Impact of plant growth-promoting rhizobacteria (PGPR) on plant nutrition and root characteristics: Current perspective

Plant Stress, Journal Year: 2023, Volume and Issue: 11, P. 100341 - 100341

Published: Dec. 28, 2023

Through a variety of mechanisms, including increasing the amount readily available mineral nutrients, regulating phytohormone levels, and biocontrol phytopathogens, plant growth-promoting rhizobacteria (PGPR) associated with rhizosphere either directly or indirectly stimulates growth development. The establishment, survival, persistence PGPR inoculants are widely acknowledged to be contingent upon these two parameters, in addition intricate network interactions within rhizosphere. In general, soil is moist environment significant amounts carbon that have been degraded harbors large population microbes. rhizo-microbiome crucial agriculture because wide root exudates cell debris attract unique distinct patterns microbial colonization. plays role manufacture regulation extracellular molecules, hormones, secondary metabolites, antibiotics, various signaling chemicals. Additionally, composition influences texture enhancement. Research has shown can used treat plants inoculate promote alters physiology entire plant, which enhances nutrient uptake affects effectiveness activity. specific biochemical processes involved this phenomenon often not well understood. Nevertheless, new studies shed light on mechanisms via by induce responses, both at local systemic levels. Insufficient information regarding impact mechanism molecules metabolic pathways characteristics. Consequently, review will concentrate elucidating identifying essential exert influence root-microbe interactions.

Language: Английский

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Biosynthetic Pathways and Functions of Indole-3-Acetic Acid in Microorganisms

Microorganisms, Journal Year: 2023, Volume and Issue: 11(8), P. 2077 - 2077

Published: Aug. 12, 2023

Indole-3-acetic acid (IAA) belongs to the family of auxin indole derivatives. IAA regulates almost all aspects plant growth and development, is one most important hormones. In microorganisms too, plays an role in growth, even interaction. Therefore, mechanism studies on biosynthesis functions can promote production utilization agriculture. This mini-review mainly summarizes pathways that have been reported microorganisms, including indole-3-acetamide pathway, indole-3-pyruvate tryptamine indole-3-acetonitrile tryptophan side chain oxidase non-tryptophan dependent pathway. Some interact with each other through common key genes constitute a network biosynthesis. addition, functional divided into three categories, also summarized: effects virulence plants, beneficial impacts plants.

Language: Английский

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Serratia spp. as plant growth-promoting bacteria alleviating salinity, drought, and nutrient imbalance stresses

Frontiers in Microbiology, Journal Year: 2024, Volume and Issue: 15

Published: March 18, 2024

In agricultural environments, plants are often exposed to abiotic stresses including temperature extremes, salt stress, drought, and heavy metal soil contamination, which leads significant economic losses worldwide. Especially stress drought pose serious challenges since they induce ionic toxicity, osmotic oxidative in plants. A potential solution can be the application of bacteria Serratia spp. known promote plant growth under normal conditions Thus mini-review aims summarize current knowledge on promotion by (under salinity nutrient deficit) highlight areas for development field. So far, it has been proven that strains exhibit a variety traits contributing enhanced tolerance, such as phytohormone production, ACC deaminase activity, nitrogen fixation, P Zn solubilization, antioxidant properties improvement, modulation gene expression. Nevertheless, further research is needed, especially two subjects: elucidating its mechanisms action at molecular level effects indigenous microbiota and, particularly, rhizosphere. both cases, advisable use omics techniques gain in-depth insights into issues. Additionally, some may phytopathogens, therefore studies rule out this possibility recommended prior field trials. It believed improving said stimulate will increase from genus serve an eco-friendly biofertilizer sustainable agriculture more often.

Language: Английский

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Signal communication during microbial modulation of root system architecture

Journal of Experimental Botany, Journal Year: 2023, Volume and Issue: 75(2), P. 526 - 537

Published: July 8, 2023

Abstract Every living organism on Earth depends its interactions with other organisms. In the rhizosphere, plants and microorganisms constantly exchange signals influence each other’s behavior. Recent studies have shown that many beneficial rhizosphere microbes can produce specific signaling molecules affect plant root architecture therefore could substantial effects above-ground growth. This review examines these chemical summarizes their mechanisms of action, aim enhancing our understanding plant–microbe providing references for comprehensive development utilization active components in agricultural production. addition, we highlight future research directions challenges, such as searching microbial to induce primary development.

Language: Английский

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Trichoderma-secreted anthranilic acid promotes lateral root development via auxin signaling and RBOHF-induced endodermal cell wall remodeling

Cell Reports, Journal Year: 2024, Volume and Issue: 43(4), P. 114030 - 114030

Published: March 28, 2024

Trichoderma spp. have evolved the capacity to communicate with plants by producing various secondary metabolites (SMs). Nonhormonal SMs play important roles in plant root development, while specific from rhizosphere microbes and their underlying mechanisms control branching are still largely unknown. In this study, a compound, anthranilic acid (2-AA), is identified T. guizhouense NJAU4742 promote lateral development. Further studies demonstrate that 2-AA positively regulates auxin signaling transport canonical pathway. also partly rescues numbers of CASP1

Language: Английский

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PGPR: Key to Enhancing Crop Productivity and Achieving Sustainable Agriculture

Current Microbiology, Journal Year: 2024, Volume and Issue: 81(11)

Published: Sept. 26, 2024

Language: Английский

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B. subtilisCNBG‐PGPR‐1 induces methionine to regulate ethylene pathway and ROS scavenging for improving salt tolerance of tomato

The Plant Journal, Journal Year: 2023, Volume and Issue: 117(1), P. 193 - 211

Published: Oct. 9, 2023

SUMMARY Soil salinity severely threatens plant growth and crop yields. The utilization of PGPR is an effective strategy for enhancing salt tolerance, but the mechanisms involved in this process have rarely been reported. In study, we investigated effects Bacillus subtilis CNBG‐PGPR‐1 on improving tolerance elucidated molecular pathways involved. results showed that significantly improved cellular homeostasis photosynthetic efficiency leaves reduced ion toxicity osmotic stress caused by tomato. Transcriptome analysis uncovered enhanced through activation complex pathways, with hormone signal transduction playing important role. Comparative pharmacological experiments confirmed ethylene pathway was closely related to beneficial effect tolerance. Furthermore, found methionine, a precursor synthesis, accumulated response Exogenous L‐methionine largely mimicked activated expression pathway‐related genes, indicating induces methionine accumulation regulate Finally, salt‐induced ROS activating scavenger‐encoding mainly GSH metabolism POD‐related which were also linked metabolism. Overall, our studies demonstrate CNBG‐PGPR‐1‐induced key regulator scavenging, providing novel understanding mechanism microbes improve

Language: Английский

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Green manure increases peanut production by shaping the rhizosphere bacterial community and regulating soil metabolites under continuous peanut production systems

BMC Plant Biology, Journal Year: 2023, Volume and Issue: 23(1)

Published: Feb. 1, 2023

Green manure (GM) is a crop commonly grown during fallow periods, which has been applied in agriculture as strategy to regulate nutrient cycling, improve organic matter, and enhance soil microbial biodiversity, but date, few studies have examined the effects of GM treatments on rhizosphere bacterial community metabolites from continuous cropping peanut field.In this study, we found that abundances several functionally significant groups containing Actinobacteria, Acidobacteria, genus Sphingomonas, are associated with nitrogen were dramatically increased GM-applied soils. Consistent results, metabolomics analysis revealed strong perturbation nitrogen- or carbon-related metabolisms The substantially up-regulated beneficial including sucrose, adenine, lysophosphatidylcholine (LPC), malic acid, betaines soils may contribute overcome obstacle. In contrast cropping, planting winter wheat oilseed rape period under spring production systems evidently improved quality, concomitantly raised pod yield by 32.93% 25.20%, 2020 season, respectively.GMs application an effective obstacle improving metabolites, rhizobacterial properties.

Language: Английский

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Integrated physiological, biochemical and transcriptomic analyses reveal the mechanism of salt tolerance induced by a halotolerant Serratia sp. NTN6 in maize

Environmental and Experimental Botany, Journal Year: 2024, Volume and Issue: 221, P. 105724 - 105724

Published: March 7, 2024

Language: Английский

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Potential of endophytic bacteria from Acacia mearnsii: Phosphate solubilization, indole acetic acid production, and application in wheat

Applied Soil Ecology, Journal Year: 2024, Volume and Issue: 196, P. 105315 - 105315

Published: Feb. 2, 2024

Language: Английский

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