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Pan S, Wei P, Li Y, Chen Z, Peng D, Wang L, Liu C, Hong B, Zhang F, Li Y. Identification of Meloidogyne Species on Traditional Chinese Medicine Plants in the Qinling Mountain Area of China and Their Aggressiveness to Different Medicinal Herbs. PLANT DISEASE 2024; 108:1202-1210. [PMID: 37849284 DOI: 10.1094/pdis-01-23-0148-re] [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: 10/19/2023]
Abstract
Root-knot nematodes (Meloidogyne spp.) are plant-parasitic nematodes that cause serious damage worldwide. There are many species of traditional Chinese medicine (TCM) plants, but only a few have been reported to be infected by Meloidogyne species. From 2020 to 2022, a survey was conducted in the Qinling mountain area, which is the main production region of TCM plants in China. Obvious galling symptoms were observed on the root systems of 15 species of TCM plants. Females were collected from diverse diseased TCM plants and subsequently identified at morphological and molecular levels. Among the 20 diseased root samples collected, Meloidogyne hapla populations were identified in 12 samples (60%), and M. incognita populations were identified in eight samples (40%). Among the 15 species of diseased TCM plants, eight species, namely, Scutellaria baicalensis, Leonurus japonicus, Dioscorea zingiberensis, Cornus officinalis, Viola philippica, Achyranthes bidentata, Senecio scandens, and Plantago depressa, were reported to be infected by Meloidogyne species for the first time. The host status of five species of TCM plants for two M. hapla isolates and one M. incognita isolate from TCM plants in this study was then evaluated. Differences in TCM plants' response to nematode infection were apparent when susceptibility was evaluated by the egg counts per gram of fresh root and the reproduction factor of the nematodes. Among the five species of TCM plants tested, Salvia miltiorrhiza and Gynostemma pentaphyllum were the most susceptible, while S. baicalensis and V. philippica were not considered suitable hosts for M. hapla or M. incognita.
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Affiliation(s)
- Song Pan
- Shaanxi Key Laboratory of Plant Nematology, Bio-Agriculture Institute of Shaanxi, Shaanxi Academy of Sciences, Xi'an 710043, China
| | - Peiyao Wei
- Shaanxi Key Laboratory of Plant Nematology, Bio-Agriculture Institute of Shaanxi, Shaanxi Academy of Sciences, Xi'an 710043, China
| | - Yu Li
- Ankang Academy of Agricultural Sciences, Ankang 725021, China
| | - Zhijie Chen
- Shaanxi Key Laboratory of Plant Nematology, Bio-Agriculture Institute of Shaanxi, Shaanxi Academy of Sciences, Xi'an 710043, China
| | - Deliang Peng
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Li Wang
- Xianyang Vocational Technical College, Xi'an 712000, China
| | - Chen Liu
- Shaanxi Key Laboratory of Plant Nematology, Bio-Agriculture Institute of Shaanxi, Shaanxi Academy of Sciences, Xi'an 710043, China
| | - Bo Hong
- Shaanxi Key Laboratory of Plant Nematology, Bio-Agriculture Institute of Shaanxi, Shaanxi Academy of Sciences, Xi'an 710043, China
| | - Feng Zhang
- Shaanxi Key Laboratory of Plant Nematology, Bio-Agriculture Institute of Shaanxi, Shaanxi Academy of Sciences, Xi'an 710043, China
| | - Yingmei Li
- Shaanxi Key Laboratory of Plant Nematology, Bio-Agriculture Institute of Shaanxi, Shaanxi Academy of Sciences, Xi'an 710043, China
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Trinh QP, Le TML, Nguyen TD, Nguyen HT. Morphologic, Morphometric, and Molecular Characterization of Vietnamese Populations of Meloidogyne incognita. PLANT DISEASE 2023; 107:3693-3700. [PMID: 37415354 DOI: 10.1094/pdis-04-23-0818-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: 07/08/2023]
Abstract
Meloidogyne incognita is considered the most damaging and common root-knot nematode to numerous host plants worldwide. During a survey of nematodes in Vietnam, 1,106 samples from 22 different plant species were collected. M. incognita was recorded on 13 of the 22 host plants. Four populations of M. incognita from four host plants were chosen for comparison and confirmation of their morphologic, morphometric, and molecular characteristics. Genetically based phylogenetic trees were constructed to show relationships among root-knot nematodes. Molecular barcodes of four gene regions, ITS, D2-D3 of 28S rRNA, COI, and Nad5 mtDNA, integrated with morphologic and morphometric data were used as reliable references for molecular identification of M. incognita. Our analyses indicated that tropical root-knot nematodes are very similar in characterization of ITS, D2-D3 of 28S rRNA, and COI regions. However, these gene regions can be used to separate the tropical root-knot nematode group from other groups. On the other hand, the analysis of Nad5 mtDNA and multiplex-PCR with specific primers can be used to distinguish tropical species.
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Affiliation(s)
- Quang Phap Trinh
- Institute of Ecology and Biological Resources, Vietnam Academy of Sciences and Technology, 100000 Hanoi, Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Sciences and Technology, 100000 Hanoi, Vietnam
| | - Thi Mai Linh Le
- Institute of Ecology and Biological Resources, Vietnam Academy of Sciences and Technology, 100000 Hanoi, Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Sciences and Technology, 100000 Hanoi, Vietnam
| | - Thi Duyen Nguyen
- Institute of Ecology and Biological Resources, Vietnam Academy of Sciences and Technology, 100000 Hanoi, Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Sciences and Technology, 100000 Hanoi, Vietnam
| | - Huu Tien Nguyen
- Institute of Ecology and Biological Resources, Vietnam Academy of Sciences and Technology, 100000 Hanoi, Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Sciences and Technology, 100000 Hanoi, Vietnam
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Investigation of the soil nematode community composition in a monoculture Robusta coffee plantation in Dak Lak, Vietnam. Glob Ecol Conserv 2021. [DOI: 10.1016/j.gecco.2021.e01932] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Duong B, Nguyen HX, Phan HV, Colella S, Trinh PQ, Hoang GT, Nguyen TT, Marraccini P, Lebrun M, Duponnois R. Identification and characterization of Vietnamese coffee bacterial endophytes displaying in vitro antifungal and nematicidal activities. Microbiol Res 2020; 242:126613. [PMID: 33070050 DOI: 10.1016/j.micres.2020.126613] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 09/25/2020] [Accepted: 09/27/2020] [Indexed: 12/16/2022]
Abstract
The endophytic bacteria were isolated from coffee roots and seeds in Vietnam and identified with 16S rDNA sequencing as belonging to the Actinobacteria, Firmicutes and Proteobacteria phyla with the Nocardia, Bacillus and Burkholderia as dominant genera, respectively. Out of the thirty genera recovered from Coffea canephora and Coffea liberica, twelve were reported for the first time in endophytic association with coffee including members of the genera Brachybacterium, Caballeronia, Kitasatospora, Lechevalieria, Leifsonia, Luteibacter, Lysinibacillus, Mycolicibacterium, Nakamurella, Paracoccus, Sinomonas and Sphingobium. A total of eighty bacterial endophytes were characterized in vitro for several plant growth promoting and biocontrol traits including: the phosphate solubilization, the indolic compounds, siderophores, HCN, esterase, lipase, gelatinase and chitinase production. A subset of fifty selected bacteria were tested for their potential as biocontrol agents with in vitro confrontations with the fungal pathogen Fusarium oxysporum as well as the coffee parasitic nematodes Radopholus duriophilus and Pratylenchus coffeae. The three most efficient isolates on F. oxysporum belonging to the Bacillus, Burkholderia, and Streptomyces genera displayed a growth inhibition rate higher than 40%. Finally, five isolates from the Bacillus genus were able to lead to 100% of mortality in 24 h on both R. duriophilus and P. coffeae.
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Affiliation(s)
- Benoit Duong
- LSTM, Univ. Montpellier, IRD, CIRAD, INRAE, SupAgro, Montpellier, France; LMI RICE-2, Univ. Montpellier, IRD, AGI, USTH, Hanoi, Viet Nam.
| | | | | | - Stefano Colella
- LSTM, Univ. Montpellier, IRD, CIRAD, INRAE, SupAgro, Montpellier, France.
| | - Phap Quang Trinh
- Institute of Ecology and Biological Resources, VAST, Hanoi, Viet Nam; Graduate Univ. of Science and Technology, VAST, Hanoi, Viet Nam.
| | - Giang Thi Hoang
- LMI RICE-2, Univ. Montpellier, IRD, AGI, USTH, Hanoi, Viet Nam; National Key Laboratory for Plant Cell Biotechnology, AGI, Hanoi, Viet Nam.
| | | | - Pierre Marraccini
- LMI RICE-2, Univ. Montpellier, IRD, AGI, USTH, Hanoi, Viet Nam; IPME, Univ. Montpellier, CIRAD, IRD, Montpellier, France.
| | - Michel Lebrun
- LSTM, Univ. Montpellier, IRD, CIRAD, INRAE, SupAgro, Montpellier, France; LMI RICE-2, Univ. Montpellier, IRD, AGI, USTH, Hanoi, Viet Nam.
| | - Robin Duponnois
- LSTM, Univ. Montpellier, IRD, CIRAD, INRAE, SupAgro, Montpellier, France.
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Occurrence of endophytic bacteria in Vietnamese Robusta coffee roots and their effects on plant parasitic nematodes. Symbiosis 2019. [DOI: 10.1007/s13199-019-00649-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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A New Root-knot Nematode, Meloidogyne Moensi n. Sp. (Nematoda: Meloidogynidae), Parasitizing Robusta Coffee from Western Highlands, Vietnam. Helminthologia 2019; 56:229-246. [PMID: 31662695 PMCID: PMC6799579 DOI: 10.2478/helm-2019-0014] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 03/14/2019] [Indexed: 11/20/2022] Open
Abstract
A new root-knot nematode, parasitizing Robusta coffee in Dak Lak Province, Western Highlands of Vietnam, is described as Meloidogyne moensi n. sp. Morphological and molecular analyses demonstrated that this species differs clearly from other previously described root-knot nematodes. Morphologically, the new species is characterized by a swollen body of females with a small posterior protuberance that elongated from ovoid to saccate; perineal patterns with smooth striae, continuous and low dorsal arch; lateral lines marked as a faint space or linear depression at junction of the dorsal and ventral striate; distinct phasmids; perivulval region free of striae; visible and wide tail terminus surrounding by concentric circles of striae; medial lips of females in dumbbell-shaped and slightly raised above lateral lips; female stylet is normally straight with posteriorly sloping stylet knobs; lip region of second stage juvenile (J2) is not annulated; medial lips and labial disc of J2 formed dumbbell shape; lateral lips are large and triangular; tail of J2 is conoid with rounded unstriated tail tip; distinct phasmids and hyaline; dilated rectum. Meloidogyne moensi n. sp. is most similar to M. africana, M. ottersoni by prominent posterior protuberance. Results of molecular analysis of rDNA sequences including the D2-D3 expansion regions of 28S rDNA, COI, and partial COII/16S rRNA of mitochondrial DNA support for the new species status.
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Coyne DL, Cortada L, Dalzell JJ, Claudius-Cole AO, Haukeland S, Luambano N, Talwana H. Plant-Parasitic Nematodes and Food Security in Sub-Saharan Africa. ANNUAL REVIEW OF PHYTOPATHOLOGY 2018; 56:381-403. [PMID: 29958072 PMCID: PMC7340484 DOI: 10.1146/annurev-phyto-080417-045833] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Sub-Saharan Africa (SSA) is a region beset with challenges, not least its ability to feed itself. Low agricultural productivity, exploding populations, and escalating urbanization have led to declining per capita food availability. In order to reverse this trend, crop production systems must intensify, which brings with it an elevated threat from pests and diseases, including plant-parasitic nematodes. A holistic systems approach to pest management recognizes disciplinary integration. However, a critical under-representation of nematology expertise is a pivotal shortcoming, especially given the magnitude of the threat nematodes pose under more intensified systems. With more volatile climates, efficient use of water by healthy root systems is especially crucial. Within SSA, smallholder farming systems dominate the agricultural landscape, where a limited understanding of nematode problems prevails. This review provides a synopsis of current nematode challenges facing SSA and presents the opportunities to overcome current shortcomings, including a means to increase nematology capacity.
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Affiliation(s)
- Danny L Coyne
- International Institute of Tropical Agriculture, Kasarani, Nairobi, Kenya;
| | - Laura Cortada
- International Institute of Tropical Agriculture, Kasarani, Nairobi, Kenya;
| | - Johnathan J Dalzell
- Queen's University Belfast, School of Biological Sciences, Medical Biology Centre, Belfast, BT9 7BL, United Kingdom
| | - Abiodun O Claudius-Cole
- Department of Crop Protection and Environmental Biology, University of Ibadan, Ibadan, Nigeria
| | - Solveig Haukeland
- International Centre for Insect Physiology and Ecology, Kasarani, Nairobi, Kenya
| | | | - Herbert Talwana
- Department of Agricultural Production, School of Agricultural Sciences, Makerere University, Kampala, Uganda
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