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Zhou Q, Wang Y, Yue L, Ye A, Xie X, Zhang M, Tian Y, Liu Y, Turatsinze AN, Constantine U, Zhao X, Zhang Y, Wang R. Impacts of continuous cropping on the rhizospheric and endospheric microbial communities and root exudates of Astragalus mongholicus. BMC PLANT BIOLOGY 2024; 24:340. [PMID: 38671402 PMCID: PMC11047024 DOI: 10.1186/s12870-024-05024-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Accepted: 04/15/2024] [Indexed: 04/28/2024]
Abstract
Astragalus mongholicus is a medicinal plant that is known to decrease in quality in response to continuous cropping. However, the differences in the root-associated microbiome and root exudates in the rhizosphere soil that may lead to these decreases are barely under studies. We investigated the plant biomass production, root-associated microbiota, and root exudates of A. mongholicus grown in two different fields: virgin soil (Field I) and in a long-term continuous cropping field (Field II). Virgin soil is soil that has never been cultivated for A. mongholicus. Plant physiological measurements showed reduced fresh and dry weight of A. mongholicus under continuous cropping conditions (i.e. Field II). High-throughput sequencing of the fungal and bacterial communities revealed differences in fungal diversity between samples from the two fields, including enrichment of potentially pathogenic fungi in the roots of A. mongholicus grown in Field II. Metabolomic analysis yielded 20 compounds in A. mongholicus root exudates that differed in relative abundance between rhizosphere samples from the two fields. Four of these metabolites (2-aminophenol, quinic acid, tartaric acid, and maleamate) inhibited the growth of A. mongholicus, the soil-borne pathogen Fusarium oxysporum, or both. This comprehensive analysis enhances our understanding of the A. mongholicus microbiome, root exudates, and interactions between the two in response to continuous cropping. These results offer new information for future design of effective, economical approaches to achieving food security.
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Affiliation(s)
- Qin Zhou
- Gansu Gaolan Field Scientific Observation and Research Station for Agricultural Ecosystem, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, Gansu, China
- Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions of Gansu Province, Lanzhou, 730000, China
| | - Yun Wang
- Gansu Gaolan Field Scientific Observation and Research Station for Agricultural Ecosystem, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, Gansu, China
- Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions of Gansu Province, Lanzhou, 730000, China
| | - Liang Yue
- Gansu Gaolan Field Scientific Observation and Research Station for Agricultural Ecosystem, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, Gansu, China
- Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions of Gansu Province, Lanzhou, 730000, China
| | - Ailing Ye
- Gansu Gaolan Field Scientific Observation and Research Station for Agricultural Ecosystem, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, Gansu, China
- Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions of Gansu Province, Lanzhou, 730000, China
| | - Xiaofan Xie
- Gansu Gaolan Field Scientific Observation and Research Station for Agricultural Ecosystem, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, Gansu, China
- Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions of Gansu Province, Lanzhou, 730000, China
| | - Meilan Zhang
- Gansu Gaolan Field Scientific Observation and Research Station for Agricultural Ecosystem, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, Gansu, China
- Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions of Gansu Province, Lanzhou, 730000, China
- General Station of Gansu Cultivated Land Quality Construction and Protection, Lanzhou, 730000, China
| | - Yuan Tian
- Gansu Gaolan Field Scientific Observation and Research Station for Agricultural Ecosystem, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, Gansu, China
- Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions of Gansu Province, Lanzhou, 730000, China
| | - Yang Liu
- Gansu Gaolan Field Scientific Observation and Research Station for Agricultural Ecosystem, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, Gansu, China
- Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions of Gansu Province, Lanzhou, 730000, China
| | - Andéole Niyongabo Turatsinze
- Gansu Gaolan Field Scientific Observation and Research Station for Agricultural Ecosystem, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, Gansu, China
- Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions of Gansu Province, Lanzhou, 730000, China
| | - Uwaremwe Constantine
- Gansu Gaolan Field Scientific Observation and Research Station for Agricultural Ecosystem, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, Gansu, China
- Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions of Gansu Province, Lanzhou, 730000, China
| | - Xia Zhao
- Gansu Gaolan Field Scientific Observation and Research Station for Agricultural Ecosystem, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, Gansu, China
- Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions of Gansu Province, Lanzhou, 730000, China
| | - Yubao Zhang
- Gansu Gaolan Field Scientific Observation and Research Station for Agricultural Ecosystem, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, Gansu, China
| | - Ruoyu Wang
- Gansu Gaolan Field Scientific Observation and Research Station for Agricultural Ecosystem, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, Gansu, China.
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Jemil N, Besbes I, Gharbi Y, Triki MA, Cheffi M, Manresa A, Nasri M, Hmidet N. Bacillus methylotrophicus DCS1: Production of Different Lipopeptide Families, In Vitro Antifungal Activity and Suppression of Fusarium Wilt in Tomato Plants. Curr Microbiol 2024; 81:142. [PMID: 38625396 DOI: 10.1007/s00284-024-03660-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 03/02/2024] [Indexed: 04/17/2024]
Abstract
The present work aims to quantitatively and qualitatively monitor the production of lipopeptide mixtures by Bacillus methylotrophicus DCS1 strain in Landy medium and to investigate the antifungal activities of DCS1 strain and its produced lipopeptides. The in vitro activities were tested by the direct confrontation and agar well diffusion methods, while the in vivo study was carried out in order to test the efficiency of DCS1 bacterial suspension in the control of Fusarium wilt in tomato plants. Identification of lipopeptides by mass spectrometry (LC/MSD-TOF) showed that lipopeptide isoforms produced during the first 24 h and 48 h of fermentation are identical, belonging to bacillomycin D and fengycins A and B homologues with a difference in the yield of production. After 72 h of fermentation corresponding to the end of incubation period, B. methylotrophicus DCS1 is able to produce a mixture of surfactin, pumilacidin, iturin A/mycosubtilin, iturin C1, bacillomycin D and fengycins A and B isoforms. The results of in vitro antifungal experiments suggest that B. methylotrophicus DCS1 has a significant potential as a biocontrol agent, owing to lipopeptides produced, endowed with antifungal activity against several phytopathogenic fungi. The curative treatment of tomato plants with DCS1 bacterial suspension was more effective in the protection against Fusarium oxysporum f. sp. radicis-lycopersici (FORL) than the preventive treatment by comparing the average number of leaves remaining healthy after 30 days of each treatment and the appearance of tomato plants roots. The results indicate that B. methylotrophicus DCS1 exhibit a significant suppression of Fusarium wilt symptoms in tomato plants comparable to that of commercial fungicides and could be an alternative to chemically synthesized pesticides.
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Affiliation(s)
- Nawel Jemil
- Laboratory of Enzymatic Engineering and Microbiology, University of Sfax, National Engineering School of Sfax, B.P. 1173-3038, Sfax, Tunisia.
| | - Imen Besbes
- Laboratory of Enzymatic Engineering and Microbiology, University of Sfax, National Engineering School of Sfax, B.P. 1173-3038, Sfax, Tunisia
| | - Yaakoub Gharbi
- Laboratory of Genetic Resources of Olive Tree : Characterization, Valorization and Phytosanitary Protection, Olive Tree Institute, University of Sfax, 3038, Sfax, Tunisia
| | - Mohamed Ali Triki
- Laboratory of Genetic Resources of Olive Tree : Characterization, Valorization and Phytosanitary Protection, Olive Tree Institute, University of Sfax, 3038, Sfax, Tunisia
| | - Manel Cheffi
- Laboratory of Genetic Resources of Olive Tree : Characterization, Valorization and Phytosanitary Protection, Olive Tree Institute, University of Sfax, 3038, Sfax, Tunisia
| | - Angeles Manresa
- Section of Microbiology, Department of Biology, Health and Environment, Faculty of Pharmacy, University of Barcelona, Joan XXIII S/N, 08028, Barcelona, Spain
| | - Moncef Nasri
- Laboratory of Enzymatic Engineering and Microbiology, University of Sfax, National Engineering School of Sfax, B.P. 1173-3038, Sfax, Tunisia
| | - Noomen Hmidet
- Laboratory of Enzymatic Engineering and Microbiology, University of Sfax, National Engineering School of Sfax, B.P. 1173-3038, Sfax, Tunisia
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El-Sayed ESR, Mohamed SS, Mousa SA, El-Seoud MAA, Elmehlawy AA, Abdou DAM. Bifunctional role of some biogenic nanoparticles in controlling wilt disease and promoting growth of common bean. AMB Express 2023; 13:41. [PMID: 37119397 PMCID: PMC10148937 DOI: 10.1186/s13568-023-01546-7] [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: 09/19/2022] [Accepted: 04/16/2023] [Indexed: 05/01/2023] Open
Abstract
In the present era, nanomaterials are emerging as a powerful tool for management of plant disease and improving crop production to meet the growing global need for food. Thus, this paper was conducted to explore the effectiveness of five different types of nanoparticles (NPs) viz., Co3O4NPs, CuONPs, Fe3O4NPs, NiONPs, and ZnONPs as treatments for Fusarium wilt as well as their role in promoting growth of the common bean plant. The five types of NPs were applied as a treatment for wilt in two ways, therapeutic and protective plans under greenhouse conditions. In vivo experiments showed that all types of NPs significantly increased disease control and diminished the symptoms of Fusarium wilt for both incidence and severity. The recorded values for disease control using the respective NPs during the protective plan were 82.77, 60.17, 49.67, 38.23, and 70.59%. Meanwhile these values were 92.84, 64.67, 51.33, 45.61, 73.84% during the therapeutic plan. Moreover, CuONPs during the protective plan were the best among the five types of NPs employed in terms of wilt disease management. Regarding the use of these NPs as growth promoters, the obtained results confirmed the effectiveness of the five types of NPs in enhancing vegetative growth of the plant under greenhouse conditions, in comparison with control. Among the five NPs, CuONPs improved the plant vegetative growth and particularly increased the content of the photosynthetic pigments; chlorophyll-a (2.96 mg/g), -b (1.93 mg/g), and total carotenoids (1.16 mg/g). These findings suggest the successful and potential exploitation of nanomaterials in agriculture deployed as nano-based products including nano-fungicides and nano-fertilizers. In terms of sustainability, this promising and exceptional multifunctional role of these nanomaterials will surely exert positive impacts on both the environment and sustainable agriculture.
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Affiliation(s)
- El-Sayed R El-Sayed
- Plant Research Department, Nuclear Research Center, Egyptian Atomic Energy Authority, Cairo, Egypt.
| | - Samar S Mohamed
- Microbiology Department, Faculty of Science, Ain Shams University, Cairo, Egypt
| | - Shaimaa A Mousa
- Plant Research Department, Nuclear Research Center, Egyptian Atomic Energy Authority, Cairo, Egypt
| | - Mohamed A Abo El-Seoud
- Plant Research Department, Nuclear Research Center, Egyptian Atomic Energy Authority, Cairo, Egypt
| | - Adel A Elmehlawy
- Microbiology Department, Faculty of Science, Ain Shams University, Cairo, Egypt
| | - Dalia A M Abdou
- Microbiology Department, Faculty of Science, Ain Shams University, Cairo, Egypt
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Kotera S, Hishiike M, Saito H, Komatsu K, Arie T. Differentiation of the Pea Wilt Pathogen Fusarium oxysporum f. sp. pisi from Other Isolates of Fusarium Species by PCR. Microbes Environ 2022; 37:ME21061. [PMID: 34980803 PMCID: PMC8958301 DOI: 10.1264/jsme2.me21061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 11/05/2021] [Indexed: 12/02/2022] Open
Abstract
Pea wilt disease, caused by the soilborne and seedborne fungal pathogen Fusarium oxysporum f. sp. pisi (Fop), first appeared in Japan in 2002. We herein investigated the molecular characteristics of 16 Fop isolates sampled from multiple locations and at different times in Japan. The 16 isolates were divided into three clades in molecular phylogenic ana-lyses based on both the TEF1α gene and the rDNA-IGS region. All of the Fop isolates harbored a PDA1 gene, which encodes the cytochrome P450 pisatin demethylase (Pda1), and also carried one or both of the SIX6 and SIX13 genes, which encode secreted in xylem (Six) proteins. Other forms of F. oxysporum and other species of Fusarium did not carry these sets of genes. Based on these results, a PCR method was developed to identify Fop and differentiate it from other forms and non-pathogenic isolates of Fusarium spp. We also demonstrated that the PCR method effectively detected Fop in infected pea plants and infested soils.
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Affiliation(s)
- Shunsuke Kotera
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology (TUAT), 3–5–8 Saiwaicho, Fuchu, Tokyo, 183–8509, Japan
| | - Masashi Hishiike
- Wakayama Agricultural Experiment Station, Takao, Kishigawacho, Kinokawa, Wakayama, 640–0423, Japan
| | - Hiroki Saito
- Institute of Agriculture, Tokyo University of Agriculture and Technology (TUAT), 3–5–8 Saiwaicho, Fuchu, Tokyo, 183–8509, Japan
| | - Ken Komatsu
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology (TUAT), 3–5–8 Saiwaicho, Fuchu, Tokyo, 183–8509, Japan
- Institute of Agriculture, Tokyo University of Agriculture and Technology (TUAT), 3–5–8 Saiwaicho, Fuchu, Tokyo, 183–8509, Japan
| | - Tsutomu Arie
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology (TUAT), 3–5–8 Saiwaicho, Fuchu, Tokyo, 183–8509, Japan
- Institute of Agriculture, Tokyo University of Agriculture and Technology (TUAT), 3–5–8 Saiwaicho, Fuchu, Tokyo, 183–8509, Japan
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Hernández-Aparicio F, Lisón P, Rodrigo I, Bellés JM, López-Gresa MP. Signaling in the Tomato Immunity against Fusarium oxysporum. Molecules 2021; 26:1818. [PMID: 33804901 PMCID: PMC8036676 DOI: 10.3390/molecules26071818] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 03/18/2021] [Accepted: 03/20/2021] [Indexed: 11/16/2022] Open
Abstract
New strategies of control need to be developed with the aim of economic and environmental sustainability in plant and crop protection. Metabolomics is an excellent platform for both understanding the complex plant-pathogen interactions and unraveling new chemical control strategies. GC-MS-based metabolomics, along with a phytohormone analysis of a compatible and incompatible interaction between tomato plants and Fusarium oxysporum f. sp. lycopersici, revealed the specific volatile chemical composition and the plant signals associated with them. The susceptible tomato plants were characterized by the over-emission of methyl- and ethyl-salicylate as well as some fatty acid derivatives, along with an activation of salicylic acid and abscisic acid signaling. In contrast, terpenoids, benzenoids, and 2-ethylhexanoic acid were differentially emitted by plants undergoing an incompatible interaction, together with the activation of the jasmonic acid (JA) pathway. In accordance with this response, a higher expression of several genes participating in the biosynthesis of these volatiles, such as MTS1, TomloxC,TomloxD, and AOS, as well as JAZ7, a JA marker gene, was found to be induced by the fungus in these resistant plants. The characterized metabolome of the immune tomato plants could lead to the development of new resistance inducers against Fusarium wilt treatment.
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Affiliation(s)
| | | | | | | | - M. Pilar López-Gresa
- Instituto de Biología Molecular y Celular de Plantas, Universitat Politècnica de València—Consejo Superior de Investigaciones Científicas, 46022 Valencia, Spain; (F.H.-A.); (P.L.); (I.R.); (J.M.B.)
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Czislowski E, Zeil-Rolfe I, Aitken EAB. Effector Profiles of Endophytic Fusarium Associated with Asymptomatic Banana ( Musa sp.) Hosts. Int J Mol Sci 2021; 22:ijms22052508. [PMID: 33801529 PMCID: PMC7975973 DOI: 10.3390/ijms22052508] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Revised: 02/19/2021] [Accepted: 02/26/2021] [Indexed: 12/27/2022] Open
Abstract
During the infection of a host, plant pathogenic fungi secrete small proteins called effectors, which then modulate the defence response of the host. In the Fusarium oxysporum species complex (FOSC), the secreted in xylem (SIX) gene effectors are important for host-specific pathogenicity, and are also useful markers for identifying the various host-specific lineages. While the presence and diversity of the SIX genes has been explored in many of the pathogenic lineages of F. oxysporum, there is a limited understanding of these genes in non-pathogenic, endophytic isolates of F. oxysporum. In this study, universal primers for each of the known SIX genes are designed and used to screen a panel of endophytically-associated Fusarium species isolated from healthy, asymptomatic banana tissue. SIX gene orthologues are identified in the majority of the Fusarium isolates screened in this study. Furthermore, the SIX gene profiles of these endophytic isolates do not overlap with the SIX genes present in the pathogenic lineages of F. oxysporum that are assessed in this study. SIX gene orthologues have not been commonly identified in Fusarium species outside of the FOSC nor in non-pathogenic isolates of F. oxysporum. The results of this study indicate that the SIX gene effectors may be more broadly distributed throughout the Fusarium genus than previously thought. This has important implications for understanding the evolution of pathogenicity in the FOSC.
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Constantin ME, Fokkens L, de Sain M, Takken FLW, Rep M. Number of Candidate Effector Genes in Accessory Genomes Differentiates Pathogenic From Endophytic Fusarium oxysporum Strains. FRONTIERS IN PLANT SCIENCE 2021; 12:761740. [PMID: 34912358 PMCID: PMC8666634 DOI: 10.3389/fpls.2021.761740] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 11/08/2021] [Indexed: 05/21/2023]
Abstract
The fungus Fusarium oxysporum (Fo) is widely known for causing wilt disease in over 100 different plant species. Endophytic interactions of Fo with plants are much more common, and strains pathogenic on one plant species can even be beneficial endophytes on another species. However, endophytic and beneficial interactions have been much less investigated at the molecular level, and the genetic basis that underlies endophytic versus pathogenic behavior is unknown. To investigate this, 44 Fo strains from non-cultivated Australian soils, grass roots from Spain, and tomato stems from United States were characterized genotypically by whole genome sequencing, and phenotypically by examining their ability to symptomlessly colonize tomato plants and to confer resistance against Fusarium Wilt. Comparison of the genomes of the validated endophytic Fo strains with those of 102 pathogenic strains revealed that both groups have similar genomes sizes, with similar amount of accessory DNA. However, although endophytic strains can harbor homologs of known effector genes, they have typically fewer effector gene candidates and associated non-autonomous transposons (mimps) than pathogenic strains. A pathogenic 'lifestyle' is associated with extended effector gene catalogs and a set of "host specific" effectors. No candidate effector genes unique to endophytic strains isolated from the same plant species were found, implying little or no host-specific adaptation. As plant-beneficial interactions were observed to be common for the tested Fo isolates, the propensity for endophytism and the ability to confer biocontrol appears to be a predominant feature of this organism. These findings allow prediction of the lifestyle of a Fo strain based on its genome sequence as a potential pathogen or as a harmless or even beneficial endophyte by determining its effectorome and mimp number.
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Tsuzuki R, Cabrera Pintado RM, Biondi Thorndike JA, Gutiérrez Reynoso DL, Amasifuen Guerra CA, Guerrero Abad JC, Aragón Caballero LM, Huarhua Zaquinaula MH, Ureta Sierra C, Alberca Cruz OI, Elespuru Suna MG, Blas Sevillano RH, Torres Arias IC, Flores Ticona J, de Baldárrago FC, Pérez ER, Hozum T, Saito H, Kotera S, Akagi Y, Kodama M, Komatsu K, Arie T. Mutations Found in the Asc1 Gene That Confer Susceptibility to the AAL-Toxin in Ancestral Tomatoes from Peru and Mexico. PLANTS 2020; 10:plants10010047. [PMID: 33379271 PMCID: PMC7824085 DOI: 10.3390/plants10010047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 12/16/2020] [Accepted: 12/18/2020] [Indexed: 11/30/2022]
Abstract
Tomato susceptibility/resistance to stem canker disease caused by Alternaria alternata f. sp. lycopersici and its pathogenic factor AAL-toxin is determined by the presence of the Asc1 gene. Several cultivars of commercial tomato (Solanum lycopersicum var. lycopersicum, SLL) are reported to have a mutation in Asc1, resulting in their susceptibility to AAL-toxin. We evaluated 119 ancestral tomato accessions including S. pimpinellifolium (SP), S. lycopersicum var. cerasiforme (SLC) and S. lycopersicum var. lycopersicum “jitomate criollo” (SLJ) for AAL-toxin susceptibility. Three accessions, SP PER018805, SLC PER018894, and SLJ M5-3, were susceptible to AAL-toxin. SLC PER018894 and SLJ M5-3 had a two-nucleotide deletion (nt 854_855del) in Asc1 identical to that found in SLL cv. Aichi-first. Another mutation (nt 931_932insT) that may confer AAL-toxin susceptibility was identified in SP PER018805. In the phylogenetic tree based on the 18 COSII sequences, a clade (S3) is composed of SP, including the AAL-toxin susceptible PER018805, and SLC. AAL-toxin susceptible SLC PER018894 and SLJ M5-3 were in Clade S2 with SLL cultivars. As SLC is thought to be the ancestor of SLL, and SLJ is an intermediate tomato between SLC and SLL, Asc1s with/without the mutation seem to have been inherited throughout the history of tomato domestication and breeding.
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Affiliation(s)
- Rin Tsuzuki
- Bio-Applications and Systems Engineering—BASE, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183-8509, Japan;
| | - Rosa María Cabrera Pintado
- National Institute of Agricultural Innovation (INIA), La Monila 15026, Lima 12, Peru; (R.M.C.P.); (J.A.B.T.); (D.L.G.R.); (C.A.A.G.); (J.C.G.A.); (M.G.E.S.)
| | - Jorge Andrés Biondi Thorndike
- National Institute of Agricultural Innovation (INIA), La Monila 15026, Lima 12, Peru; (R.M.C.P.); (J.A.B.T.); (D.L.G.R.); (C.A.A.G.); (J.C.G.A.); (M.G.E.S.)
| | - Dina Lida Gutiérrez Reynoso
- National Institute of Agricultural Innovation (INIA), La Monila 15026, Lima 12, Peru; (R.M.C.P.); (J.A.B.T.); (D.L.G.R.); (C.A.A.G.); (J.C.G.A.); (M.G.E.S.)
| | - Carlos Alberto Amasifuen Guerra
- National Institute of Agricultural Innovation (INIA), La Monila 15026, Lima 12, Peru; (R.M.C.P.); (J.A.B.T.); (D.L.G.R.); (C.A.A.G.); (J.C.G.A.); (M.G.E.S.)
| | - Juan Carlos Guerrero Abad
- National Institute of Agricultural Innovation (INIA), La Monila 15026, Lima 12, Peru; (R.M.C.P.); (J.A.B.T.); (D.L.G.R.); (C.A.A.G.); (J.C.G.A.); (M.G.E.S.)
| | - Liliana Maria Aragón Caballero
- Plant Pathology Clinic, La Molina National Agrarian University (UNALM), La Monila 15026, Lima 12, Peru; (L.M.A.C.); (M.H.H.Z.); (C.U.S.); (O.I.A.C.)
| | - Medali Heidi Huarhua Zaquinaula
- Plant Pathology Clinic, La Molina National Agrarian University (UNALM), La Monila 15026, Lima 12, Peru; (L.M.A.C.); (M.H.H.Z.); (C.U.S.); (O.I.A.C.)
| | - Cledy Ureta Sierra
- Plant Pathology Clinic, La Molina National Agrarian University (UNALM), La Monila 15026, Lima 12, Peru; (L.M.A.C.); (M.H.H.Z.); (C.U.S.); (O.I.A.C.)
| | - Olenka Ines Alberca Cruz
- Plant Pathology Clinic, La Molina National Agrarian University (UNALM), La Monila 15026, Lima 12, Peru; (L.M.A.C.); (M.H.H.Z.); (C.U.S.); (O.I.A.C.)
| | - Milca Gianira Elespuru Suna
- National Institute of Agricultural Innovation (INIA), La Monila 15026, Lima 12, Peru; (R.M.C.P.); (J.A.B.T.); (D.L.G.R.); (C.A.A.G.); (J.C.G.A.); (M.G.E.S.)
| | - Raúl Humberto Blas Sevillano
- Crop Husbandry Department, La Molina National Agrarian University (UNALM), La Monila 15026, Lima 12, Peru; (R.H.B.S.); (I.C.T.A.); (J.F.T.)
| | - Ines Carolina Torres Arias
- Crop Husbandry Department, La Molina National Agrarian University (UNALM), La Monila 15026, Lima 12, Peru; (R.H.B.S.); (I.C.T.A.); (J.F.T.)
| | - Joel Flores Ticona
- Crop Husbandry Department, La Molina National Agrarian University (UNALM), La Monila 15026, Lima 12, Peru; (R.H.B.S.); (I.C.T.A.); (J.F.T.)
| | - Fátima Cáceres de Baldárrago
- Department of Biology, Faculty of Biological Sciences, National University of San Augustín, Santa Catalina, Arequipa 04000, Peru;
| | | | - Takuo Hozum
- Interdisciplinary Research Center for Environment and Rural Service, Chapingo Autonomous University, Texcoco, CP 56230, Mexico;
| | - Hiroki Saito
- Graduate School of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183-8509, Japan; (H.S.); (S.K.); (K.K.)
| | - Shunsuke Kotera
- Graduate School of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183-8509, Japan; (H.S.); (S.K.); (K.K.)
| | | | - Motoichiro Kodama
- Department of Agriculture, Tottori University, Tottori 680-8553, Japan;
| | - Ken Komatsu
- Graduate School of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183-8509, Japan; (H.S.); (S.K.); (K.K.)
| | - Tsutomu Arie
- Bio-Applications and Systems Engineering—BASE, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183-8509, Japan;
- Graduate School of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183-8509, Japan; (H.S.); (S.K.); (K.K.)
- Correspondence: ; Tel.: +81-42-367-5691
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Computational Biology Approaches Revealing Novel Target in Vascular Wilt Pathogen Fusarium oxysporum f. sp. lycopersici for the Ligands of Marine Actinobacterial Origin. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2020. [DOI: 10.22207/jpam.14.1.37] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Abdelshafy Mohamad OA, Ma JB, Liu YH, Zhang D, Hua S, Bhute S, Hedlund BP, Li WJ, Li L. Beneficial Endophytic Bacterial Populations Associated With Medicinal Plant Thymus vulgaris Alleviate Salt Stress and Confer Resistance to Fusarium oxysporum. FRONTIERS IN PLANT SCIENCE 2020; 11:47. [PMID: 32117385 PMCID: PMC7033553 DOI: 10.3389/fpls.2020.00047] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Accepted: 01/14/2020] [Indexed: 05/20/2023]
Abstract
As a result of climate change, salinity has become a major abiotic stress that reduces plant growth and crop productivity worldwide. A variety of endophytic bacteria alleviate salt stress; however, their ecology and biotechnological potential has not been fully realized. To address this gap, a collection of 117 endophytic bacteria were isolated from wild populations of the herb Thymus vulgaris in Sheikh Zuweid and Rafah of North Sinai Province, Egypt, and identified based on their 16S rRNA gene sequences. The endophytes were highly diverse, including 17 genera and 30 species. The number of bacterial species obtained from root tissues was higher (n = 18) compared to stem (n = 14) and leaf (n = 11) tissue. The endophytic bacteria exhibited several plant growth-promoting activities in vitro, including auxin synthesis, diazotrophy, phosphate solubilization, siderophore production, and production of lytic enzymes (i.e., chitinase, cellulase, protease, and lipase). Three endophytes representing Bacillus species associated with T. vulgaris such as EGY05, EGY21, and EGY25 were selected based on their ex-situ activities for growth chamber assays to test for their ability to promote the growth of tomato (Solanum lycopersicum L.) under various NaCl concentrations (50-200 mM). All three strains significantly (P < 0.05) promoted the growth of tomato plants under salt stress, compared to uninoculated controls. In addition, inoculated tomato plants by all tested strains decreased (P < 0.05) the activity of antioxidant enzymes (superoxide dismutase, catalase, and peroxidase). Six strains, representing Bacillus and Enterobacter species EGY01, EGY05, EGY16, EGY21, EGY25, and EGY31 were selected based on in vitro antagonistic activity to F. oxysporum for pot experiments under salt stress. All tested strains reduced the disease severity index (DSI) of tomato plants at all tested salt concentrations. Gas-chromatography/mass-spectrometry analysis of cell-free extracts of B. subtilis (EGY16) showed at least ten compounds were known to have antimicrobial activity, with the major peaks being benzene, 1,3-dimethyl-, p-xylene, dibutyl phthalate, bis (2-ethylhexyl) phthalate, and tetracosane. This study demonstrates that diverse endophytes grow in wild thyme populations and that some are able to alleviate salinity stress and inhibit F. oxysporum pathogenesis, making them promising candidates for biofertilizers and biocontrol agents.
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Affiliation(s)
- Osama Abdalla Abdelshafy Mohamad
- CAS Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Urumqi, China
- Department of Biological, Marine Sciences, and Environmental Agriculture, Institute for Post Graduate Environmental Studies, Arish University, Al-Arish, Egypt
- Department of Environmental Protection, Faculty of Environmental Agricultural Sciences, Arish University, Al-Arish, Egypt
| | - Jin-Biao Ma
- CAS Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Urumqi, China
| | - Yong-Hong Liu
- CAS Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Urumqi, China
| | - Daoyuan Zhang
- CAS Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Urumqi, China
| | - Shao Hua
- CAS Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Urumqi, China
| | - Shrikant Bhute
- Department of Environmental Protection, Faculty of Environmental Agricultural Sciences, Arish University, Al-Arish, Egypt
| | - Brian P. Hedlund
- School of Life Sciences, University of Nevada, Las Vegas, NV, United States
| | - Wen-Jun Li
- CAS Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Urumqi, China
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-Sen University, Guangzhou, China
| | - Li Li
- CAS Key Laboratory of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Urumqi, China
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Arie T. Fusarium diseases of cultivated plants, control, diagnosis, and molecular and genetic studies. JOURNAL OF PESTICIDE SCIENCE 2019; 44:275-281. [PMID: 31777447 PMCID: PMC6861427 DOI: 10.1584/jpestics.j19-03] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 09/01/2019] [Indexed: 05/20/2023]
Abstract
Fusarium diseases are significant hindrances to food plant production and are very difficult to control, especially soilborne diseases caused by F. oxysporum. First I outline the Fusarium diseases and introduce examples of the recent outbreak of Fusarium diseases in Japan. Then I summarize my studies on (1) the control of Fusarium diseases by biological agents and by inducing resistance to diseases in plants, (2) the specific detection of forms and races in F. oxysporum using immunological measures and molecular measures based on phylogeny and pathogenicity-determining genes, and (3) molecular and genetic studies on Fusarium diseases, including evolutionary, genetic, and genomic analyses of the emergence and divergence of forms and races in F. oxysporum.
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Affiliation(s)
- Tsutomu Arie
- Graduate School of Agriculture, Tokyo University of Agriculture and Technology (TUAT), 3–5–8 Saiwaicho, Fuchu 183–8509, Japan
- To whom correspondence should be addressed. E-mail:
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Edel-Hermann V, Lecomte C. Current Status of Fusarium oxysporum Formae Speciales and Races. PHYTOPATHOLOGY 2019; 109:512-530. [PMID: 30461350 DOI: 10.1094/phyto-08-18-0320-rvw] [Citation(s) in RCA: 131] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The Fusarium oxysporum species complex includes both plant pathogenic and nonpathogenic strains, which are commonly found in soils. F. oxysporum has received considerable attention from plant pathologists for more than a century owing to its broad host range and the economic losses it causes. The narrow host specificity of pathogenic strains has led to the concept of formae speciales, each forma specialis grouping strains with the same host range. Initially restricted to one plant species, this host range was later found to be broader for many formae speciales. In addition, races were identified in some formae speciales, generally with cultivar-level specialization. In 1981, Armstrong and Armstrong listed 79 F. oxysporum formae speciales and mentioned races in 16 of them. Since then, the known host range of F. oxysporum has considerably increased, and many new formae speciales and races have been identified. We carried out a comprehensive search of the literature to propose this review of F. oxysporum formae speciales and races. We recorded 106 well-characterized formae speciales, together with 37 insufficiently documented ones, and updated knowledge on races and host ranges. We also recorded 58 plant species/genera susceptible to F. oxysporum but for which a forma specialis has not been characterized yet. This review raises issues regarding the nomenclature and the description of F. oxysporum formae speciales and races.
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Affiliation(s)
- V Edel-Hermann
- Agroécologie, AgroSup Dijon, INRA, University of Bourgogne Franche-Comté, F-21000 Dijon, France
| | - C Lecomte
- Agroécologie, AgroSup Dijon, INRA, University of Bourgogne Franche-Comté, F-21000 Dijon, France
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Kawakami D, Yoshida T, Kanemaru Y, Huarhua Zaquinaula MH, Mizukami T, Arimoto M, Shibata T, Goto A, Enami Y, Amano H, Teraoka T, Komatsu K, Arie T. Induction of resistance to diseases in plant by aerial ultrasound irradiation. JOURNAL OF PESTICIDE SCIENCE 2019; 44:41-47. [PMID: 30820172 PMCID: PMC6389833 DOI: 10.1584/jpestics.d18-064] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Ultrasound, which refers to frequencies above the audible limit of human hearing, is a candidate for inducing resistance to pathogens in plants. We revealed that aerial ultrasound of 40.5 kHz could induce disease resistance in tomatoes and rice when the plants were irradiated with ultrasound of ca. 100 dB for 2 weeks during nursery season and reduced the incidence of Fusarium wilt and blast diseases, respectively, when plants were inoculated with pathogen 0 or 1 week after terminating irradiation. Disease control efficacy was also observed with ultrasound at frequencies of 19.8 and 28.9 kHz. However, cabbage yellows and powdery mildew on lettuce were not suppressed by ultrasound irradiation. No significant positive or negative effect on growth was observed in tomato and rice plants. RT-qPCR showed that the expression of PR1a involved in the salicylic acid (SA) signaling pathway was upregulated in the ultrasound-irradiated tomato.
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Affiliation(s)
- Daichi Kawakami
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183–8509, Japan
- Laboratory of Plant Pathology, Graduate School of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183–8509, Japan
| | - Takanobu Yoshida
- Institute of Agricultural Machinery NARO, Saitama 331–8537, Japan
| | - Yutaro Kanemaru
- Laboratory of Plant Pathology, Graduate School of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183–8509, Japan
| | | | | | - Michiko Arimoto
- Shiga Prefecture Agricultural Technology Promotion Center, Omihachiman 521–1301, Japan
| | - Takahiro Shibata
- Shiga Prefecture Agricultural Technology Promotion Center, Omihachiman 521–1301, Japan
| | | | - Yoshinari Enami
- Shiga Prefecture Agricultural Technology Promotion Center, Omihachiman 521–1301, Japan
| | | | - Tohru Teraoka
- Laboratory of Plant Pathology, Graduate School of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183–8509, Japan
| | - Ken Komatsu
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183–8509, Japan
- Laboratory of Plant Pathology, Graduate School of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183–8509, Japan
- Institute of Global Innovation Research (GIR), Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183–8509, Japan
| | - Tsutomu Arie
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183–8509, Japan
- Laboratory of Plant Pathology, Graduate School of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183–8509, Japan
- Institute of Global Innovation Research (GIR), Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183–8509, Japan
- To whom correspondence should be addressed. E-mail:
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Jelinski NA, Broz K, Jonkers W, Ma LJ, Kistler HC. Effector Gene Suites in Some Soil Isolates of Fusarium oxysporum Are Not Sufficient Predictors of Vascular Wilt in Tomato. PHYTOPATHOLOGY 2017; 107:842-851. [PMID: 28323535 DOI: 10.1094/phyto-12-16-0437-r] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Seventy-four Fusarium oxysporum soil isolates were assayed for known effector genes present in an F. oxysporum f. sp. lycopersici race 3 tomato wilt strain (FOL MN-25) obtained from the same fields in Manatee County, Florida. Based on the presence or absence of these genes, four haplotypes were defined, two of which represented 96% of the surveyed isolates. These two most common effector haplotypes contained either all or none of the assayed race 3 effector genes. We hypothesized that soil isolates with all surveyed effector genes, similar to FOL MN-25, would be pathogenic toward tomato, whereas isolates lacking all effectors would be nonpathogenic. However, inoculation experiments revealed that presence of the effector genes alone was not sufficient to ensure pathogenicity on tomato. Interestingly, a nonpathogenic isolate containing the full suite of unmutated effector genes (FOS 4-4) appears to have undergone a chromosomal rearrangement yet remains vegetatively compatible with FOL MN-25. These observations confirm the highly dynamic nature of the F. oxysporum genome and support the conclusion that pathogenesis among free-living populations of F. oxysporum is a complex process. Therefore, the presence of effector genes alone may not be an accurate predictor of pathogenicity among soil isolates of F. oxysporum.
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Affiliation(s)
- Nicolas A Jelinski
- First author: Department of Soil, Water and Climate, University of Minnesota-Twin Cities, 1991 Upper Buford Circle, Saint Paul 55108; second and fifth authors: U.S. Department of Agriculture-Agricultural Research Service, Cereal Disease Laboratory, 1551 Lindig Street, University of Minnesota-Twin Cities, Saint Paul 55108; third author: Bejo Zaden BV, Trambaan 1, 1749CZ Warmenhuizen, The Netherlands; and fourth author: Department of Biochemistry and Molecular Biology, University of Massachusetts-Amherst, Amherst 01003
| | - Karen Broz
- First author: Department of Soil, Water and Climate, University of Minnesota-Twin Cities, 1991 Upper Buford Circle, Saint Paul 55108; second and fifth authors: U.S. Department of Agriculture-Agricultural Research Service, Cereal Disease Laboratory, 1551 Lindig Street, University of Minnesota-Twin Cities, Saint Paul 55108; third author: Bejo Zaden BV, Trambaan 1, 1749CZ Warmenhuizen, The Netherlands; and fourth author: Department of Biochemistry and Molecular Biology, University of Massachusetts-Amherst, Amherst 01003
| | - Wilfried Jonkers
- First author: Department of Soil, Water and Climate, University of Minnesota-Twin Cities, 1991 Upper Buford Circle, Saint Paul 55108; second and fifth authors: U.S. Department of Agriculture-Agricultural Research Service, Cereal Disease Laboratory, 1551 Lindig Street, University of Minnesota-Twin Cities, Saint Paul 55108; third author: Bejo Zaden BV, Trambaan 1, 1749CZ Warmenhuizen, The Netherlands; and fourth author: Department of Biochemistry and Molecular Biology, University of Massachusetts-Amherst, Amherst 01003
| | - Li-Jun Ma
- First author: Department of Soil, Water and Climate, University of Minnesota-Twin Cities, 1991 Upper Buford Circle, Saint Paul 55108; second and fifth authors: U.S. Department of Agriculture-Agricultural Research Service, Cereal Disease Laboratory, 1551 Lindig Street, University of Minnesota-Twin Cities, Saint Paul 55108; third author: Bejo Zaden BV, Trambaan 1, 1749CZ Warmenhuizen, The Netherlands; and fourth author: Department of Biochemistry and Molecular Biology, University of Massachusetts-Amherst, Amherst 01003
| | - H Corby Kistler
- First author: Department of Soil, Water and Climate, University of Minnesota-Twin Cities, 1991 Upper Buford Circle, Saint Paul 55108; second and fifth authors: U.S. Department of Agriculture-Agricultural Research Service, Cereal Disease Laboratory, 1551 Lindig Street, University of Minnesota-Twin Cities, Saint Paul 55108; third author: Bejo Zaden BV, Trambaan 1, 1749CZ Warmenhuizen, The Netherlands; and fourth author: Department of Biochemistry and Molecular Biology, University of Massachusetts-Amherst, Amherst 01003
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Shahzad R, Khan AL, Bilal S, Asaf S, Lee IJ. Plant growth-promoting endophytic bacteria versus pathogenic infections: an example of Bacillus amyloliquefaciens RWL-1 and Fusarium oxysporum f. sp. lycopersici in tomato. PeerJ 2017; 5:e3107. [PMID: 28321368 PMCID: PMC5357341 DOI: 10.7717/peerj.3107] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 02/20/2017] [Indexed: 12/29/2022] Open
Abstract
Fungal pathogenic attacks are one of the major threats to the growth and productivity of crop plants. Currently, instead of synthetic fungicides, the use of plant growth-promoting bacterial endophytes has been considered intriguingly eco-friendly in nature. Here, we aimed to investigate the in vitro and in vivo antagonistic approach by using seed-borne endophytic Bacillus amyloliquefaciens RWL-1 against pathogenic Fusarium oxysporum f. sp. lycopersici. The results revealed significant suppression of pathogenic fungal growth by Bacillus amyloliquefaciens in vitro. Further to this, we inoculated tomato plants with RWL-1 and F. oxysporum f. sp. lycopersici in the root zone. The results showed that the growth attributes and biomass were significantly enhanced by endophytic-inoculation during disease incidence as compared to F. oxysporum f. sp. lycopersici infected plants. Under pathogenic infection, the RWL-1-applied plants showed increased amino acid metabolism of cell wall related (e.g., aspartic acid, glutamic acid, serine (Ser), and proline (Pro)) as compared to diseased plants. In case of endogenous phytohormones, significantly lower amount of jasmonic acid (JA) and higher amount of salicylic acid (SA) contents was recorded in RWL-1-treated diseased plants. The phytohormones regulation in disease incidences might be correlated with the ability of RWL-1 to produce organic acids (e.g., succinic acid, acetic acid, propionic acid, and citric acid) during the inoculation and infection of tomato plants. The current findings suggest that RWL-1 inoculation promoted and rescued plant growth by modulating defense hormones and regulating amino acids. This suggests that bacterial endophytes could be used for possible control of F. oxysporum f. sp. lycopersici in an eco-friendly way.
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Affiliation(s)
- Raheem Shahzad
- School of Applied Biosciences, Kyungpook National University, Daegu, South Korea
| | - Abdul Latif Khan
- Chair of Oman’s Medicinal Plants & Marine Natural Products, University of Nizwa, Nizwa, Oman
| | - Saqib Bilal
- School of Applied Biosciences, Kyungpook National University, Daegu, South Korea
| | - Sajjad Asaf
- School of Applied Biosciences, Kyungpook National University, Daegu, South Korea
| | - In-Jung Lee
- School of Applied Biosciences, Kyungpook National University, Daegu, South Korea
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Kashiwa T, Kozaki T, Ishii K, Turgeon BG, Teraoka T, Komatsu K, Arie T. Sequencing of individual chromosomes of plant pathogenic Fusarium oxysporum. Fungal Genet Biol 2016; 98:46-51. [PMID: 27919652 DOI: 10.1016/j.fgb.2016.12.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 11/19/2016] [Accepted: 12/01/2016] [Indexed: 11/29/2022]
Abstract
A small chromosome in reference isolate 4287 of F. oxysporum f. sp. lycopersici (Fol) has been designated as a 'pathogenicity chromosome' because it carries several pathogenicity related genes such as the Secreted In Xylem (SIX) genes. Sequence assembly of small chromosomes in other isolates, based on a reference genome template, is difficult because of karyotype variation among isolates and a high number of sequences associated with transposable elements. These factors often result in misassembly of sequences, making it unclear whether other isolates possess the same pathogenicity chromosome harboring SIX genes as in the reference isolate. To overcome this difficulty, single chromosome sequencing after Contour-clamped Homogeneous Electric Field (CHEF) separation of chromosomes was performed, followed by de novo assembly of sequences. The assembled sequences of individual chromosomes were consistent with results of probing gels of CHEF separated chromosomes with SIX genes. Individual chromosome sequencing revealed that several SIX genes are located on a single small chromosome in two pathogenic forms of F. oxysporum, beyond the reference isolate 4287, and in the cabbage yellows fungus F. oxysporum f. sp. conglutinans. The particular combination of SIX genes on each small chromosome varied. Moreover, not all SIX genes were found on small chromosomes; depending on the isolate, some were on big chromosomes. This suggests that recombination of chromosomes and/or translocation of SIX genes may occur frequently. Our method improves sequence comparison of small chromosomes among isolates.
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Affiliation(s)
- Takeshi Kashiwa
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183-8509, Japan; Present address: Chemical Biology Research Group, RIKEN Center for Sustainable Resource Science (CSRS), Wako, Saitama 351-0198, Japan
| | - Toshinori Kozaki
- Graduate School of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183-8509, Japan
| | - Kazuo Ishii
- Graduate School of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183-8509, Japan
| | - B Gillian Turgeon
- Plant Pathology and Plant-Microbe Biology Section, School of Integrative Plant Science, Cornell University, Ithaca, NY 14853, USA; Institute of Global Innovation Research, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183-8509, Japan
| | - Tohru Teraoka
- Graduate School of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183-8509, Japan
| | - Ken Komatsu
- Graduate School of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183-8509, Japan; Institute of Global Innovation Research, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183-8509, Japan
| | - Tsutomu Arie
- Graduate School of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183-8509, Japan; Institute of Global Innovation Research, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183-8509, Japan.
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Kashiwa T, Suzuki T, Sato A, Akai K, Teraoka T, Komatsu K, Arie T. A new biotype of Fusarium oxysporum f. sp. lycopersici race 2 emerged by a transposon-driven mutation of avirulence gene AVR1. FEMS Microbiol Lett 2016; 363:fnw132. [PMID: 27190160 DOI: 10.1093/femsle/fnw132] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/15/2016] [Indexed: 11/14/2022] Open
Abstract
Emergence of races in Fusarium oxysporum f. sp. lycopersici (Fol) is caused by loss or mutation of at least one avirulence (AVR) gene. The product of AVR1 is a small protein (Avr1) secreted by Fol in tomato xylem sap during infection. This protein triggers Fol race 1 specific resistance (I) in tomato, indicating that AVR1 is an AVR gene. Deletion of AVR1 in race 1 resulted in the emergence of race 2, and an additional mutation in AVR2 generated race 3. Previously, we reported a new biotype of race 3, KoChi-1, in which AVR1 was truncated by a transposon Hormin, which suggested a new route to evolution of races in Fol However, to date no race 2 isolate carrying Hormin-truncated AVR1 has been reported. In this report, we describe such isolates, represented by Chiba-5, in which Hormin insertion occurred in AVR1 at a position different from that in KoChi-1. AVR1 truncation in both isolates resulted in production of defective Avr1 proteins. Chiba-5 and KoChi-1 belong to different phylogenetic clades, A1 and A2, respectively, suggesting that insertion of Hormin in AVR1 in Chiba-5 and KoChi-1 occurred as independent evolutionary events.
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Affiliation(s)
- Takeshi Kashiwa
- Graduate School of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183-8509, Japan
| | - Tatsuya Suzuki
- Chiba Prefectural Agriculture and Forestry Research Center, 808 Daizenno-cho, Midori-ku, Chiba 266-0006, Japan
| | - Akira Sato
- Graduate School of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183-8509, Japan
| | - Kotaro Akai
- Graduate School of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183-8509, Japan
| | - Tohru Teraoka
- Graduate School of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183-8509, Japan
| | - Ken Komatsu
- Graduate School of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183-8509, Japan
| | - Tsutomu Arie
- Graduate School of Agriculture, Tokyo University of Agriculture and Technology (TUAT), Fuchu, Tokyo 183-8509, Japan
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