Antifungal Potential of PGPR, their Growth Promoting Activity on Seed Germination and Seedling Growth of Winter Wheat and Genetic Variabilities among Bacterial Isolates

Meena, Manoj; Gupta, Shweta; Datta, Soumana

doi:10.20546/ijcmas.2016.501.022

Cited by 20 publications

(4 citation statements)

References 2 publications

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“…Several species of PGPR were shown to enhance the growth of sorghum, a multifunctional crop grown for food, feed, fiber, and fuel [30]. In addition to growth promotion, PGPR can offer tolerance to pathogenic fungi, bacteria, or parasitic plants, and are able to protect the plant from abiotic stresses such as drought [30][31][32]. Due to their positive effects on plant growth and their natural occurrence, PGPR can be used as a bio-fertilizer to partially or completely replace chemical fertilizers and reduce the associated environmental hazards.…”

Section: Introductionmentioning

confidence: 99%

Sorghum Growth Promotion by Paraburkholderia tropica and Herbaspirillum frisingense: Putative Mechanisms Revealed by Genomics and Metagenomics

et al. 2020

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Bacteria from the genera Paraburkholderia and Herbaspirillum can promote the growth of Sorghum bicolor, but the underlying mechanisms are not yet known. In a pot experiment, sorghum plants grown on sterilized substrate were inoculated with Paraburkholderia tropica strain IAC/BECa 135 and Herbaspirillum frisingense strain IAC/BECa 152 under phosphate-deficient conditions. These strains significantly increased Sorghum bicolor cultivar SRN-39 root and shoot biomass. Shotgun metagenomic analysis of the rhizosphere revealed successful colonization by both strains; however, the incidence of colonization was higher in plants inoculated with P. tropica strain IAC/BECa 135 than in those inoculated with H. frisingense strain IAC/BECa 152. Conversely, plants inoculated with H. frisingense strain IAC/BECa 152 showed the highest increase in biomass. Genomic analysis of the two inoculants implied a high degree of rhizosphere fitness of P. tropica strain IAC/BECa 135 through environmental signal processing, biofilm formation, and nutrient acquisition. Both genomes contained genes related to plant growth-promoting bacterial (PGPB) traits, including genes related to indole-3-acetate (IAA) synthesis, nitrogen fixation, nodulation, siderophore production, and phosphate solubilization, although the P. tropica strain IAC/BECa 135 genome contained a slightly more extensive repertoire. This study provides evidence that complementary mechanisms of growth promotion in Sorghum might occur, i.e., that P. tropica strain IAC/BECa 135 acts in the rhizosphere and increases the availability of nutrients, while H. frisingense strain IAC/BECa 152 influences plant hormone signaling. While the functional and taxonomic profiles of the rhizobiomes were similar in all treatments, significant differences in plant biomass were observed, indicating that the rhizobiome and the endophytic microbial community may play equally important roles in the complicated plant-microbial interplay underlying increased host plant growth.

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Section: Introductionmentioning

confidence: 99%

Sorghum Growth Promotion by Paraburkholderia tropica and Herbaspirillum frisingense: Putative Mechanisms Revealed by Genomics and Metagenomics

et al. 2020

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“…Biofertilizers contain different living organisms that, when given to surfaces of the plants, seed, and soil, quicken their procedures that bring about the accessibility of nutrients for simple absorption [331][332][333][334][335] (Figure 2). As nitrogen is latent in nature, the plants can't use it directly.…”

Section: Microbe Based Inoculantmentioning

confidence: 99%

“…Atmospheric nitrogen fixation is completed by the enzyme nitrogenase of Rhizobium with the assistance of nodules, a protein, and moves towards plants with a viable beneficial interaction [347]. Furthermore, supplements, i.e., phosphorus, potassium, calcium, magnesium and even iron amassing were observed [334,[348][349][350][351][352][353].…”

Section: Rhizobiummentioning

confidence: 99%

Bioinoculants—Natural Biological Resources for Sustainable Plant Production

et al. 2021

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Agricultural sustainability is of foremost importance for maintaining high food production. Irresponsible resource use not only negatively affects agroecology, but also reduces the economic profitability of the production system. Among different resources, soil is one of the most vital resources of agriculture. Soil fertility is the key to achieve high crop productivity. Maintaining soil fertility and soil health requires conscious management effort to avoid excessive nutrient loss, sustain organic carbon content, and minimize soil contamination. Though the use of chemical fertilizers have successfully improved crop production, its integration with organic manures and other bioinoculants helps in improving nutrient use efficiency, improves soil health and to some extent ameliorates some of the constraints associated with excessive fertilizer application. In addition to nutrient supplementation, bioinoculants have other beneficial effects such as plant growth-promoting activity, nutrient mobilization and solubilization, soil decontamination and/or detoxification, etc. During the present time, high energy based chemical inputs also caused havoc to agriculture because of the ill effects of global warming and climate change. Under the consequences of climate change, the use of bioinputs may be considered as a suitable mitigation option. Bioinoculants, as a concept, is not something new to agricultural science, however; it is one of the areas where consistent innovations have been made. Understanding the role of bioinoculants, the scope of their use, and analysing their performance in various environments are key to the successful adaptation of this technology in agriculture.

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“…The PGPRs have emerged as the best alternative of hazardous chemical fertilizers for sustainable and eco-friendly agriculture, Manuscript received September 25, 2017; revised November 25, 2017 because they are diazotrophs converting N 2 into ammonia to be used by plants and also trigger plant growth via production of phytohormones, viz., IAA, gibberellic acid, cytokinins and ethylene. 80% of diazotrophic indole producing rhizobacteria promotes plant growth directly via phosphate solubilization, production of plant enzymes, HCN, antibiotics, siderophores for sequestering of iron and by lowering ethylene concentration via ACC deaminase activity [3]. IAA acts as an important signal molecule in the regulation of plant development by initiation, cell division and cell enlargement [4].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Indole-3-Acetic Acid Production by Diazotrophic B. subtilis DR2 (KP455653), Isolated from Rhizosphere of Eragrostis cynosuroides

Kumari¹,

Prabha²,

Singh³

et al. 2018

IJPMBS

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Diazotrophic rhizobacteria, trigger and enhance plant growth as well as yield through various mechanisms, so their use can reduce the application frequency of chemical fertilizers. Indole-3-acetic acid (IAA), a most common natural auxin influences several physiological processes of the plant's health. The present study is aimed to optimize the conditions for IAA production, along with assay for plant growth promoting traits of Bacillus subtilis DR2 (KP455653), which is a diazotrophic Gram positive, rod bacterium, isolated from rhizosphere of road side weed, Eragrostis cynosuroides from Danapur, Patna, Bihar, India. The screening for IAA production was done in JNFbˉ broth with tryptophan (1 g.l-1) and without tryptophan at pH 5.8, 30±2 °C temperature and 48 h incubation. 137.81 µg.ml-1 and 100.26 µg.ml-1 IAA was produced in Trp + and Trpmedia, respectively. Under various optimized conditions, maximum IAA was produced at 96 h incubation (137.81 µg.ml-1), 35 °C temperature (141.92 µg.ml-1), pH 7 (158.79 µg.ml-1), mannitol as carbon (160.85 µg.ml-1) and ammonium sulfate as nitrogen (162.93 µg.ml-1) sources with tryptophan at final concentration of 1.2 µg.ml-1 (168.09 µg.ml-1), which enhanced the production by 1.2 fold. The findings suggest that B. subtilis DR2 is a potent organism to be used as biofertilizer. 

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Antifungal Potential of PGPR, their Growth Promoting Activity on Seed Germination and Seedling Growth of Winter Wheat and Genetic Variabilities among Bacterial Isolates

Cited by 20 publications

References 2 publications

Sorghum Growth Promotion by Paraburkholderia tropica and Herbaspirillum frisingense: Putative Mechanisms Revealed by Genomics and Metagenomics

Sorghum Growth Promotion by Paraburkholderia tropica and Herbaspirillum frisingense: Putative Mechanisms Revealed by Genomics and Metagenomics

Bioinoculants—Natural Biological Resources for Sustainable Plant Production

Optimization of Indole-3-Acetic Acid Production by Diazotrophic B. subtilis DR2 (KP455653), Isolated from Rhizosphere of Eragrostis cynosuroides

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