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Carbohydrate-Based Agro-Industrial Waste
Published in Anil Kumar Anal, Parmjit S. Panesar, Valorization of Agro-Industrial Byproducts, 2023
The enzymes produced by the micro-organism Bacillus amyloliquefaciens were utilized to produce amylase enzymes from wheat bran, rice bran, and potato peel. Wheat bran and potato bran demonstrated the highest specific enzyme activity of 1.2 and 1.1 U/mg, respectively (Mojumdar and Deka, 2019). Banana peels were used as a substrate or nutrient source for the production of cellulase using the enzyme produced by Trichoderma viride GIM 3.0010 through solid-state fermentation (SSF) (Ravindran et al., 2018; Hai-Yan Sun et al., 2011). Enzyme-catalyzed production of xylitol was carried out using xylose reductase from Candida guilliermondii using agro-waste such as wheat straw. The substrate was pre-treated at 40 and 50°C for up to 9 h at pH 4.5 with varying xylanase concentrations (12.4 to 37.2 U). The optimal conditions determined for the production of xylitol were 30°C at pH 7 for 8 h with 7.92 U of CXR (Crude preparation of Xylose Reductase) and 10 mM NADPH with 23.9 g xylose (Walsh et al., 2018).
Bioprospecting of Microbial Diversity for Sustainable Agriculture and Environment
Published in Vineet Kumar, Vinod Kumar Garg, Sunil Kumar, Jayanta Kumar Biswas, Omics for Environmental Engineering and Microbiology Systems, 2023
Hiren K. Patel, Nensi K. Thumar, Priyank D. Patel, Azaruddin V. Gohil
Systematic resistance pathway can be activated in Arabidopsis thaliana by VOCs produced and secreted from Bacillus amyloliquefaciens IN937a and Bacillus subtilis GB03 from protection against Erwinia carotovora. Most of the induced systematic resistance pathways are dependent on ethylene and jasmonate and are independent of salicylic acid. Differential gene expression was reported in Bacillus subtilis GB03-treated Arabidopsis for metabolism, modifications of cell wall, and response towards stress condition as it affects morphogenesis through homeostasis of auxin (Zhang et al. 2007). Moreover, Bacillus subtilis GB03 can secrete various VOCs such as ketones, volatile compounds having sulphur, alcohol, and aldehyde, induce phytohormones production in Arabidopsis thaliana, and also enhance photosynthesis. VOCs induce systemic tolerance to abiotic stress condition. For example, VOCs of Bacillus subtilis GB03 induce tolerance towards sodium chloride by downregulation of high-affinity K+ transporter 1 (HKT1) responsible for the lower accumulation of salt in plants (Ortiz-Castro et al. 2009).
Biocontrol Potential and Applications of Extremophiles for Sustainable Agriculture
Published in Ajar Nath Yadav, Ali Asghar Rastegari, Neelam Yadav, Microbiomes of Extreme Environments, 2021
Gajanan Mehetre, Vincent Vineeth Leo, Garima Singh, Prashant Dhawre, Igor Maksimov, Mukesh Yadav, Kalidas Upadhyaya, Bhim Pratap Singh
In a study for the development of plant growth-promoting microbial consortium for drought tolerance, Verma et al. (2018) isolated three Bacillus species, Bacillus subtilis, Bacillus sp. and B. licheniformis from the hot spring of Chumathang area of Leh, India. All three species were found capable of growing in the consortium. The treatment of consortium with Vigna radiate plant showed enhancement in the growth and was also found to be effective in enhancing the production of mung bean under field conditions. Thermophilic species of Bacillus amyloliquefaciens isolated from the compost extracts were reported to have a broad spectrum antifungal activity against various plant pathogenic fungi (Zouari et al. 2016). In this study, the author showed that Bacillus species possess ituC and ituD, srfP and fend genes involved in the production of iturin, surfactin and fengycin, which are effective against the phytopathogens for the biocontrol of damping-off diseases of tomato.
Isolation and identification of high-yielding alkaline phosphatase strain: a novel mutagenesis technique and optimization of fermentation conditions
Published in Preparative Biochemistry & Biotechnology, 2023
Le Bo, Xin Kang, Zuohui Chen, Yue Zhao, Si Wu, Jie Li, Shuang Bao
Bacillus amyloliquefaciens S-1 was screened from the soil, to obtain a strain that will not produce toxic by products when applied in future agricultural production. Bacillus amyloliquefaciens improves plant immunity[35] and secretes antimicrobial peptides.[36] The strain S-52 mutagenized by ARTP could still have high stability of ALPs expression after 20 consecutive passages. ALPs can effectively remove phosphate groups from various molecules, including nucleotides, proteins and alkaloids, to convert phosphorus into soluble compounds that can be absorbed by plants.[37] In soils with low phosphate content, ALPs can effectively hydrolyze the phosphate groups of microorganisms, making them available to phosphate ions.
Insights in nodule-inhabiting plant growth promoting bacteria and their ability to stimulate Vicia faba growth
Published in Egyptian Journal of Basic and Applied Sciences, 2022
Amr M. Mowafy, Mona S. Agha, Samia A. Haroun, Mohamed A. Abbas, Mohamed Elbalkini
The isolate P3 obtained in this study, which is phylogenetically very close to Bacillus amyloliquefaciens, was found to be an IAA producer in addition to its ability to produce ammonia, HCN, siderophores, amylase, cellulase protease, and lipase. Additionally, it could sequestrate for its ability to produce siderophores. Bacillus amyloliquefaciens that is belonging to firmicutes is famous for its activity as plant growth promoting rhizobacteria. It has been reported that B. amyloliquefaciens can produce IAA and GA3 [31]. Additionally, it is considered as a potential biocontrol agent against several plant pathogens, such as Fusarium oxysporum [31] because of its ability to produce several volatile organic compounds (VOCs).