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Li W, Sun L, Wu H, Gu W, Lu Y, Liu C, Zhang J, Li W, Zhou C, Geng H, Li Y, Peng H, Shi C, Wang D, Peng G. Bacillus velezensis YXDHD1-7 Prevents Early Blight Disease by Promoting Growth and Enhancing Defense Enzyme Activities in Tomato Plants. Microorganisms 2024; 12:921. [PMID: 38792750 PMCID: PMC11124510 DOI: 10.3390/microorganisms12050921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2024] [Revised: 04/20/2024] [Accepted: 04/22/2024] [Indexed: 05/26/2024] Open
Abstract
Bacillus velezensis is well known as a plant growth-promoting rhizobacteria (PGPR) and biocontrol agent. Nevertheless, there are very few reports on the study of B. velezensis on tomato early blight, especially the biocontrol effects among different inoculation concentrations. In this study, an IAA-producing strain, Bacillus velezensis YXDHD1-7 was isolated from the tomato rhizosphere soil, which had the strongest inhibitory effect against Alternaria solani. Inoculation with bacterial suspensions of this strain promoted the growth of tomato seedlings effectively. Furthermore, inoculations at 106, 107, and 108 cfu/mL resulted in control efficacies of 100%, 83.15%, and 69.90%, respectively. Genome sequencing showed that it possesses 22 gene clusters associated with the synthesis of antimicrobial metabolites and genes that are involved in the production of IAA. Furthermore, it may be able to produce spermidine and volatile compounds that also enhance plant growth and defense responses. Our results suggest that strain YXDHD1-7 prevents early blight disease by promoting growth and enhancing the defense enzyme activities in tomato plants. This strain is a promising candidate for an excellent microbial inoculant that can be used to enhance tomato production.
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Affiliation(s)
- Wangxi Li
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China;
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Key Laboratory of Nutrient Cycling and Farmland Conservation of Guangdong Province, Guangzhou 510640, China; (L.S.); (H.W.); (W.G.); (Y.L.); (C.L.); (J.Z.); (W.L.); (C.Z.); (H.G.); (Y.L.); (H.P.); (C.S.)
| | - Lili Sun
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Key Laboratory of Nutrient Cycling and Farmland Conservation of Guangdong Province, Guangzhou 510640, China; (L.S.); (H.W.); (W.G.); (Y.L.); (C.L.); (J.Z.); (W.L.); (C.Z.); (H.G.); (Y.L.); (H.P.); (C.S.)
| | - Hangtao Wu
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Key Laboratory of Nutrient Cycling and Farmland Conservation of Guangdong Province, Guangzhou 510640, China; (L.S.); (H.W.); (W.G.); (Y.L.); (C.L.); (J.Z.); (W.L.); (C.Z.); (H.G.); (Y.L.); (H.P.); (C.S.)
| | - Wenjie Gu
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Key Laboratory of Nutrient Cycling and Farmland Conservation of Guangdong Province, Guangzhou 510640, China; (L.S.); (H.W.); (W.G.); (Y.L.); (C.L.); (J.Z.); (W.L.); (C.Z.); (H.G.); (Y.L.); (H.P.); (C.S.)
| | - Yusheng Lu
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Key Laboratory of Nutrient Cycling and Farmland Conservation of Guangdong Province, Guangzhou 510640, China; (L.S.); (H.W.); (W.G.); (Y.L.); (C.L.); (J.Z.); (W.L.); (C.Z.); (H.G.); (Y.L.); (H.P.); (C.S.)
| | - Chong Liu
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Key Laboratory of Nutrient Cycling and Farmland Conservation of Guangdong Province, Guangzhou 510640, China; (L.S.); (H.W.); (W.G.); (Y.L.); (C.L.); (J.Z.); (W.L.); (C.Z.); (H.G.); (Y.L.); (H.P.); (C.S.)
| | - Jiexin Zhang
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Key Laboratory of Nutrient Cycling and Farmland Conservation of Guangdong Province, Guangzhou 510640, China; (L.S.); (H.W.); (W.G.); (Y.L.); (C.L.); (J.Z.); (W.L.); (C.Z.); (H.G.); (Y.L.); (H.P.); (C.S.)
| | - Wanling Li
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Key Laboratory of Nutrient Cycling and Farmland Conservation of Guangdong Province, Guangzhou 510640, China; (L.S.); (H.W.); (W.G.); (Y.L.); (C.L.); (J.Z.); (W.L.); (C.Z.); (H.G.); (Y.L.); (H.P.); (C.S.)
| | - Changmin Zhou
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Key Laboratory of Nutrient Cycling and Farmland Conservation of Guangdong Province, Guangzhou 510640, China; (L.S.); (H.W.); (W.G.); (Y.L.); (C.L.); (J.Z.); (W.L.); (C.Z.); (H.G.); (Y.L.); (H.P.); (C.S.)
| | - Haoyang Geng
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Key Laboratory of Nutrient Cycling and Farmland Conservation of Guangdong Province, Guangzhou 510640, China; (L.S.); (H.W.); (W.G.); (Y.L.); (C.L.); (J.Z.); (W.L.); (C.Z.); (H.G.); (Y.L.); (H.P.); (C.S.)
| | - Yaying Li
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Key Laboratory of Nutrient Cycling and Farmland Conservation of Guangdong Province, Guangzhou 510640, China; (L.S.); (H.W.); (W.G.); (Y.L.); (C.L.); (J.Z.); (W.L.); (C.Z.); (H.G.); (Y.L.); (H.P.); (C.S.)
| | - Huanlong Peng
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Key Laboratory of Nutrient Cycling and Farmland Conservation of Guangdong Province, Guangzhou 510640, China; (L.S.); (H.W.); (W.G.); (Y.L.); (C.L.); (J.Z.); (W.L.); (C.Z.); (H.G.); (Y.L.); (H.P.); (C.S.)
| | - Chaohong Shi
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Key Laboratory of Nutrient Cycling and Farmland Conservation of Guangdong Province, Guangzhou 510640, China; (L.S.); (H.W.); (W.G.); (Y.L.); (C.L.); (J.Z.); (W.L.); (C.Z.); (H.G.); (Y.L.); (H.P.); (C.S.)
| | - Dan Wang
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Key Laboratory of Plant Nutrition and Fertilizer in South Region, Ministry of Agriculture, Key Laboratory of Nutrient Cycling and Farmland Conservation of Guangdong Province, Guangzhou 510640, China; (L.S.); (H.W.); (W.G.); (Y.L.); (C.L.); (J.Z.); (W.L.); (C.Z.); (H.G.); (Y.L.); (H.P.); (C.S.)
| | - Guixiang Peng
- College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China;
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Eren Eroğlu AE, Eroğlu V, Yaşa İ. Genomic Insights into the Symbiotic and Plant Growth-Promoting Traits of " Candidatus Phyllobacterium onerii" sp. nov. Isolated from Endemic Astragalus flavescens. Microorganisms 2024; 12:336. [PMID: 38399740 PMCID: PMC10891626 DOI: 10.3390/microorganisms12020336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2023] [Revised: 01/30/2024] [Accepted: 01/31/2024] [Indexed: 02/25/2024] Open
Abstract
A novel strain of Gram-negative, rod-shaped aerobic bacteria, identified as IY22, was isolated from the root nodules of Astragalus flavescens. The analysis of the 16S rDNA and recA (recombinase A) gene sequences indicated that the strain belongs to the genus Phyllobacterium. During the phylogenetic analysis, it was found that strain IY22 is closely related to P. trifolii strain PETP02T and P. bourgognense strain STM 201T. The genome of IY22 was determined to be 6,010,116 base pairs long with a DNA G+C ratio of 56.37 mol%. The average nucleotide identity (ANI) values showed a range from 91.7% to 93.6% when compared to its close relatives. Moreover, IY22 and related strains had digital DNA-DNA hybridization (dDDH) values ranging from 16.9% to 54.70%. Multiple genes (including nodACDSNZ, nifH/frxC, nifUS, fixABCJ, and sufABCDES) associated with symbiotic nitrogen fixation have been detected in strain IY22. Furthermore, this strain features genes that contribute to improving plant growth in various demanding environments. This study reports the first evidence of an association between A. flavescens and a rhizobial species. Native high-altitude legumes are a potential source of new rhizobia, and we believe that they act as a form of insurance for biodiversity against the threats of desertification and drought.
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Affiliation(s)
- Asiye Esra Eren Eroğlu
- Basic and Industrial Microbiology Section, Biology Department, Faculty of Science, Ege University, 35100 Izmir, Türkiye;
| | - Volkan Eroğlu
- Botany Section, Biology Department, Faculty of Science, Ege University, 35100 Izmir, Türkiye;
| | - İhsan Yaşa
- Basic and Industrial Microbiology Section, Biology Department, Faculty of Science, Ege University, 35100 Izmir, Türkiye;
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Kämpfer P, Lipski A, Lamothe L, Clermont D, Criscuolo A, McInroy JA, Glaeser SP. Paenibacillus plantiphilus sp. nov. from the plant environment of Zea mays. Antonie Van Leeuwenhoek 2023:10.1007/s10482-023-01852-x. [PMID: 37338631 PMCID: PMC10371898 DOI: 10.1007/s10482-023-01852-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 06/01/2023] [Indexed: 06/21/2023]
Abstract
A Gram-strain positive, aerobic, endospore-forming bacterial strain (JJ-246T) was isolated from the rhizosphere of Zea mays. The 16S rRNA gene sequence similarity comparisons showed a most closely relationship to Paenibacillus oenotherae DT7-4T (98.4%) and Paenibacillus xanthinolyticus 11N27T (98.0%). The pairwise average nucleotide identity and digital DNA-DNA hybridisation values of the JJ-246T genome assembly against publicly available Paenibacillus type strain genomes were below 82% and 33%, respectively. The draft genome of JJ-246T shared many putative plant-beneficial functions contributing (PBFC) genes, related to plant root colonisation, oxidative stress protection, degradation of aromatic compounds, plant growth-promoting traits, disease resistance, drug and heavy metal resistance, and nutrient acquisition. The quinone system of strain JJ-246T, the polar lipid profile and the major fatty acids were congruent with those reported for members of the genus Paenibacillus. JJ-246T was shown to represent a novel species of the genus Paenibacillus, for which the name Paenibacillus plantiphilus sp. nov. is proposed, with JJ-246T (= LMG 32093T = CCM 9089T = CIP 111893T) as the type strain.
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Affiliation(s)
- Peter Kämpfer
- Institut für Angewandte Mikrobiologie, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 26-32, 35392, Giessen, Germany.
| | - André Lipski
- Institut für Ernährungs- und Lebensmittelwissenschaften, Lebensmittelmikrobiologie und -hygiene, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Germany
| | - Lucie Lamothe
- CNRS, IFB-Core, UMS 3601, Institut Français de Bioinformatique, Evry, France
- Institut Pasteur, Bioinformatics and Biostatistics Hub, Université de Paris, 75015, Paris, France
| | - Dominique Clermont
- Institut Pasteur, CIP - Collection of Institut Pasteur, Université de Paris, 75015, Paris, France
| | - Alexis Criscuolo
- Institut Pasteur, Bioinformatics and Biostatistics Hub, Université de Paris, 75015, Paris, France
| | - John A McInroy
- Department of Entomology and Plant Pathology, Auburn University, Alabama, USA
| | - Stefanie P Glaeser
- Institut für Angewandte Mikrobiologie, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 26-32, 35392, Giessen, Germany
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