Halo-tolerant plant growth promoting rhizobacteria for improving productivity and remediation of saline soils

Journal of Advanced Research, Journal Year: 2020, Volume and Issue: 26, P. 69 - 82

Published: July 11, 2020

The collective impact of climate change and soil salinity is continuously increasing the degraded lands across globe, bringing agricultural productivity food security under stress. high concentration salts in saline soils impose osmotic, ionic, oxidative water stress plants. Biological solutions can be most reliable sustainable approach to ensure limit use agro-chemicals.Halo-tolerant plant growth promoting rhizobacteria (HT-PGPR) are emerging as efficient biological tools mitigate toxic effects salt concentrations improve plants, simultaneously remediating soils. review explains role HT-PGPR mitigating plants through diverse mechanisms concurrently leading improvement quality.HT-PGPR involved alleviating a number evoking multipronged physiological, biochemical molecular responses. These include changes expression defense-related proteins, exopolysaccharides synthesis, activation antioxidant machinery, accumulation osmolytes, maintaining Na+ kinetics improving levels phytohormones nutrient uptake modification signaling by inoculation conditions elicits induced systemic resistance which further prepares them against microbial-mechanisms structural compositional improvements also important. Development novel bioinoculants for based on concepts presented affected agro-ecosystems them.

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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Mechanistic Insights of Plant Growth Promoting Bacteria Mediated Drought and Salt Stress Tolerance in Plants for Sustainable Agriculture

International Journal of Molecular Sciences, Journal Year: 2022, Volume and Issue: 23(7), P. 3741 - 3741

Published: March 29, 2022

Climate change has devastating effects on plant growth and yield. During ontogenesis, plants are subjected to a variety of abiotic stresses, including drought salinity, affecting the crop loss (20–50%) making them vulnerable in terms survival. These stresses lead excessive production reactive oxygen species (ROS) that damage nucleic acid, proteins, lipids. Plant growth-promoting bacteria (PGPB) have remarkable capabilities combating salinity stress improving growth, which enhances productivity contributes food security. PGPB inoculation under promotes through several modes actions, such as phytohormones, 1-aminocyclopropane-1-carboxylic acid deaminase, exopolysaccharide, siderophore, hydrogen cyanide, extracellular polymeric substances, volatile organic compounds, modulate antioxidants defense machinery, abscisic thereby preventing oxidative stress. also provide osmotic balance; maintain ion homeostasis; induce salt-responsive genes, metabolic reprogramming, transcriptional changes transporter etc. Therefore, this review, we summarize mitigate its detrimental effects. Furthermore, discuss mechanistic insights towards tolerance for sustainable agriculture.

Language: Английский

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Plant Growth-Promoting Bacteria as Bioinoculants: Attributes and Challenges for Sustainable Crop Improvement

Agronomy, Journal Year: 2021, Volume and Issue: 11(6), P. 1167 - 1167

Published: June 8, 2021

Plant growth-promoting bacteria (PGPB) are excellent biocontrol agents and stimulators of plant growth, nutrition, production. Therefore, these plant-associated considered an alternative to reduce or eliminate the use toxic agrochemicals. In this work, we review current state beneficial mechanisms (direct indirect), including production antibiotic compounds enzymes, facilitation resource acquisition, stimulating phytohormones/metabolites. Some aspects formulation technology bioinoculant efficiency diverse PGPBs (e.g., rhizobacteria, phyllobacteria endophytic bacteria) in field also discussed. However, commercialization application biological agriculture occur mainly developed countries, limiting their success developing regions. The possible causes delay bioinoculants for sustainable plausible solutions discussed study. Finally, is currently a priority agriculture.

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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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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New opportunities in plant microbiome engineering for increasing agricultural sustainability under stressful conditions

Frontiers in Plant Science, Journal Year: 2022, Volume and Issue: 13

Published: Sept. 15, 2022

Plant microbiome (or phytomicrobiome) engineering (PME) is an anticipated untapped alternative strategy that could be exploited for plant growth, health and productivity under different environmental conditions. It has been proven the phytomicrobiome crucial contributions to health, pathogen control tolerance drastic (a)biotic constraints. Consistent with safety, in this article we address fundamental role of its insights productivity. We also explore potential restrictions proposition improving microbial functions can supportive better growth production. Understanding associated communities, propose how actions enhanced improve growth-promoting mechanisms, a particular emphasis on beneficial fungi. Additionally, suggest possible strategies adapt harsh environment by manipulating microbiomes. However, our current understanding still infancy, major perturbations, such as anthropocentric actions, are not fully understood. Therefore, work highlights importance create more sustainable agriculture, particularly stressors.

Language: Английский

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Plant Growth-Promoting Rhizobacteria (PGPR): A Rampart against the Adverse Effects of Drought Stress

Water, Journal Year: 2023, Volume and Issue: 15(3), P. 418 - 418

Published: Jan. 19, 2023

Abiotic stress significantly limits plant growth and production. Drought, in particular, is a severe constraint that affects agricultural productivity on global scale. Water induces plants set of morpho-anatomical (modification root leaf structure), physiological, biochemical (relative water content, membrane stability, photosynthesis, hormonal balance, antioxidant systems, osmolyte accumulation) changes mainly employed to cope with the drought stress. These strategies allow overcome unfavorable period limited availability. Currently, promising alternative available improve tolerance under conditions. The use osmotolerant growth-promoting rhizobacteria (PGPR) as inoculants can alleviate by increasing efficiency plant. PGPR drought, through morphology architecture system, production phytohormones, extracellular polysaccharides, ACC 1-(aminocyclopropane-1-carboxylate) deaminase, volatile chemicals, accumulation. They may also enhance defense system induce transcriptional regulation response genes. This review addresses effects growth, adaptation, conditions discusses significant potential modulate physiological against scarcity, ensuring survival improving resistance crops.

Language: Английский

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Advancing environmental sustainability through microbial reprogramming in growth improvement, stress alleviation, and phytoremediation

Plant Stress, Journal Year: 2023, Volume and Issue: 10, P. 100283 - 100283

Published: Nov. 7, 2023

The substantial influence of microbes on crop growth, stress resilience, and ecological restoration has generated considerable interest due to the intricate interplay between these microorganisms plants. This study comprehensively examines diverse mechanisms through which contribute plant well-being, mitigate stress, facilitate phytoremediation processes. Microorganisms encompassing bacteria, fungi, archaea, viruses, have demonstrated their knack for stirring up growth-enabling hormones, activating pathways tuned ameliorating availability nutrients by means fixation solubilization Furthermore, such also display immense potential in field strategies aiding plants extraction, alteration, detoxification contaminants found both soil water. Complementing this, enable phytoextraction, rhizofiltration, phytostabilization, rhizodegradation, owing harmonious interaction with purification tainted environments. However, it is critical address legal issues, moral dilemmas, unintended consequences as are increasingly incorporated into sustainable agriculture methods. Optimizing microbial therapies ensuring appropriate use offers promising insights when leveraging cutting-edge technologies like omics genetic engineering. Coordination among academics, practitioners, policymakers still crucial quest a more robust peaceful coexistence microbes, plants, ecosystems. In nutshell, this work highlights pivotal role that poised assume, guiding trajectory agriculture, alleviating fostering environmental sustainability far-reaching implications.

Language: Английский

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Mechanisms and Applications of Bacterial Inoculants in Plant Drought Stress Tolerance

Microorganisms, Journal Year: 2023, Volume and Issue: 11(2), P. 502 - 502

Published: Feb. 17, 2023

Agricultural systems are highly affected by climatic factors such as temperature, rain, humidity, wind, and solar radiation, so the climate its changes major risk for agricultural activities. A small portion of areas Brazil is irrigated, while vast majority directly depends on natural variations rains. The increase in temperatures due to change will lead increased water consumption farmers a reduction availability, putting production capacity at risk. Drought limiting environmental factor plant growth one phenomena that most affects productivity. response plants stress complex involves coordination between gene expression integration with hormones. Studies suggest bacteria have mechanisms mitigate effects promote more significant these species. underlined mechanism root-to-shoot phenotypic rate, architecture, hydraulic conductivity, conservation, cell protection, damage restoration through integrating phytohormones modulation, stress-induced enzymatic apparatus, metabolites. Thus, this review aims demonstrate how growth-promoting could negative responses exposed provide examples technological conversion applied agroecosystems.

Language: Английский

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