. regarded an environmentally acceptable alternative harmful fertilizers because its active actions. However, achieve this goal, workers must first get a complete understanding numerous processes used Pseudomonas, allowing them fully exploit bacteria potential future. Therefore, present review has been undertaken discuss fundamental promote reduce environmental stresses. In addition, we described some reported Pseudomonas-based biofertilizers worldwide presence genes genome different strains understand mechanism mediated growth promotion at molecular level.

Language: Английский

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