Potential of Bacterial Strains Isolated from Ironstone Outcrops Bromeliads to Promote Plant Growth Under Drought Conditions

Galeano, Rodrigo Mattos Silva; Godoy, Fernanda Maria de Russo; Duré, Laís Mayara Melo; Fernandes‐Júnior, Paulo Ivan; Baldani, José Ivo; Paggi, Gecele Matos; Zanoelo, Fabiana Fonseca; Brasil, Marivaine Silva

doi:10.1007/s00284-021-02540-7

Cited by 8 publications

(4 citation statements)

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“…Of the eight isolates evaluated, ve strains (VBN02, VBE01, VBE05, VBE17, and VBE19) were positive for IAA production. This growth-regulating substance is one of the most physiologically active auxins, playing an important role in plant growth promotion by contributing to root growth and alleviating biotic and abiotic stresses (Shahzad et al 2017, Galeano et al 2021). The Bacillus strains studied here indicate the capacity of this microorganism in solubilize phosphate to increase soil fertility without causing environmental damage (Rawat et al 2021).…”

Section: Discussionmentioning

confidence: 99%

“…The isolates VBN02, VBE05, VBE57, VBE01, and VBE17 were evaluated for the presence of traits that improve plant growth and development. Previously, Galeano et al (2021) screened the isolates of the culture collection, including VBE03, VBE19, and VBE23, and evaluated indole-3-acetic acid (IAA) production, phosphate solubilization activity, ammonia production, and protease, cellulase, and amylase enzyme presence. The results are presented in the same table as the evaluations of the strains used in this study (Table 4).…”

Section: In Vitro Characterization Of Bacterial Strains For Pgp Traitsmentioning

confidence: 99%

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Bacillus strains with potential for growth promotion and control of white mold in soybean

et al. 2022

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Plant growth-promoting rhizobacteria (PGPR) are known to stimulate the biocontrol of phytopathogenic bacteria and fungi, induce plant growth, and increase the yield of important economic crops. In this study, we evaluated in vivo, the ability of Bacillus strains to control soybean white mold disease and promote the growth of soybean plants under greenhouse conditions. Initially, 27 Bacillus strains were analyzed by PCR for the presence of genes encoding antimicrobial molecules, followed by in vitro tests of the positive strains against four phytopathogenic fungi, Sclerotinia sclerotiorum, Macrophomina phaseolina, Rhizoctonia solani, and Colletotrichum truncatum. The bacterial strains that returned positive results for antimicrobial genes were evaluated in vivo for their growth promoting capacity in soybean cultivars Potencia RR and M6210 IPRO, and white mold control in soybean plants. The results showed that eight strains presented the genes bamD, ituD, and fenF, while the bacAB gene was observed in 16 of all tested Bacillus strains. Brie y, the inoculation of the strain VBN02 in increased the fresh biomass of shoots and roots by 111.9% and 79.39% compared with the control. The greenhouse experiment showed that the inoculation of the strain VBN02 was the best treatment for increasing fresh shoot biomass of the soybean M6210 IPRO and Potencia RR cultivar in the single inoculation in relation to the control (111.9% and 103.57%, respectively). Co-inoculation of soybean inoculant and VBE01 was the superior treatment for increasing fresh shoot and root mass in both the cultivars. Two other strains, VBE05 and VBE01, reduced the disease progression of white mold by 39.1% and 37.5%, respectively. In conclusion, our results showed that the Bacillus strains have potential for biocontrol of white mold and for promoting the growth of soybean plants.

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Section: Discussionmentioning

confidence: 99%

Section: In Vitro Characterization Of Bacterial Strains For Pgp Traitsmentioning

confidence: 99%

Bacillus strains with potential for growth promotion and control of white mold in soybean

et al. 2022

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“…Another study, Galeano et al [140] have been reported Bacillus cereus isolated from Ironstone outcrops under drought conditions. This microbe has ability to solubilize zinc and phosphorus and the production of ammonia, catalase, hydrolytic enzyme activity (cellulase, protease, and amylase) and exopolysaccharides (EPS).…”

Section: Solubilizing Of Zincmentioning

confidence: 98%

Biodiversity, mechanisms, and potential biotechnological applications of minerals solubilizing extremophilic microbes: A review

Devi,

Kaur,

Negi

et al. 2024

J App Biol Biotech

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The earth’s surface consists of arid, semi-arid, and hyper-arid lands, where life is profoundly challenged by harsh conditions such as temperature fluctuations, water scarcity, high levels of solar radiations, and soil salinity. The harsh environmental conditions pose serious consequences on plant survival, growth, and productivity accessibility of nutrients reduces. To cope with the harsh environments and increase plant productivity, an extremophilic microbe has attracted agriculturists and environmentalists. The extremophilic microbes, adapted to extreme environmental conditions, offer an unexploited reservoir for biofertilizers, which could provide various forms of nutrients and alleviate the stress caused by the abiotic factors in an environment-friendly manner. Worldwide, minerals solubilizing extremophilic microbes are distributed in various hotspots and belong to three domains of life including, archaea, bacteria, and eukarya. The minerals solubilizing extremophilic microbes belong to diverse phyla, namely, Ascomycota, Actinobacteria, Basidiomycota, Bacteroidetes, Crenarchaeota, Deinococcus-Thermus, Euryarchaeota, Firmicutes, and Proteobacteria. Mineral solubilizing extremophilic microbes achieve the mineral solubilization of phosphorus, potassium, zinc, and selenium by secreting special compounds such as organic acid, exopolysaccharides, and different enzymes. Consequently, extremophilic microbes are becoming increasingly important in agriculture, industries and environmental biotechnology as well, paving the way for novel sequencing technologies and “metaomics” methods, including metagenomics, metatranscriptomics, and metaproteomics. The extremophilic microbial diversity and their biotechnological application in agriculture and industrial applications will be a milestone for future needs. The present review deals with biodiversity, mechanisms and potential biotechnological applications of minerals solubilizing extremophilic microbes.

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“…The increase in germination rate of chickpea in the presence of two concentrations of PEG (15% and 30%) was proved through inoculation of P. putida (RA) in two varieties of chickpea compared with untreated seeds [176]. A study by Galeano et al [180] found that maize seed inoculation with B. cereus VBE23 under water stress significantly increased germination rate and seed germination parameters. Inoculation of Burkholderia sp.…”

Section: Germination Enhancementmentioning

confidence: 99%

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

Bouremani

Cherif‐Silini

Silini

et al. 2023

Water

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

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Potential of Bacterial Strains Isolated from Ironstone Outcrops Bromeliads to Promote Plant Growth Under Drought Conditions

Cited by 8 publications

References 50 publications

Bacillus strains with potential for growth promotion and control of white mold in soybean

Bacillus strains with potential for growth promotion and control of white mold in soybean

Biodiversity, mechanisms, and potential biotechnological applications of minerals solubilizing extremophilic microbes: A review

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

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