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Yang X, Xie Y, Qiao Y, Chang F, Wang T, Li J, Wu L, Li C, Gao Y. Drought stress tolerance and metabolomics of Medicago sativa induced by Bacillus amyloliquefaciens DGL1. FRONTIERS IN PLANT SCIENCE 2024; 15:1378707. [PMID: 38803604 PMCID: PMC11128672 DOI: 10.3389/fpls.2024.1378707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Accepted: 04/22/2024] [Indexed: 05/29/2024]
Abstract
Introduction This study used Bacillus amyloliquefaciens DGL1 isolated from the arid sandy land of the Qinghai-Tibetan Plateau as the research strain and investigated the effects of DGL1 on the biomass, physiology, and metabolites of Medicago sativa under different intensities of drought stress to provide a high-quality bacterial source and a theoretical basis for the research and development of biological fertilizer suitable for arid areas. Methods The exopolysaccharides (EPS), 1-Aminocyclopropane-1-carboxylate deaminase (ACC), and phosphorus solubilizing capacity of DGL1 were determined. The effects of a DGL1 suspension on alfalfa biomass, physiological indexes, degree of peroxidation of cell membranes, and activity of antioxidant enzymes were determined after irrigating roots under drought stress. The effects on soil physicochemical properties were also evaluated, and metabolomics analysis was performed to explore the effect of DGL1 on the metabolites of alfalfa under drought stress. Results Strain DGL1 produced extracellular polysaccharide EPS and ACC deaminase and was capable of phosphorus solubilization. Treatment with DGL1 increased the biomass of alfalfa under different degrees of drought stress, significantly increased the activities of alfalfa antioxidant enzymes Super Oxide Dismutase (SOD), Peroxidase (POD), and catalase (CAT), reduced the content of MDA and H2O2, and increased the content of quick-acting phosphorus, quick-acting potassium, ammonium nitrogen, and nitrate nitrogen in the soil, thus improving soil fertility. Through metabolomics analysis, DGL1 was shown to affect amino acid metabolic pathways, such as arginine, leucine, glutamate, and tyrosine, as well as the levels of energy-providing polysaccharides and lipids, in alfalfa under 15% PEG-6000 drought stress, enhancing alfalfa's capacity to resist drought stress. Discussion Strain DGL1 enhances the drought suitability of alfalfa and has the potential for dryland development as a biological agent.
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Affiliation(s)
- Xue Yang
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, China
- Key Laboratory of Use of Forage Germplasm Resources on Tibetan Plateau of Qinghai Province, Qinghai University, Xining, China
| | - Yongli Xie
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, China
- Key Laboratory of Use of Forage Germplasm Resources on Tibetan Plateau of Qinghai Province, Qinghai University, Xining, China
- State Key Laboratory of Plateau Ecology and Agriculture of Qinghai University, Xining, Qinghai, China
| | - Youming Qiao
- State Key Laboratory of Plateau Ecology and Agriculture of Qinghai University, Xining, Qinghai, China
| | - Feifei Chang
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, China
| | - Tian Wang
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, China
| | - Junxi Li
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, China
| | - Lingling Wu
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, China
| | - Chen Li
- Xining Forestry Scientific Research Institute, Xining, Qinghai, China
| | - Ying Gao
- College of Agriculture and Animal Husbandry, Qinghai University, Xining, China
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Jiao W, Wen J, Li N, Ou T, Qiu C, Ji Y, Lin K, Liu X, Xie J. The biocontrol potentials of rhizospheric bacterium Bacillus velezensis K0T24 against mulberry bacterial wilt disease. Arch Microbiol 2024; 206:213. [PMID: 38616201 DOI: 10.1007/s00203-024-03935-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 03/15/2024] [Accepted: 03/18/2024] [Indexed: 04/16/2024]
Abstract
Mulberry bacterial wilt disease, caused by Ralstonia pseudosolanacearum, is a devastating soil-borne disease in the silk-mulberry-related industry. In this study, through high-throughput sequencing, we compared the rhizosphere bacterial composition of the mulberry-resistant cultivar (K10) and susceptible cultivar (G12), confirming Bacillus as a genus-level biomarker for K10. Next, twelve Bacillus spp. isolates, derived from the rhizosphere of K10, were screened for their antagonistic activity against R. pseudosolanacearum. The isolate showing strong antagonism was identified as B. velezensis K0T24 and selected for further analysis. The fermentation supernatant of B. velezensis K0T24 significantly inhibited the growth of R. pseudosolanacearum (82.47%) and the expression of its pathogenic genes. Using B. velezensis K0T24 in mulberry seedlings also increased defense enzyme activities and achieved a control efficacy of up to 55.17% against mulberry bacterial wilt disease. Collectively, our findings demonstrate the potential of B. velezensis K0T24 in suppressing mulberry bacterial wilt disease.
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Affiliation(s)
- Wenlian Jiao
- State Key Laboratory of Resource Insects, College of Sericulture, Textile and Biomass Science, Southwest University, No.2 Tiansheng Road, Beibei District, Chongqing, 400715, China
| | - Ju Wen
- State Key Laboratory of Resource Insects, College of Sericulture, Textile and Biomass Science, Southwest University, No.2 Tiansheng Road, Beibei District, Chongqing, 400715, China
| | - Na Li
- State Key Laboratory of Resource Insects, College of Sericulture, Textile and Biomass Science, Southwest University, No.2 Tiansheng Road, Beibei District, Chongqing, 400715, China
| | - Ting Ou
- State Key Laboratory of Resource Insects, College of Sericulture, Textile and Biomass Science, Southwest University, No.2 Tiansheng Road, Beibei District, Chongqing, 400715, China
| | - Changyu Qiu
- Guangxi Key Laboratory of Sericultural Genetic Improvement and Efficient Breeding, Guangxi Zhuang Autonomous Region Sericultural Technology Promotion Station, Nanning, Guangxi Zhuang Autonomous Region, 530007, China
| | - Yutong Ji
- Westa College, Southwest University, Chongqing, 400715, China
| | - Kai Lin
- State Key Laboratory of Resource Insects, College of Sericulture, Textile and Biomass Science, Southwest University, No.2 Tiansheng Road, Beibei District, Chongqing, 400715, China
| | - Xiaojiao Liu
- State Key Laboratory of Resource Insects, College of Sericulture, Textile and Biomass Science, Southwest University, No.2 Tiansheng Road, Beibei District, Chongqing, 400715, China.
| | - Jie Xie
- State Key Laboratory of Resource Insects, College of Sericulture, Textile and Biomass Science, Southwest University, No.2 Tiansheng Road, Beibei District, Chongqing, 400715, China.
- Westa College, Southwest University, Chongqing, 400715, China.
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Herrmann LW, Letti LAJ, Penha RDO, Soccol VT, Rodrigues C, Soccol CR. Bacillus genus industrial applications and innovation: First steps towards a circular bioeconomy. Biotechnol Adv 2024; 70:108300. [PMID: 38101553 DOI: 10.1016/j.biotechadv.2023.108300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 12/06/2023] [Accepted: 12/07/2023] [Indexed: 12/17/2023]
Abstract
In recent decades, environmental concerns have directed several policies, investments, and production processes. The search for sustainable and eco-friendly strategies is constantly increasing to reduce petrochemical product utilization, fossil fuel pollution, waste generation, and other major ecological impacts. The concepts of circular economy, bioeconomy, and biorefinery are increasingly being applied to solve or reduce those problems, directing us towards a greener future. Within the biotechnology field, the Bacillus genus of bacteria presents extremely versatile microorganisms capable of producing a great variety of products with little to no dependency on petrochemicals. They are able to grow in different agro-industrial wastes and extreme conditions, resulting in healthy and environmentally friendly products, such as foods, feeds, probiotics, plant growth promoters, biocides, enzymes, and bioactive compounds. The objective of this review was to compile the variety of products that can be produced with Bacillus cells, using the concepts of biorefinery and circular economy as the scope to search for greener alternatives to each production method and providing market and bioeconomy ideas of global production. Although the genus is extensively used in industry, little information is available on its large-scale production, and there is little current data regarding bioeconomy and circular economy parameters for the bacteria. Therefore, as this work gathers several products' economic, production, and environmentally friendly use information, it can be addressed as one of the first steps towards those sustainable strategies. Additionally, an extensive patent search was conducted, focusing on products that contain or are produced by the Bacillus genus, providing an indication of global technology development and direction of the bacteria products. The Bacillus global market represented at least $18 billion in 2020, taking into account only the products addressed in this article, and at least 650 patent documents submitted per year since 2017, indicating this market's extreme importance. The data we provide in this article can be used as a base for further studies in bioeconomy and circular economy and show the genus is a promising candidate for a greener and more sustainable future.
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Affiliation(s)
- Leonardo Wedderhoff Herrmann
- Bioprocess Engineering and Biotechnology Department, Federal University of Paraná, Francisco H. dos Santos Street, CP 19011, Centro Politécnico, Curitiba, Paraná, 81531-980, Brazil.
| | - Luiz Alberto Junior Letti
- Bioprocess Engineering and Biotechnology Department, Federal University of Paraná, Francisco H. dos Santos Street, CP 19011, Centro Politécnico, Curitiba, Paraná, 81531-980, Brazil
| | - Rafaela de Oliveira Penha
- Bioprocess Engineering and Biotechnology Department, Federal University of Paraná, Francisco H. dos Santos Street, CP 19011, Centro Politécnico, Curitiba, Paraná, 81531-980, Brazil
| | - Vanete Thomaz Soccol
- Bioprocess Engineering and Biotechnology Department, Federal University of Paraná, Francisco H. dos Santos Street, CP 19011, Centro Politécnico, Curitiba, Paraná, 81531-980, Brazil
| | - Cristine Rodrigues
- Bioprocess Engineering and Biotechnology Department, Federal University of Paraná, Francisco H. dos Santos Street, CP 19011, Centro Politécnico, Curitiba, Paraná, 81531-980, Brazil
| | - Carlos Ricardo Soccol
- Bioprocess Engineering and Biotechnology Department, Federal University of Paraná, Francisco H. dos Santos Street, CP 19011, Centro Politécnico, Curitiba, Paraná, 81531-980, Brazil
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