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Wang R, Li B, Cai S, Ding Y, Shi M, Jin T, Lin W, Liu P. Genetic Diversity of Ralstonia solanacearum Causing Tobacco Bacterial Wilt in Fujian Province and Identification of Biocontrol Streptomyces sp. PLANT DISEASE 2024; 108:1946-1958. [PMID: 38499975 DOI: 10.1094/pdis-08-23-1604-sr] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/20/2024]
Abstract
Tobacco bacterial wilt is a highly destructive soilborne disease caused by the Ralstonia solanacearum species complex, exhibiting a significant risk to global flue-cured tobacco cultivation and resulting in substantial economic loss. In this study, 77 isolates were collected from three prominent flue-cured tobacco cultivation areas in Fujian, China (Nanping, Sanming, and Longyan), in 2021 and 2022. The isolated strains were classified through phylotype-specific multiplex polymerase chain reaction (Pmx-PCR) and physiological tests. The analysis showed that all the strains were associated with phylotype I, race 1, and biovar III. Subsequent phylogenetic analysis using partial egl gene sequences classified the 77 isolates into 5 distinct sequevars: 13, 15, 16, 17, and 34. Notably, a remarkable predominance of sequevar 15 was observed in Fujian Province, while sequevar 16 was first reported on tobacco in China, which was identified in other plants, expanding the understanding of its host range and distribution in the country. In addition, a Streptomyces strain extracted from the rhizosphere soil of tobacco was found to inhibit the growth of multiple sequevars of tobacco R. solanacearum, indicating its broad-spectrum antagonistic properties. Furthermore, pot experiments showed that the strain St35 effectively controlled tobacco bacterial wilt. The isolate St35 was conclusively identified as Streptomyces gancidicus according to the morphological and genetic features. In summary, the present study demonstrated the genetic diversity and distribution of tobacco R. solanacearum strains in the Fujian province of China, as well as the identification of a candidate biological control agent for the management of tobacco bacterial wilt.
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Affiliation(s)
- Rongbo Wang
- Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests, Institute of Plant Protection, Fujian Academy of Agricultural Sciences, Fuzhou 350013, China
| | - Benjin Li
- Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests, Institute of Plant Protection, Fujian Academy of Agricultural Sciences, Fuzhou 350013, China
| | - Songling Cai
- Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests, Institute of Plant Protection, Fujian Academy of Agricultural Sciences, Fuzhou 350013, China
| | - Yingfu Ding
- Nanping Branch, Fujian Tobacco Company, Nanping 353000, China
| | - Mingyue Shi
- Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests, Institute of Plant Protection, Fujian Academy of Agricultural Sciences, Fuzhou 350013, China
| | - Ting Jin
- Xiamen Chanke Bioengineering Co., Ltd., Xiamen 361000, China
| | - Wei Lin
- Nanping Branch, Fujian Tobacco Company, Nanping 353000, China
| | - Peiqing Liu
- Fujian Key Laboratory for Monitoring and Integrated Management of Crop Pests, Institute of Plant Protection, Fujian Academy of Agricultural Sciences, Fuzhou 350013, China
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Ding S, Ma Z, Yu L, Lan G, Tang Y, Li Z, He Z, She X. Comparative genomics and host range analysis of four Ralstonia pseudosolanacearum strains isolated from sunflower reveals genomic and phenotypic differences. BMC Genomics 2024; 25:191. [PMID: 38373891 PMCID: PMC10875864 DOI: 10.1186/s12864-024-10087-7] [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: 07/13/2023] [Accepted: 02/02/2024] [Indexed: 02/21/2024] Open
Abstract
BACKGROUND Bacterial wilt caused by Ralstonia solanacearum species complex (RSSC) is one of the devastating diseases in crop production, seriously reducing the yield of crops. R. pseudosolanacearum, is known for its broad infrasubspecific diversity and comprises 36 sequevars that are currently known. Previous studies found that R. pseudosolanacearum contained four sequevars (13, 14, 17 and 54) isolated from sunflowers sown in the same field. RESULTS Here, we provided the complete genomes and the results of genome comparison of the four sequevars strains (RS639, RS642, RS647, and RS650). Four strains showed different pathogenicities to the same cultivars and different host ranges. Their genome sizes were about 5.84 ~ 5.94 Mb, encoding 5002 ~ 5079 genes and the average G + C content of 66.85% ~ 67%. Among the coding genes, 146 ~ 159 specific gene families (contained 150 ~ 160 genes) were found in the chromosomes and 34 ~ 77 specific gene families (contained 34 ~ 78 genes) in the megaplasmids from four strains. The average nucleotide identify (ANI) values between any two strains ranged from 99.05% ~ 99.71%, and the proportion of the total base length of collinear blocks accounts for the total gene length of corresponding genome was all more than 93.82%. Then, we performed a search for genomic islands, prophage sequences, the gene clusters macromolecular secretion systems, type III secreted effectors and other virulence factors in these strains, which provided detailed comparison results of their presence and distinctive features compared to the reference strain GMI1000. Among them, the number and types of T2SS gene clusters were different in the four strains, among which RS650 included all five types. T4SS gene cluster of RS639 and RS647 were missed. In the T6SS gene cluster, several genes were inserted in the RS639, RS647, and RS650, and gene deletion was also detected in the RS642. A total of 78 kinds of type III secreted effectors were found, which included 52 core and 9 specific effectors in four strains. CONCLUSION This study not only provided the complete genomes of multiple R. pseudosolanacearum strains isolated from a new host, but also revealed the differences in their genomic levels through comparative genomics. Furthermore, these findings expand human knowledge about the range of hosts that Ralstonia can infect, and potentially contribute to exploring rules and factors of the genetic evolution and analyzing its pathogenic mechanism.
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Affiliation(s)
- Shanwen Ding
- Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong, 510640, China
| | - Zijun Ma
- Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong, 510640, China
| | - Lin Yu
- Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong, 510640, China
| | - Guobing Lan
- Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong, 510640, China
| | - Yafei Tang
- Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong, 510640, China
| | - Zhenggang Li
- Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong, 510640, China
| | - Zifu He
- Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong, 510640, China.
| | - Xiaoman She
- Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Plant Protection Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, Guangdong, 510640, China.
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Fan Z, Mei Y, Xing J, Chen T, Hu D, Liu H, Li Y, Liu D, Liu Z, Liang Y. Loop-mediated isothermal amplification (LAMP)/Cas12a assay for detection of Ralstonia solanacearum in tomato. Front Bioeng Biotechnol 2023; 11:1188176. [PMID: 37284238 PMCID: PMC10239818 DOI: 10.3389/fbioe.2023.1188176] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 05/11/2023] [Indexed: 06/08/2023] Open
Abstract
Introduction: Bacterial wilt (BW) caused by the aerobic, Gram-negative pathogenic species Ralstonia solanacearum (RS) is a major disease impacting commercial agriculture worldwide. Asian phylotype I of RS is the cause of tomato bacterial wilt, which has caused severe economic losses in southern China for many years. An urgent priority in control of bacterial wilt is development of rapid, sensitive, effective methods for detection of RS. Methods: We describe here a novel RS detection assay based on combination of loop-mediated isothermal amplification (LAMP) and CRISPR/Cas12a. crRNA1, with high trans-cleavage activity targeting hrpB gene, was selected out of four candidate crRNAs. Two visual detection techniques, involving naked-eye observation of fluorescence and lateral flow strips, were tested and displayed high sensitivity and strong specificity. Results and Discussion: The LAMP/Cas12a assay accurately detected RS phylotype Ⅰ in 14 test strains, and showed low detection limit (2.0 × 100 copies). RS in tomato stem tissue and soil samples from two field sites with suspected BW infection was identified accurately, suggesting potential application of LAMP/Cas12a assay as point-of-care test (POCT). The overall detection process took less than 2 h and did not require professional lab equipment. Our findings, taken together, indicate that LAMP/Cas12a assay can be developed as an effective, inexpensive technique for field detection and monitoring of RS.
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Affiliation(s)
- Zhiyu Fan
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Yuxia Mei
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Jiawei Xing
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Tian Chen
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Di Hu
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Hui Liu
- GNSS Research Center, Wuhan University, Wuhan, China
| | - Yingjun Li
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Derui Liu
- Hubei Jiamachi Ecological Agriculture Co, Ltd, Yichang, China
- Hubei Yishizhuang Agricultural Technology Co, Ltd, Yichang, China
| | - Zufeng Liu
- Hubei Jiamachi Ecological Agriculture Co, Ltd, Yichang, China
- Hubei Yishizhuang Agricultural Technology Co, Ltd, Yichang, China
| | - Yunxiang Liang
- State Key Laboratory of Agricultural Microbiology, College of Life Science and Technology, Huazhong Agricultural University, Wuhan, China
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Plant-Microbe Interaction: Mining the Impact of Native Bacillus amyloliquefaciens WS-10 on Tobacco Bacterial Wilt Disease and Rhizosphere Microbial Communities. Microbiol Spectr 2022; 10:e0147122. [PMID: 35913211 PMCID: PMC9430121 DOI: 10.1128/spectrum.01471-22] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Ralstonia solanacearum, the causative agent of bacterial wilt disease, has been a major threat to tobacco production globally. Several control methods have failed. Thus, it is imperative to find effective management for this disease. The biocontrol agent Bacillus amyloliquefaciens WS-10 displayed a significant control effect due to biofilm formation, and secretion of hydrolytic enzymes and exopolysaccharides. In addition, strain WS-10 can produce antimicrobial compounds, which was confirmed by the presence of genes encoding antimicrobial lipopeptides (fengycin, iturin, surfactin, and bacillomycinD) and polyketides (difficidin, bacilysin, bacillibactin, and bacillaene). Strain WS-10 successfully colonized tobacco plant roots and rhizosphere soil and suppressed the incidence of bacterial wilt disease up to 72.02% by reducing the R. solanacearum population dynamic in rhizosphere soil. Plant-microbe interaction was considered a key driver of disease outcome. To further explore the impact of strain WS-10 on rhizosphere microbial communities, V3-V4 and ITS1 variable regions of 16S and ITS rRNA were amplified, respectively. Results revealed that strain WS-10 influences the rhizosphere microbial communities and dramatically changed the diversity and composition of rhizosphere microbial communities. Interestingly, the relative abundance of genus Ralstonia significantly decreased when treated with strain WS-10. A complex microbial co-occurrence network was present in a diseased state, and the introduction of strain WS-10 significantly changed the structure of rhizosphere microbiota. This study suggests that strain WS-10 can be used as a novel biocontrol agent to attain sustainability in disease management due to its intense antibacterial activity, efficient colonization in the host plant, and ability to transform the microbial community structure toward a healthy state. IMPORTANCE The plant rhizosphere acts as the first line of defense against the invasion of pathogens. The perturbation in the rhizosphere microbiome is directly related to plant health and disease development. The introduction of beneficial microorganisms in the soil shifted the rhizosphere microbiome, induced resistance in plants, and suppressed the incidence of soilborne disease. Bacillus sp. is widely used as a biocontrol agent against soilborne diseases due to its ability to produce broad-spectrum antimicrobial compounds and colonization with the host plant. In our study, we found that the application of native Bacillus amyloliquefaciens WS-10 significantly suppressed the incidence of tobacco bacterial wilt disease by shifting the rhizosphere microbiome and reducing the interaction between rhizosphere microorganisms and bacterial wilt pathogen.
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Geng R, Cheng L, Cao C, Liu Z, Liu D, Xiao Z, Wu X, Huang Z, Feng Q, Luo C, Chen Z, Zhang Z, Jiang C, Ren M, Yang A. Comprehensive Analysis Reveals the Genetic and Pathogenic Diversity of Ralstonia solanacearum Species Complex and Benefits Its Taxonomic Classification. Front Microbiol 2022; 13:854792. [PMID: 35602040 PMCID: PMC9121018 DOI: 10.3389/fmicb.2022.854792] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Accepted: 04/22/2022] [Indexed: 11/23/2022] Open
Abstract
Ralstonia solanacearum species complex (RSSC) is a diverse group of plant pathogens that attack a wide range of hosts and cause devastating losses worldwide. In this study, we conducted a comprehensive analysis of 131 RSSC strains to detect their genetic diversity, pathogenicity, and evolution dynamics. Average nucleotide identity analysis was performed to explore the genomic relatedness among these strains, and finally obtained an open pangenome with 32,961 gene families. To better understand the diverse evolution and pathogenicity, we also conducted a series of analyses of virulence factors (VFs) and horizontal gene transfer (HGT) in the pangenome and at the single genome level. The distribution of VFs and mobile genetic elements (MGEs) showed significant differences among different groups and strains, which were consistent with the new nomenclatures of the RSSC with three distinct species. Further functional analysis showed that most HGT events conferred from Burkholderiales and played a great role in shaping the genomic plasticity and genetic diversity of RSSC genomes. Our work provides insights into the genetic polymorphism, evolution dynamics, and pathogenetic variety of RSSC and provides strong supports for the new taxonomic classification, as well as abundant resources for studying host specificity and pathogen emergence.
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Affiliation(s)
- Ruimei Geng
- Key Laboratory for Tobacco Gene Resources, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Lirui Cheng
- Key Laboratory for Tobacco Gene Resources, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Changdai Cao
- Shandong Rizhao Tobacco Company Ltd., Rizhao, China
| | - Zhengwen Liu
- Key Laboratory for Tobacco Gene Resources, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Dan Liu
- Key Laboratory for Tobacco Gene Resources, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Zhiliang Xiao
- Key Laboratory for Tobacco Gene Resources, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Xiuming Wu
- Key Laboratory for Tobacco Gene Resources, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Zhenrui Huang
- Key Laboratory of Crop Genetic Improvement, Engineering and Technology Research Center for Tobacco Breeding and Comprehensive Utilization of Guangdong, Crops Research Institute of Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Quanfu Feng
- Key Laboratory for Tobacco Gene Resources, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Chenggang Luo
- Key Laboratory for Tobacco Gene Resources, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Zhiqiang Chen
- Key Laboratory for Tobacco Gene Resources, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Zhenchen Zhang
- Key Laboratory of Crop Genetic Improvement, Engineering and Technology Research Center for Tobacco Breeding and Comprehensive Utilization of Guangdong, Crops Research Institute of Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Caihong Jiang
- Key Laboratory for Tobacco Gene Resources, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
| | - Min Ren
- Key Laboratory for Tobacco Gene Resources, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
- *Correspondence: Min Ren,
| | - Aiguo Yang
- Key Laboratory for Tobacco Gene Resources, Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
- Aiguo Yang,
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Li C, Ju Y, Shen P, Wu X, Cao L, Zhou B, Yan X, Pan Y. Development of Recombinase Polymerase Amplification Combined with Lateral Flow Detection Assay for Rapid and Visual Detection of Ralstonia solanacearum in Tobacco. PLANT DISEASE 2021; 105:3985-3989. [PMID: 34236213 DOI: 10.1094/pdis-04-21-0688-re] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Bacterial wilt caused by Ralstonia solanacearum is a serious soilborne disease that results in severe losses to tobacco (Nicotiana tabacum) production in China. In this study, a novel RPA-LFD assay for the rapid visual detection of R. solanacearum was established using recombinase polymerase amplification (RPA) and lateral-flow dipstick (LFD). The RPA-LFD assay was performed at 37°C in 30 min without complex equipment. Targeting the sequence of the RipTALI-9 gene, we designed RPA primers (Rs-rpa-F/R) and an LF probe (Rs-LF-probe) that showed high specificity to R. solanacearum. The sensitivity of RPA-LFD assay to R. solanacearum was the same as that in conventional PCR at 1 pg genomic DNA, 103 CFU/g artificially inoculated tobacco stems, and 104 CFU/g artificially inoculated soil. The RPA-LFD assay could also detect R. solanacearum from plant and soil samples collected from naturally infested tobacco fields. These results suggest that the RPA-LFD assay developed in this study is a rapid, accurate molecular diagnostic tool with high sensitivity for the detection of R. solanacearum.
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Affiliation(s)
- Changfeng Li
- Cotton Research Institute, Anhui Academy of Agricultural Sciences, Hefei, 230031, Anhui, China
| | - Yuliang Ju
- Key Laboratory of Biology and Sustainable Management of Plant Disease and Pests of Anhui Higher Education Institutes, Anhui Agricultural University, Hefei 230036, China
| | - Pengfei Shen
- Key Laboratory of Biology and Sustainable Management of Plant Disease and Pests of Anhui Higher Education Institutes, Anhui Agricultural University, Hefei 230036, China
| | - Xun Wu
- Key Laboratory of Biology and Sustainable Management of Plant Disease and Pests of Anhui Higher Education Institutes, Anhui Agricultural University, Hefei 230036, China
| | - Le Cao
- Key Laboratory of Biology and Sustainable Management of Plant Disease and Pests of Anhui Higher Education Institutes, Anhui Agricultural University, Hefei 230036, China
| | - Benguo Zhou
- Institute of Tobacco, Anhui Academy of Agricultural Sciences, Hefei, 230031, Anhui, China
| | - Xiaoming Yan
- Cotton Research Institute, Anhui Academy of Agricultural Sciences, Hefei, 230031, Anhui, China
| | - Yuemin Pan
- Key Laboratory of Biology and Sustainable Management of Plant Disease and Pests of Anhui Higher Education Institutes, Anhui Agricultural University, Hefei 230036, China
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Lai R, Ikram M, Li R, Xia Y, Yuan Q, Zhao W, Zhang Z, Siddique KHM, Guo P. Identification of Novel Quantitative Trait Nucleotides and Candidate Genes for Bacterial Wilt Resistance in Tobacco ( Nicotiana tabacum L.) Using Genotyping-by-Sequencing and Multi-Locus Genome-Wide Association Studies. FRONTIERS IN PLANT SCIENCE 2021; 12:744175. [PMID: 34745174 PMCID: PMC8566715 DOI: 10.3389/fpls.2021.744175] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 09/22/2021] [Indexed: 05/17/2023]
Abstract
Tobacco bacterial wilt (TBW) is a devastating soil-borne disease threatening the yield and quality of tobacco. However, its genetic foundations are not fully understood. In this study, we identified 126,602 high-quality single-nucleotide polymorphisms (SNPs) in 94 tobacco accessions using genotyping-by-sequencing (GBS) and a 94.56 KB linkage disequilibrium (LD) decay rate for candidate gene selection. The population structure analysis revealed two subpopulations with 37 and 57 tobacco accessions. Four multi-locus genome-wide association study (ML-GWAS) approaches identified 142 quantitative trait nucleotides (QTNs) in E1-E4 and the best linear unbiased prediction (BLUP), explaining 0.49-22.52% phenotypic variance. Of these, 38 novel stable QTNs were identified across at least two environments/methods, and their alleles showed significant TBW-DI differences. The number of superior alleles associated with TBW resistance for each accession ranged from 4 to 24; eight accessions had more than 18 superior alleles. Based on TBW-resistant alleles, the five best cross combinations were predicted, including MC133 × Ruyuan No. 1 and CO258 × ROX28. We identified 52 candidate genes around 38 QTNs related to TBW resistance based on homologous functional annotation and KEGG enrichment analysis, e.g., CYCD3;2, BSK1, Nitab4.5_0000641g0050, Nitab4.5_0000929g0030. To the best of our knowledge, this is the first comprehensive study to identify QTNs, superior alleles, and their candidate genes for breeding TBW-resistant tobacco varieties. The results provide further insight into the genetic architecture, marker-assisted selection, and functional genomics of TBW resistance, improving future breeding efforts to increase crop productivity.
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Affiliation(s)
- Ruiqiang Lai
- International Crop Research Center for Stress Resistance, School of Life Sciences, Guangzhou University, Guangzhou, China
| | - Muhammad Ikram
- International Crop Research Center for Stress Resistance, School of Life Sciences, Guangzhou University, Guangzhou, China
| | - Ronghua Li
- International Crop Research Center for Stress Resistance, School of Life Sciences, Guangzhou University, Guangzhou, China
| | - Yanshi Xia
- International Crop Research Center for Stress Resistance, School of Life Sciences, Guangzhou University, Guangzhou, China
| | - Qinghua Yuan
- Crop Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Weicai Zhao
- Nanxiong Research Institute of Guangdong Tobacco Co., Ltd., Nanxiong, China
| | - Zhenchen Zhang
- Crop Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Kadambot H. M. Siddique
- The UWA Institute of Agriculture, UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA, Australia
| | - Peiguo Guo
- International Crop Research Center for Stress Resistance, School of Life Sciences, Guangzhou University, Guangzhou, China
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Hu Y, Zhao W, Li X, Feng J, Li C, Yang X, Guo Q, Wang L, Chen S, Li Y, Yang Y. Integrated biocontrol of tobacco bacterial wilt by antagonistic bacteria and marigold. Sci Rep 2021; 11:16360. [PMID: 34381095 PMCID: PMC8357815 DOI: 10.1038/s41598-021-95741-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 07/27/2021] [Indexed: 02/07/2023] Open
Abstract
Tobacco bacterial wilt (TBW) is seriously damages the growth of tobacco. There is an urgent need to find a safer and more effective measure to control TBW. In this study, B. amyloliquefaciens ZM9 and marigold powder were applied to the tobacco roots alone or in combination, and the potential inhibition of TBW was assessed. On the other hand, the effects of these treatments on soil physicochemical properties, rhizosphere microbial community and soil metabolites were also evaluated. The results showed that the application of B. amyloliquefaciens ZM9 or marigold powder alone significantly reduced the abundance of R. solanacearum in rhizosphere soil, while the integrated treatment showed the strongest inhibitory effect. Moreover, the integrated treatment can inhibit the secretion of chemoattractants, and affect the change of rhizosphere soil microbial composition. In conclusion, the combination of antagonistic bacteria agent B. amyloliquefaciens ZM9 with marigold powder can enhance the suppression of TBW. Furthermore, B. amyloliquefaciens ZM9 and marigold have synergistic effects on suppressing TBW by regulation soil physicochemical properties, soil metabolites and microbial structure. This study provide a promising strategy for TBW control by integrated applying of B. amyloliquefaciens ZM9 and marigold powder.
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Affiliation(s)
- Yun Hu
- State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Science, Hubei University, Wuhan, 430062, China
| | - Wan Zhao
- State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Science, Hubei University, Wuhan, 430062, China
| | - Xihong Li
- Tobacco Research Institute of Hubei Province, Wuhan, 430030, China
| | - Ji Feng
- Tobacco Research Institute of Hubei Province, Wuhan, 430030, China
| | - Chunli Li
- State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Science, Hubei University, Wuhan, 430062, China
| | - Xiaoqiong Yang
- State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Science, Hubei University, Wuhan, 430062, China
| | - Qingqing Guo
- State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Science, Hubei University, Wuhan, 430062, China
| | - Lin Wang
- Hubei Tobacco Industry Co., Ltd., Wuhan, 430040, China
| | - Shouwen Chen
- State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Science, Hubei University, Wuhan, 430062, China
| | - Yanyan Li
- Tobacco Research Institute of Hubei Province, Wuhan, 430030, China.
| | - Yong Yang
- State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Science, Hubei University, Wuhan, 430062, China.
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9
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Li Y, Wang L, Sun G, Li X, Chen Z, Feng J, Yang Y. Digital gene expression analysis of the response to Ralstonia solanacearum between resistant and susceptible tobacco varieties. Sci Rep 2021; 11:3887. [PMID: 33594109 PMCID: PMC7886896 DOI: 10.1038/s41598-021-82576-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 01/21/2021] [Indexed: 11/09/2022] Open
Abstract
Tobacco bacterial wilt (TBW) caused by Ralstonia solanacearum is the most serious soil-borne disease of tobacco. However, molecular mechanism information of R. solanacearum resistance is limited to tobacco, hindering better breeding of resistant tobacco. In this study, the expression profiles of the rootstalks of Yunyan87 (susceptible cultivar) and Fandi3 (resistant cultivar) at different stages after R. solanacearum infection were compared to explore molecular mechanisms of tobacco resistance against the bacterium. Findings from gene-expression profiling indicated that the number of upregulated differentially expressed genes (DEGs) at 3 and 7 days post-inoculation (dpi) increased significantly in the resistant cultivar. WRKY6 and WRKY11 family genes in WRKY transcription factors, ERF5 and ERF15 family genes in ERFs transcription factors, and genes encoding PR5 were significantly upregulated in the resistant cultivar response to the infection. For the first time, WRKY11 and ERF15 were found to be possibly involved in disease-resistance. The Kyoto Encyclopedia of Genes and Genomes analysis demonstrated glutathione metabolism and phenylpropane pathways as primary resistance pathways to R. solanacearum infection. In the resistant cultivar, DEGs encoding CYP450, TCM, CCoAOMT, 4CL, PAL, CCR, CSE, and CADH, involved in the synthesis of plant antitoxins such as flavonoids, stilbenoids, and lignins, enriched in the phenylpropane pathway were upregulated at 3 and 7 dpi. Furthermore, a pot experiment was performed to verify the role of flavonoids in controlling TBW. This study will strongly contribute to a better understanding of molecular interactions between tobacco plants and R. solanacearum.
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Affiliation(s)
- YanYan Li
- Tobacco Research Institute of Hubei Province, Wuhan, 430030, China
| | - Lin Wang
- China Tobacco Hubei Industrial Co., Ltd., Wuhan, 430040, China
| | - GuangWei Sun
- Tobacco Research Institute of Hubei Province, Wuhan, 430030, China
| | - XiHong Li
- Tobacco Research Institute of Hubei Province, Wuhan, 430030, China
| | - ZhenGuo Chen
- Tobacco Research Institute of Hubei Province, Wuhan, 430030, China
| | - Ji Feng
- Tobacco Research Institute of Hubei Province, Wuhan, 430030, China.
| | - Yong Yang
- School of Life Sciences, Hubei University, Wuhan, 430062, China.
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10
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He Y, Mo Y, Zheng D, Li Q, Lin W, Yuan G. Different Sequevars of Ralstonia pseudosolanacearum Causing Bacterial Wilt of Bidens pilosa in China. PLANT DISEASE 2020; 104:2768-2773. [PMID: 32915706 DOI: 10.1094/pdis-12-19-2738-sc] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Bidens pilosa is an invasive weed that threatens the growth of crops and biodiversity in China. In 2017, suspected bacterial wilt of B. pilosa was discovered in Qinzhou and Beihai, Guangxi, China. A variety of weeds are considered as reservoirs harboring bacterial wilt pathogens, but most do not show obvious symptoms in the field. Identifying the classification status of the B. pilosa bacterial wilt pathogen and exploring its geographical origin might be helpful for clarifying the role of weeds in the circulation of the disease. Phylotyping, sequevar analysis, and cross inoculation of pathogens isolated from B. pilosa and nearby peanut (Arachis hypogaea), balsam gourd (Momordica charantia), and eucalyptus (Eucalyptus robusta) plants were carried out. Three isolates of B. pilosa (Bp01, Bp02, and Bp03) were identified as Ralstonia pseudosolanacearum, race 1, biovar 3, and phylotype I, and belonged to sequevars 17 and 44, and an unknown sequevar. The sequevars isolated from B. pilosa were not completely consistent with those of the nearby hosts, and the virulence of these isolates differed when cross inoculated. The Bp03 sequevar was different from peanut isolate sequevars in the same field and was not identical to any previously designated sequevars. The isolates from B. pilosa and other nearby hosts displayed low or no virulence toward their cross hosts (with wilt incidences less than 33.33%). An exception to this was the isolates from B. pilosa, which displayed high virulence toward eucalyptus (with a wilt incidence of 70.00 to 100.00%). This is the first report of different sequevars of R. pseudosolanacearum causing typical bacterial wilt symptoms in B. pilosa in the field.
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Affiliation(s)
- Yonglin He
- College of Agriculture, Guangxi University, Nanning, Guangxi 530004, China
| | - Yixue Mo
- College of Agriculture, Guangxi University, Nanning, Guangxi 530004, China
| | - Dehong Zheng
- College of Agriculture, Guangxi University, Nanning, Guangxi 530004, China
| | - Qiqin Li
- College of Agriculture, Guangxi University, Nanning, Guangxi 530004, China
| | - Wei Lin
- College of Agriculture, Guangxi University, Nanning, Guangxi 530004, China
| | - Gaoqing Yuan
- College of Agriculture, Guangxi University, Nanning, Guangxi 530004, China
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11
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Gao F, Liu X, Du Z, Hou H, Wang X, Wang F, Yang J. Bayesian phylodynamic analysis reveals the dispersal patterns of tobacco mosaic virus in China. Virology 2019; 528:110-117. [PMID: 30594790 DOI: 10.1016/j.virol.2018.12.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 11/19/2018] [Accepted: 12/01/2018] [Indexed: 01/18/2023]
Abstract
Tobacco mosaic virus (TMV) is widespread in China and causes considerable economic losses to tobacco production. The molecular epidemiology of this virus is, however, poorly understood. In this study, we sequenced the genomes of 51 TMV isolates from five tobacco-producing regions in China and investigated the dispersal patterns of this virus. Our phylogenetic analysis showed that TMV might have been introduced to China in the early 1900s, probably first to southwest China. However, TMV then moved to the north of the country, where it expanded. The north became the main seeding region for the subsequent movements of the virus within China. The north-to-south movement of TMV coincides with a shift of major tobacco-producing areas from north to south in this century, suggesting a link between human activities and the dispersal of TMV in China.
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Affiliation(s)
- Fangluan Gao
- Fujian Key Laboratory of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, PR China; School of Life and Environmental Sciences, University of Sydney, Sydney, NSW 2006, Australia
| | - Xiaowei Liu
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Key Laboratory of Tobacco Pest Monitoring, Controlling & Integrated Management, Qingdao 266101, Shandong, PR China
| | - Zhenguo Du
- Fujian Key Laboratory of Plant Virology, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou 350002, Fujian, PR China
| | - Han Hou
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Key Laboratory of Tobacco Pest Monitoring, Controlling & Integrated Management, Qingdao 266101, Shandong, PR China
| | - Xiaoyan Wang
- Foxcroft School, Middleburg, VA 20118, United States
| | - Fenglong Wang
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Key Laboratory of Tobacco Pest Monitoring, Controlling & Integrated Management, Qingdao 266101, Shandong, PR China.
| | - Jinguang Yang
- Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Key Laboratory of Tobacco Pest Monitoring, Controlling & Integrated Management, Qingdao 266101, Shandong, PR China.
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12
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She X, Yu L, Lan G, Tang Y, He Z. Identification and Genetic Characterization of Ralstonia solanacearum Species Complex Isolates from Cucurbita maxima in China. FRONTIERS IN PLANT SCIENCE 2017; 8:1794. [PMID: 29093727 PMCID: PMC5651519 DOI: 10.3389/fpls.2017.01794] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2017] [Accepted: 10/02/2017] [Indexed: 06/07/2023]
Abstract
Ralstonia solanacearum species complex is a devastating phytopathogen with an unusually wide host range, and new host plants are continuously being discovered. In June 2016, a new bacterial wilt on Cucurbita maxima was observed in Guangdong province, China. Initially, in the adult plant stage, several leaves of each plant withered suddenly and drooped; the plant then wilted completely, and the color of their vasculature changed to dark brown, ultimately causing the entire plant to die. Creamy-whitish bacterial masses were observed to ooze from crosscut stems of these diseased plants. To develop control strategies for C. maxima bacterial wilt, the causative pathogenic isolates were identified and characterized. Twenty-four bacterial isolates were obtained from diseased C. maxima plants, and 16S rRNA gene sequencing and pathogenicity analysis results indicated that the pathogen of C. maxima bacterial wilt was Ralstonia solanacearum. The results from DNA-based analysis, host range determination and bacteriological identification confirmed that the 24 isolates belonged to R. solanacearum phylotype I, race 1, and eight of these isolates belonged to biovar 3, while 16 belonged to biovar 4. Based on the results of partial egl gene sequence analysis, the 24 isolates clustered into three egl- sequence type groups, sequevars 17, 45, and 56. Sequevar 56 is a new sequevar which is described for the first time in this paper. An assessment of the resistance of 21 pumpkin cultivars revealed that C. moschata cv. Xiangyu1 is resistant to strain RS378, C. moschata cv. Xiangmi is moderately resistant to strain RS378, and 19 other pumpkin cultivars, including four C. maxima cultivars and 15 C. moschata cultivars, are susceptible to strain RS378. To the best of our knowledge, this is the first report of C. maxima bacterial wilt caused by R. solanacearum race 1 in the world. Our results provide valuable information for the further development of control strategies for C. maxima wilt disease.
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Affiliation(s)
- Xiaoman She
- Plant Protection Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China
- Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou, China
| | - Lin Yu
- Plant Protection Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Guobing Lan
- Plant Protection Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Yafei Tang
- Plant Protection Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China
| | - Zifu He
- Plant Protection Research Institute Guangdong Academy of Agricultural Sciences, Guangzhou, China
- Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou, China
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13
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Jiang G, Wei Z, Xu J, Chen H, Zhang Y, She X, Macho AP, Ding W, Liao B. Bacterial Wilt in China: History, Current Status, and Future Perspectives. FRONTIERS IN PLANT SCIENCE 2017; 8:1549. [PMID: 28955350 PMCID: PMC5601990 DOI: 10.3389/fpls.2017.01549] [Citation(s) in RCA: 148] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Accepted: 08/24/2017] [Indexed: 05/18/2023]
Abstract
Bacterial wilt caused by plant pathogenic Ralstonia spp. is one of the most important diseases affecting the production of many important crops worldwide. In China, a large scientific community has been dedicated to studying bacterial wilt and its causative agent, Ralstonia pseudosolanacearum and R. solanacearum. Most of their work was published in Chinese, which has hindered international communication and collaboration in this field. In this review, we summarize the status of knowledge on geographical distribution, diversity, and host range of Ralstonia spp., as well as, the impact of bacterial wilt on important crops and disease control approaches, in China. We present areas of research and publications by Chinese scientists and propose the promotion of collaborative research within China and with the international community.
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Affiliation(s)
- Gaofei Jiang
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest UniversityChongqing, China
| | - Zhong Wei
- Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, National Engineering Research Center for Organic-Based Fertilizers, Nanjing Agricultural UniversityNanjing, China
| | - Jin Xu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural SciencesBeijing, China
| | - Huilan Chen
- Key Laboratory of Horticultural Plant Biology, Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural UniversityWuhan, China
- Key Laboratory of Potato Biology and Biotechnology, Ministry of Agriculture, College of Horticulture and Forestry Sciences, Huazhong Agricultural UniversityWuhan, China
| | - Yong Zhang
- Research Center of Bioenergy and Bioremediation, College of Resources and Environment, Southwest UniversityChongqing, China
| | - Xiaoman She
- Plant Protection Research Institute, Guangdong Academy of Agricultural SciencesGuangzhou, China
| | - Alberto P. Macho
- Shanghai Center for Plant Stress Biology, CAS Center for Excellence in Molecular Plant Sciences, Shanghai Institutes of Biological Sciences, Chinese Academy of SciencesShanghai, China
| | - Wei Ding
- Laboratory of Natural Products Pesticides, College of Plant Protection, Southwest UniversityChongqing, China
| | - Boshou Liao
- Oil Crops Research Institute, Chinese Academy of Agricultural SciencesWuhan, China
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