Plant-associated Bacillus and Pseudomonas antimicrobial activities in plant disease suppression via biological control mechanisms - A review

Physiological and Molecular Plant Pathology, Journal Year: 2021, Volume and Issue: 117, P. 101754 - 101754

Published: Nov. 26, 2021

Language: Английский

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Evaluation of plant growth promotion properties and induction of antioxidative defense mechanism by tea rhizobacteria of Darjeeling, India

Scientific Reports, Journal Year: 2020, Volume and Issue: 10(1)

Published: Sept. 23, 2020

Abstract A total of 120 rhizobacteria were isolated from seven different tea estates Darjeeling, West Bengal, India. Based on a functional screening in vitro plant growth-promoting (PGP) activities, thirty potential rhizobacterial isolates selected for in-planta evaluation PGP activities rice and maize crops. All the identified using partial 16S rRNA gene sequencing. Out rhizobacteria, sixteen (53.3%) belong to genus Bacillus, five (16.6%) represent Staphylococcus, three (10%) Ochrobactrum, one (3.3%) isolate each belongs genera Pseudomonas, Lysinibacillus, Micrococcus, Leifsonia, Exiguobacterium, Arthrobacter. Treatment seedlings with these resulted growth promotion. Besides, treatment triggered enzymatic [ascorbate peroxidase (APX), catalase (CAT), chitinase, phenylalanine ammonia-lyase (PAL)], non-enzymatic [proline polyphenolics] antioxidative defense reactions indicating their possible role reduction reactive oxygen species (ROS) burden thereby priming plants towards stress mitigation. To understand such possibility, we tested effect consortia biotic tolerance against necrotrophic fungi, Rhizoctonia solani AG1-IA. Our results indicated that pretreatment increased resistance common foliar pathogen like R . This study supports idea application sustainable crop practice through management under field conditions.

Language: Английский

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Bacillus subtilisimpact on plant growth, soil health and environment: Dr. Jekyll and Mr. Hyde

Journal of Applied Microbiology, Journal Year: 2022, Volume and Issue: 132(5), P. 3543 - 3562

Published: Feb. 9, 2022

Abstract The increased dependence of farmers on chemical fertilizers poses a risk to soil fertility and ecosystem stability. Plant growth-promoting rhizobacteria (PGPR) are at the forefront sustainable agriculture, providing multiple benefits for enhancement crop production health. Bacillus subtilis is common PGPR in that plays key role conferring biotic abiotic stress tolerance plants by induced systemic resistance (ISR), biofilm formation lipopeptide production. As part bioremediating technologies, spp. can purify metal contaminated soil. It acts as potent denitrifying agent agroecosystems while improving carbon sequestration process when applied regulated concentration. Although it harbours several antibiotic genes (ARGs), reduce horizontal transfer ARGs during manure composting modifying genetic makeup existing microbiota. In some instances, affects beneficial microbes rhizosphere. External inoculation B. has both positive negative impacts endophytic semi-synthetic microbial community. Soil texture, type, pH bacterial concentration play crucial regulation all these processes. amendments consortia produced engineering could be used lessen effect diversity. complex plant–microbe interactions decoded using transcriptomics, proteomics, metabolomics epigenomics strategies which would productivity well-being more attributes similar character Dr. Jekyll plant growth, health environment akin Mr. Hyde.

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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Bacillus as a source of phytohormones for use in agriculture

Applied Microbiology and Biotechnology, Journal Year: 2021, Volume and Issue: 105(23), P. 8629 - 8645

Published: Oct. 26, 2021

Language: Английский

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The Role of Beneficial Microorganisms in Soil Quality and Plant Health

Sustainability, Journal Year: 2022, Volume and Issue: 14(9), P. 5358 - 5358

Published: April 29, 2022

The practice of agriculture has always been a source food production. increase in the global population leads to improvements agriculture, increasing crop quality and yield. Plant growth results from interaction between roots their environment, which is soil or planting medium that provides structural support as well water nutrients plant. Therefore, good management necessary prevent problems will directly affect plant health. Integrated pragmatic approach production, includes integrated pest focusing on protection. Currently, there an extended idea many microorganisms, such fungi bacteria, are useful since they attractive eco-friendly alternatives mineral fertilizers chemical pesticides. microbes interact with plants supply crops, control phytopathogens stimulate growth. These actions have beneficial implications agriculture. Despite great benefits microorganisms use quite limited; however, recent years. This may be because more progress needed field applications. One most employed genera Bacillus it several mechanisms act biofertilizers biopesticides. In this review, role special emphasis genus, health discussed, highlighting advances topic.

Language: Английский

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Potential use of Bacillus spp. as an effective biostimulant against abiotic stresses in crops—A review

Current Research in Biotechnology, Journal Year: 2023, Volume and Issue: 5, P. 100128 - 100128

Published: Jan. 1, 2023

Environmental (abiotic) stresses significantly threaten the worldwide crop production and food security. Rapid, drastic changes in global climate have exacerbated such for crops. Plant-associated bacteria been shown to enhance stress resistance cope with negative impacts of various abiotic through induction mechanisms. In soil, rhizosphere endosphere plants, Bacillus genus is a predominant bacterial genus. Members this genus, which are tremendously diverse both metabolically genetically, survive long time under unfavorable environmental conditions due their ability form long-lived, stress-tolerant spores. spp. secrete several metabolites that trigger plant growth plants' tolerance biotic stresses. Some species available commercially as phytostimulants, biopesticides, biofertilizers. Due functional versatility, one most widely used agro-biotech industry. However, potential has not yet sufficiently realized, transferring technology related from lab environment real world applications field needs be emphasized. A better understanding mechanisms action beneficial needed development products support green biotechnology agriculture industries. This report comprehensively reviews (e.g., salinity, drought, inorganic organic pollutant toxicity, nutritional imbalance, low–high temperatures, waterlogging) -stressed discusses potentials new biotechnological implications, highlighting gaps remain explored improve expand on Bacillus-based biostimulants.

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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Bacillus spp. as Bioagents: Uses and Application for Sustainable Agriculture

Biology, Journal Year: 2022, Volume and Issue: 11(12), P. 1763 - 1763

Published: Dec. 5, 2022

Food security will be a substantial issue in the near future due to expeditiously growing global population. The current trend agriculture industry entails extravagant use of synthesized pesticides and fertilizers, making sustainability difficult challenge. Land degradation, lower production, vulnerability both abiotic biotic stresses are problems caused by usage these fertilizers. major goal sustainable is ameliorate productivity reduce pests disease prevalence such degree that prevents large-scale damage crops. Agriculture composite interrelation among plants, microbes, soil. Plant microbes play role growth promotion improve soil fertility as well. Bacillus spp. produces an extensive range bio-chemicals assist plant control, promote development, make them suitable for agricultural uses. support N fixation, P K solubilization, phytohormone synthesis, addition being most propitious biocontrol agent. Moreover, Bacilli excrete extracellular metabolites, including antibiotics, lytic enzymes, siderophores, demonstrate antagonistic activity against phytopathogens. boosts resistance toward pathogens inducing systemic (ISR). effective microbial insecticide insects thuringiensis (Bt). Additionally, incorporation toxin genes genetically modified crops increases pests. There constant increase identified species potential agents. they have been involved biosynthesis metallic nanoparticles. main objective this review article display uses application specie promising biopesticide agriculture. strains yield attributes could valuable developing novel formulations lead way

Language: Английский

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Biocontrol of plant diseases by Bacillus spp.

Physiological and Molecular Plant Pathology, Journal Year: 2023, Volume and Issue: 126, P. 102048 - 102048

Published: May 17, 2023

Language: Английский

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