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Zhang H, Yang MF, Zhang Q, Yan B, Jiang YL. Screening for broad-spectrum antimicrobial endophytes from Rosa roxburghii and multi-omic analyses of biosynthetic capacity. FRONTIERS IN PLANT SCIENCE 2022; 13:1060478. [PMID: 36466255 PMCID: PMC9709285 DOI: 10.3389/fpls.2022.1060478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Accepted: 10/28/2022] [Indexed: 06/17/2023]
Abstract
Plants with certain medicinal values are a good source for isolating function-specific endophytes. Rosa roxburghii Tratt. has been reported to be a botanical source of antimicrobial compounds, which may represent a promising candidate for screening endophytic fungi with antimicrobial potential. In this study, 54 endophytes were isolated and molecularly identified from R. roxburghii. The preliminary screening using the plate confrontation method resulted in 15 different endophytic strains showing at least one strong inhibition or three or more moderate inhibition against the 12 tested strains. Further re-screening experiments based on the disc diffusion method demonstrated that Epicoccum latusicollum HGUP191049 and Setophoma terrestris HGUP190028 had excellent antagonistic activity. The minimum inhibitory concentration (MIC) test for extracellular metabolites finally indicated that HGUP191049 had lower MIC values and a broader antimicrobial spectrum, compared to HGUP190028. Genomic, non-target metabolomic, and comparative genomic studies were performed to understand the biosynthetic capacity of the screened-out endophytic fungus. Genome sequencing and annotation of HGUP191049 revealed a size of 33.24 megabase pairs (Mbp), with 24 biosynthetic gene clusters (BGCs), where the putative antimicrobial compounds, oxyjavanicin, patulin and squalestatin S1 were encoded by three different BGCs, respectively. In addition, the non-targeted metabolic results demonstrated that the strain contained approximately 120 antimicrobial secondary metabolites and was structurally diverse. Finally, comparative genomics revealed differences in pathogenicity, virulence, and carbohydrate-active enzymes in the genome of Epicoccum spp. Moreover, the results of the comparative analyses presumed that Epicoccum is a promising source of antimicrobial terpenes, while oxyjavanicin and squalestatin S1 are antimicrobial compounds shared by the genus. In conclusion, R. roxburghii and the endophytic HGUP191049 isolated from it are promising sources of broad-spectrum antimicrobial agents.
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Affiliation(s)
- Hong Zhang
- Department of Plant Pathology, College of Agriculture, Guizhou University, Guiyang, China
- Guizhou Academy of Testing and Analysis, Guiyang, China
| | - Mao-Fa Yang
- Institute of Entomology, Guizhou University, Guiyang, China
- College of Tobacco Science, Guizhou University, Guiyang, China
| | - Qian Zhang
- Department of Plant Pathology, College of Agriculture, Guizhou University, Guiyang, China
| | - Bin Yan
- Institute of Entomology, Guizhou University, Guiyang, China
| | - Yu-Lan Jiang
- Department of Plant Pathology, College of Agriculture, Guizhou University, Guiyang, China
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Phytostimulating Potential of Endophytic Bacteria from Ethnomedicinal Plants of North-East Indian Himalayan Region. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2022. [DOI: 10.22207/jpam.16.2.05] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
North-East Indian Himalayan Region has a humid subtropical climate having diverse ecosystems. The majority of the population of the region depends on agriculture for sustainable livelihood. However, it can produce only 1.5% of the country’s food grains, thereby importing from other parts of the country for consumption. To feed the increase in the population of the region, there is an urgent need to augment the agricultural and allied products to sustain the population and uplift the economic conditions. Plant beneficial endophytes isolated from ethnomedicinal plants of North-East India play an important role as a plant growth promoter by the production of phytohormones, solubilization and mobilization of mineral nutrients. It also indirectly promotes growth by protecting the plants from diseases through the production of antibiotics, enzymes and volatile compounds. The bacteria also have the potential to induce systemic resistance against various abiotic stresses. Since the region has various agro-climatic conditions, the plants are continuously affected by abiotic stress particularly, acidity, drought and waterlogging, there is a need to explore the indigenous endophytes that can mitigate the stress and enhance the sustainable development of agricultural products.
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Zhang H, Wei TP, Mao YT, Ma MX, Ma K, Shen Y, Zheng MJ, Jia WY, Luo MY, Zeng Y, Jiang YL, Tao GC. Ascodesmisrosicola sp. nov. and Talaromycesrosarhiza sp. nov., two endophytes from Rosaroxburghii in China. Biodivers Data J 2022; 9:e70088. [PMID: 34984041 PMCID: PMC8718520 DOI: 10.3897/bdj.9.e70088] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Accepted: 12/13/2021] [Indexed: 01/19/2023] Open
Abstract
Background Rosaroxburghii Tratt., a deciduous shrub of the family Rosaceae, is usually used as food and medicinal materials and also cultivated as an ornamental. Plant endophytic fungi are a large class of microbial resources not fully researched, with great potential applications. Two strains of Ascodesmis and Talaromyces were isolated during a survey of biodiversity on endophytic fungi of R.roxburghii in China. Multigene phylogenetic analyses showed that each of the two fungi formed a distinct lineage and separated from known congeneric species and they are proposed as two novel taxa. New information Ascodesmisrosicola sp. nov. usually has one or two conspicuous simple or branched ridges extending to the majority of the ascospore surface and remarkably small asci, distinguishing it from the previously-described species in the genus Ascodesmis. Talaromycesrosarhiza sp. nov., of the section Talaromyces, is closely related to T.francoae. It differs from the latter by having both monoverticillate and biverticillate conidiophores, while those of T.francoae are biverticillate. Both novel endophytes are illustrated and described.
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Affiliation(s)
- Hong Zhang
- Department of Plant Pathology, College of Agriculture, Guizhou University, Guiyang, China Department of Plant Pathology, College of Agriculture, Guizhou University Guiyang China.,Guizhou Academy of Testing and Analysis, Guiyang, China Guizhou Academy of Testing and Analysis Guiyang China
| | - Tian-Peng Wei
- Department of Plant Pathology, College of Agriculture, Guizhou University, Guiyang, China Department of Plant Pathology, College of Agriculture, Guizhou University Guiyang China
| | - Yu-Tao Mao
- Grain and Oil Quality Testing Center of Guiyang, Guiyang, China Grain and Oil Quality Testing Center of Guiyang Guiyang China
| | - Ming-Xia Ma
- Guizhou Academy of Testing and Analysis, Guiyang, China Guizhou Academy of Testing and Analysis Guiyang China
| | - Kai Ma
- Guizhou Academy of Testing and Analysis, Guiyang, China Guizhou Academy of Testing and Analysis Guiyang China
| | - Ying Shen
- Guizhou Academy of Testing and Analysis, Guiyang, China Guizhou Academy of Testing and Analysis Guiyang China
| | - Mei-Juan Zheng
- Guizhou Academy of Testing and Analysis, Guiyang, China Guizhou Academy of Testing and Analysis Guiyang China
| | - Wei-Yu Jia
- Department of Plant Pathology, College of Agriculture, Guizhou University, Guiyang, China Department of Plant Pathology, College of Agriculture, Guizhou University Guiyang China
| | - Ming-Yan Luo
- Department of Plant Pathology, College of Agriculture, Guizhou University, Guiyang, China Department of Plant Pathology, College of Agriculture, Guizhou University Guiyang China
| | - Yan Zeng
- Department of Plant Pathology, College of Agriculture, Guizhou University, Guiyang, China Department of Plant Pathology, College of Agriculture, Guizhou University Guiyang China
| | - Yu-Lan Jiang
- Department of Plant Pathology, College of Agriculture, Guizhou University, Guiyang, China Department of Plant Pathology, College of Agriculture, Guizhou University Guiyang China
| | - Guang-Can Tao
- Guizhou Academy of Testing and Analysis, Guiyang, China Guizhou Academy of Testing and Analysis Guiyang China
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Goulart MC, Cueva‐Yesquén LG, Hidalgo Martinez KJ, Attili‐Angelis D, Fantinatti‐Garboggini F. Comparison of specific endophytic bacterial communities in different developmental stages of Passiflora incarnata using culture-dependent and culture-independent analysis. Microbiologyopen 2019; 8:e896. [PMID: 31454177 PMCID: PMC6813437 DOI: 10.1002/mbo3.896] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 06/05/2019] [Accepted: 06/06/2019] [Indexed: 12/12/2022] Open
Abstract
Plants and endophytic microorganisms have coevolved unique relationships over many generations. Plants show a specific physiological status in each developmental stage, which may determine the occurrence and dominance of specific endophytic populations with a predetermined ecological role. This study aimed to compare and determine the structure and composition of cultivable and uncultivable bacterial endophytic communities in vegetative and reproductive stages (RS) of Passiflora incarnata. To that end, the endophytic communities were assessed by plating and Illumina-based 16S rRNA gene amplicon sequencing. Two hundred and four cultivable bacterial strains were successfully isolated. From the plant's RS, the isolated strains were identified mainly as belonging to the genera Sphingomonas, Curtobacterium, and Methylobacterium, whereas Bacillus was the dominant genus isolated from the vegetative stage (VS). From a total of 133,399 sequences obtained from Illumina-based sequencing, a subset of 25,092 was classified in operational taxonomy units (OTUs). Four hundred and sixteen OTUs were obtained from the VS and 66 from the RS. In the VS, the most abundant families were Pseudoalteromonadaceae and Alicyclobacillaceae, while in the RS, Enterobacteriaceae and Bacillaceae were the most abundant families. The exclusive abundance of specific bacterial populations for each developmental stage suggests that plants may modulate bacterial endophytic community structure in response to different physiological statuses occurring at the different plant developmental stages.
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Affiliation(s)
- Marcela C. Goulart
- Graduate Program in Genetics and Molecular Biology, Institute of BiologyUniversity of Campinas (UNICAMP)CampinasBrazil
- Division of Microbial Resources (DRM), Research Center for Agricultural, Biological and Chemical (CPQBA)University of Campinas (UNICAMP)PaulíniaBrazil
| | - Luis G. Cueva‐Yesquén
- Graduate Program in Genetics and Molecular Biology, Institute of BiologyUniversity of Campinas (UNICAMP)CampinasBrazil
- Division of Microbial Resources (DRM), Research Center for Agricultural, Biological and Chemical (CPQBA)University of Campinas (UNICAMP)PaulíniaBrazil
| | - Kelly J. Hidalgo Martinez
- Graduate Program in Genetics and Molecular Biology, Institute of BiologyUniversity of Campinas (UNICAMP)CampinasBrazil
- Division of Microbial Resources (DRM), Research Center for Agricultural, Biological and Chemical (CPQBA)University of Campinas (UNICAMP)PaulíniaBrazil
| | - Derlene Attili‐Angelis
- Division of Microbial Resources (DRM), Research Center for Agricultural, Biological and Chemical (CPQBA)University of Campinas (UNICAMP)PaulíniaBrazil
| | - Fabiana Fantinatti‐Garboggini
- Graduate Program in Genetics and Molecular Biology, Institute of BiologyUniversity of Campinas (UNICAMP)CampinasBrazil
- Division of Microbial Resources (DRM), Research Center for Agricultural, Biological and Chemical (CPQBA)University of Campinas (UNICAMP)PaulíniaBrazil
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