Plant Growth-Promoting Microbial Enzymes

Flores‐Gallegos, Adriana C.; Reyna, Erika Nava

doi:10.1016/b978-0-12-813280-7.00030-x

Cited by 13 publications

(7 citation statements)

References 78 publications

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Section: Discussionmentioning

confidence: 96%

“…In addition to hydrolytic enzymes, CHGP12 also showed the potential to produce siderophores, IAA and GA. In previous reports Bacillus species have been reported to produce hydrolytic enzymes, siderophores, IAA, and GA. 20,52 Several previous reports have proved the direct effect of siderophores on the growth promotion of plants. 20,53,54 Siderophores suppress fungal pathogens by sequestering Fe 3+ under iron limiting conditions making it unavailable for the fungal pathogens and available to the plants.…”

Section: Discussionmentioning

confidence: 99%

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Bacillus thuringiensisCHGP12 uses a multifaceted approach for the suppression of Fusarium oxysporum f. sp. ciceris and to enhance the biomass of chickpea plants

Fatima

Mahmood

Moosa

et al. 2022

Pest Management Science

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BACKGROUND Bacillus species synthesize antifungal lipopeptides (LPs) making them a sustainable and eco‐friendly management option to combat Fusarium wilt of chickpea. RESULTS In this study, 18 endophytic Bacillus strains were assessed for their antifungal activity against Fusarium oxysporum f. sp. ciceris (FOC) associated with Fusarium wilt of chickpea. Among them, 13 strains produced significant inhibition zones in a direct antifungal assay while five strains failed to produce the inhibition of FOC. Bacillus thuringiensis CHGP12 exhibited the highest inhibition 3.45 cm of FOC. The LPs extracted from CHGP12 showed significant inhibition of the pathogen. Liquid chromatography–mass spectrometry (LC–MS) analysis confirmed that CHGP12 possessed the ability to produce fengycin, surfactin, iturin, bacillaene, bacillibactin, plantazolicin, and bacilysin. In an in vitro qualitative assay CHGP12 exhibited the ability to produce lipase, amylase, cellulase, protease, siderophores, and indole 3‐acetic acid (IAA). IAA and gibberellic acid (GA) were quantified using ultra‐performance liquid chromatography (UPLC) with 370 and 770 ng mL−1 concentrations of IAA and GA respectively. Furthermore, the disease severity showed a 40% decrease over control in CHGP12 treated plants compared to the control in a glasshouse experiment. Moreover, CHGP12 also exhibited a significant increase in total biomass of the plants namely, root and shoot growth parameters, stomatal conductance, and photosynthesis rate. CONCLUSION In conclusion, our findings suggest that B. thuringiensis CHGP12 is a promising strain with high antagonistic and growth‐promoting potential against Fusarium wilt of chickpea. © 2022 Society of Chemical Industry.

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Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

Bacillus thuringiensisCHGP12 uses a multifaceted approach for the suppression of Fusarium oxysporum f. sp. ciceris and to enhance the biomass of chickpea plants

Fatima

Mahmood

Moosa

et al. 2022

Pest Management Science

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“…These extracellular enzymes are capable of solubilizing endospermic food material in the form of starch, protein and lipid correspondingly in seed and ultimately deliver energy to the germinating plant parts (Joshi, 2018). Microbial species have been reported to produce hydrolytic enzymes, IAA and siderophores (Flores‐Gallegos & Nava‐Reyna, 2019). Cellulase enzymes act as virulence factors and are believed to be involved in the invasion of PGPE in host plants (Quadt‐Hallmann & Kloepper, 1996).…”

Section: Discussionmentioning

confidence: 99%

Bacillus altitudinis HNH7 and Bacillus velezensis HNH9 promote plant growth through upregulation of growth-promoting genes in upland cotton

Hasan

Khan

Farzand

et al. 2022

Journal of Applied Microbiology

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Aims:The potential of endophytic Bacillus strains to improve plant growth and yield was evaluated. Methods and results: Endophytic Bacillus altitudinis HNH7 and Bacillus velezensisHNH9 were evaluated for their growth-promoting traits. In an in vitro plate assay, HNH7 and HNH9 exhibited proteolytic, amylolytic, lipolytic and cellulolytic activity.HNH7 and HNH9 were able to solubilize iron by producing siderophores but were unable to solubilize insoluble phosphate. PCR confirmed the presence of four growthpromoting genes viz. pvd, budA, asbA and satA in the genome of HNH7, while HNH9 also possessed the same genes except for budA. In a greenhouse experiment, HNH7 and HNH9 promoted the growth of upland cotton plants by upregulating the expression of growth-linked genes, EXP6, ARF1, ARF18, IAA9, CKX6 and GID1b.However, the expression of genes involved in ethylene biosynthesis, that is ERF and ERF17 was downregulated after treating the plants with HNH7 and HNH9 compared to the control. Furthermore, cotton plants treated with HNH7 and HNH9 exhibited a significantly higher rate of photosynthesis and stomatal conductance. Conclusion:HNH7 and HNH9 showed a promising potential to promote the growth of cotton plants.Significance and impact of study: Research on plant growth-promoting Bacillus strains can lead to the formation of biofertilizers.

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“…Actinomycetes derived from the Greek word "actis" meaning ray and "mykes" meaning fungi due to the fact that they possess the features of both fungi and bacteria (Das et al 2008). Actinomycetes are aerobic, spore-producing bacteria filamentous Gram-positive microorganisms (Flores-Gallegos and Nava-Reyna 2019), with high G+C content Genome (Singh and Dubey 2018;Vivas et al 2003), described by a highly intricate life cycle assuming a position within the phylum Actinobacteria, in the domain of bacteria which are included in one of the biggest ordered units among the 18 significant heredities. (Flores-Gallegos and Nava-Reyna 2019).…”

Section: Actinomyces As Soil Dwellersmentioning

confidence: 99%

“…Actinomycetes are aerobic, spore-producing bacteria filamentous Gram-positive microorganisms (Flores-Gallegos and Nava-Reyna 2019), with high G+C content Genome (Singh and Dubey 2018;Vivas et al 2003), described by a highly intricate life cycle assuming a position within the phylum Actinobacteria, in the domain of bacteria which are included in one of the biggest ordered units among the 18 significant heredities. (Flores-Gallegos and Nava-Reyna 2019). Actinomycetes are one of the most widely observed group of soil microorganisms and surely understood for their antimicrobials generation to control the microorganisms.…”

Section: Actinomyces As Soil Dwellersmentioning

confidence: 99%

Rhizobium Presence and Functions in Microbiomes of Non-leguminous Plants

Díez-Méndez

Menéndez

2020

Soil Biology

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The Springer series Soil Biology publishes topical volumes in the fields of microbiology, environmental sciences, plant sciences, biotechnology, biochemistry, microbial ecology, mycology and agricultural sciences.Special emphasis is placed on methodological chapters or volumes. This includes coverage of new molecular techniques relevant to soil biology research or to monitoring and assessing soil quality as well as advanced biotechnological applications. Leading international authorities with a background in academia, industry or government will contribute to the series as authors or editors.

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Plant Growth-Promoting Microbial Enzymes

Cited by 13 publications

References 78 publications

Bacillus thuringiensisCHGP12 uses a multifaceted approach for the suppression of Fusarium oxysporum f. sp. ciceris and to enhance the biomass of chickpea plants

Bacillus thuringiensisCHGP12 uses a multifaceted approach for the suppression of Fusarium oxysporum f. sp. ciceris and to enhance the biomass of chickpea plants

Bacillus altitudinis HNH7 and Bacillus velezensis HNH9 promote plant growth through upregulation of growth-promoting genes in upland cotton

Rhizobium Presence and Functions in Microbiomes of Non-leguminous Plants

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