Comparative Evaluation of Paclobutrazol and Rhizobacterium Variovorax sp. YNA59 Effects on Mitigating Drought Stress in Chinese Cabbage (Brassica rapa ssp. Pekinensis)

Microbiology Research, Journal Year: 2023, Volume and Issue: 14(3), P. 1210 - 1224

Published: Aug. 24, 2023

Drought has severely impacted worldwide agricultural land, resulting in substantial yield loss and abiotic pressures crops such as Chinese cabbage. Paclobutrazol (PBZ) plant growth-stimulating bacteria have been extensively recommended to reduce a variety of stresses crops. Considering these facts, we used PBZ rhizobacterium Variovorax sp. YNA59, microbe with potential qualities, cabbage under drought stress non-stressed conditions, observed their impacts on morphological physiological attributes. Our findings revealed considerable improvement total biomass growth after treatment YNA59 (28%) (8%) conditions. In contrast, negative results were normal suppressing reducing biomass. The increase parameters, chlorophyll content, relative water photochemical efficiencies PS II, YNA59-treated plants, followed by PBZ, especially drought. Furthermore, significantly increased the endogenous phytohormone abscisic acid level, whereas inoculations decreased it. Antioxidant analysis that YNA glutathione catalase polyphenol oxidase peroxidase levels. These suggested could be more significant for conferring than PBZ.

Language: Английский

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Functional traits and phylogenetic analysis of top-soil inhabiting rhizobacteria associated with tea rhizospheres in North Bengal, India

Current Research in Microbial Sciences, Journal Year: 2023, Volume and Issue: 5, P. 100200 - 100200

Published: Jan. 1, 2023

Rhizobacteria associated with cultivated crops are known to stimulate plant growth through various indirect or direct mechanisms. In recent years, the host list of promotion/promoting rhizobacteria has expanded include bean, barley, cotton, maize, rice, vegetables, peanut, wheat, and several plantation crops. However, interaction tea plants organic conventional gardens is poorly understood. present study, rhizobacterial species rhizosphere were isolated from 14 located in North Bengal, India. total, 16 isolates collected soil samples assessed for antagonistic activity under laboratory conditions. Molecular characterization based on sequencing 16S rRNA gene revealed dominance Bacillus five followed by Pseudomonas two species. Interestingly, only one isolate was affiliated actinobacteria, i.e., Microbacterium barkeri. Out isolates, subtilis OKAKP01, B. BNLG01, paramycoides BOK01, M. barkeri BPATH02, Stenotrophomonas maltophilia BSEY01 showed highest inhibition against Fusarium solani (68.2% 72.8%), Pseudopestalotiopsis theae (71.1% 85.6%), Exobasidium vexans (67.4% 78.3%) causing respective dieback, gray blight, blister blight diseases crop. Further, these also possessed significantly greater antifungal (siderophore producer, protease, chitinase, cellulase activity) (indole-3-acetic acid production, ACC deaminase, ammonia, phosphate solubilization) traits over other eleven isolates. Therefore, chosen their nursery Results experiments that improved rates compared control. this study suggests could be used formulate biopesticides biofertilizers, which applied sustainable cultivation improve crop health reduce disease attack.

Language: Английский

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Regulatory mechanisms of plant rhizobacteria on plants to the adaptation of adverse agroclimatic variables

Frontiers in Plant Science, Journal Year: 2024, Volume and Issue: 15

Published: May 23, 2024

The mutualistic plant rhizobacteria which improve development and productivity are known as growth-promoting (PGPR). It is more significant due to their ability help the plants in different ways. main physiological responses, such malondialdehyde, membrane stability index, relative leaf water content, photosynthetic gas exchange, chlorophyll fluorescence efficiency of photosystem-II, pigments observed during unfavorable environmental conditions. Plant one crucial chemical messengers that mediate response stressed interaction with essential nutrition can enhance agricultural sustainability various genotypes or cultivars. Rhizobacterial inoculated induce biochemical variations resulting increased stress resistance efficiency, defined induced systemic resistance. Omic strategies revealed inoculation caused upregulation stress-responsive genes—numerous recent approaches have been developed protect from threats. microbes compounds they secrete constitute valuable biostimulants play roles regulating mechanisms. present review summarized developments functional characteristics action mechanisms sustaining production under conditions, special attention on rhizobacteria-mediated molecular responses associated stress-induced responses.

Language: Английский

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Multifaceted Plant Growth Promoting Traits and Abiotic Stress Resistance Abilities Exhibited by Chrysanthemum Rhizobacteria

Current Applied Science and Technology, Journal Year: 2024, Volume and Issue: unknown, P. e0259128 - e0259128

Published: June 5, 2024

Plant growth-promoting rhizobacteria (PGPR) boost plant growth and agricultural sustainability in an ecologically friendly way. The cultivation of chrysanthemum, a globally significant flower crop, has relied heavily on substantial agrochemical inputs that have detrimental impact the environment. To assess potential chrysanthemum to reduce this reliance, bacterial strains were retrieved from rhizosphere subjected assessment various traits. Out 34 rhizobacterial isolates, 21 demonstrated production hormone auxin, had phosphate solubilization ability, 22 capable nitrogen fixation, could produce ammonia. Based these findings, seven preeminent PGPR strains, characterized by multifaceted traits, selected for subsequent studies identified as species belonging Acinetobacter, Bacillus, Pantoea, Serratia Staphylococcus. systematically analyzed their capacity endure array abiotic stresses. A majority adaptation under osmotic stress ranging -0.15 -0.49 MPa, temperatures 20°C 30°C, salt within range 3 7% NaCl, which suggests promote across diverse environmental conditions. Additionally, secretion hydrolytic enzymes such protease, pectinase amylase was examined, only Staphylococcus hominis PGPR-12 strain ability all three extracellular hydrolases. These findings underscore application multiple isolates possessing promising plant-probiotic properties enhance conditions, thereby necessitating further exploration through pot field assays.

Language: Английский

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Streptomyces improves sugarcane drought tolerance by enhancing phenylalanine biosynthesis and optimizing the rhizosphere environment

Plant Physiology and Biochemistry, Journal Year: 2024, Volume and Issue: 217, P. 109236 - 109236

Published: Oct. 24, 2024

Language: Английский

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