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Kurose D, Seier MK, Evans HC. Exploiting exotic pathogens as mycoherbicides against invasive alien weeds: Japanese knotweed as a case study. PEST MANAGEMENT SCIENCE 2024; 80:87-91. [PMID: 37086042 DOI: 10.1002/ps.7510] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Revised: 03/30/2023] [Accepted: 04/22/2023] [Indexed: 05/03/2023]
Abstract
Plant species have been introduced increasingly into non-native ranges, where many have become exotic weeds with adverse impacts on native ecosystems, as well as on farming and other livelihoods. In biological control, the classical or inoculative approach is the one most commonly used for the management of invasive alien weeds and is based on the use of co-evolved natural enemies from the native range to control the invasive weed. Typically, the inundative or mycoherbicide approach targets problematic weeds using local plant pathogens that, in the case of introduced species, have 'jumped' onto the exotic host. The leaf-spot fungus, Mycosphaerella polygoni-cuspidati, co-evolved with its host, Reynoutria (Fallopia) japonica (Japanese knotweed), in Japan and has a unique history of being investigated both as a classical biological control agent and a mycoherbicide against this highly invasive weed in the United Kingdom and North America. Here, we highlight our research on M. polygoni-cuspidati as part of a biological control programme for Japanese knotweed and review the potential of mycoherbicides using exotic pathogens for the management of invasive alien weeds. © 2023 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Guo J, Fan F, Wang W, Wan M, Li Y. Development of PMA-qPCR assay to accurately and reproducible quantify viable bacteria of Paenibacillus polymyxa. Lett Appl Microbiol 2023; 76:ovad127. [PMID: 37952090 DOI: 10.1093/lambio/ovad127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Revised: 10/04/2023] [Accepted: 11/09/2023] [Indexed: 11/14/2023]
Abstract
Paenibacillus polymyxa is an important biocontrol bacterium. The combination of propidium monoazide (PMA) and quantitative polymerase chain reactionq (qPCR) has proven effective in quantifying live bacteria from various microorganisms. The objective was to create a PMA-qPCR assay to precisely and consistently measure the number of living bacteria of biocontrol P. polymyxa. The primers were designed for the spo0A gene of P. polymyxa HY96-2. The optimal conditions for treating the target strain with PMA were a PMA concentration of 15 μg/mL, an incubation time of 5 min, and an exposure time of 10 min. The PMA-qPCR method had a limit of quantification (LOQ) of 1.0 × 103 CFU/mL for measuring the amount of viable P. polymyxa bacteria. The PMA-qPCR method is more sensitive than the qPCR method in detecting viable bacteria in the mixtures of viable and dead bacteria. The accuracy and reproducibility of quantifying viable P. polymyxa bacteria using the PMA-qPCR method were higher compared to the plate count method.
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Affiliation(s)
- Jiacai Guo
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Fei Fan
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Weiliang Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Minxi Wan
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Yuanguang Li
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China
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Guo J, Wang W, Zhao H, Luo Y, Wan M, Li Y. A new PMA-qPCR method for rapid and accurate detection of viable bacteria and spores of marine-derived Bacillus velezensis B-9987. J Microbiol Methods 2022; 199:106537. [DOI: 10.1016/j.mimet.2022.106537] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 06/29/2022] [Accepted: 06/30/2022] [Indexed: 12/27/2022]
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Zhang S, Ma Y, Jiang W, Meng L, Cao X, Hu J, Chen J, Li J. Development of a Strain-Specific Quantification Method for Monitoring Bacillus amyloliquefaciens TF28 in the Rhizospheric Soil of Soybean. Mol Biotechnol 2020; 62:521-533. [PMID: 32840729 DOI: 10.1007/s12033-020-00268-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/14/2020] [Indexed: 10/23/2022]
Abstract
Bacillus amyloliquefaciens TF28 can be used to control soybean root disease. To assess its commercial potential as a biocontrol agent, it is necessary to develop a strain-specific quantification method to monitor its colonization dynamics in the rhizospheric soil of soybean under field conditions. Based on genomic comparison with the same species in NCBI databases, a strain-unique gene ukfpg was used as molecular marker to develop strain-specific PCR assay. Among three primer pairs, only primer pairs (F2/R2) could specifically differentiate TF28 from other strains of B. amyloliquefaciens with the detection limit of 10 fg and 100 CFU/g for DNA extracted from pure culture and dry soil, respectively. Then, a colony count coupled with PCR assay was used to monitor the population of TF28 in the rhizospheric soil of soybean in the field. The results indicated that TF28 successfully colonized in the rhizospheric soil of soybean. The colonization population of TF28 changed dynamically within the 120-day growth period with high population at the branching (V6) and flowering stages (R2). This study provides an efficient method to quantitatively monitor the colonization dynamics of TF28 in the rhizospheric soil of soybean in the field and demonstrates the potential of TF28 as a biocontrol agent for commercial development.
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Affiliation(s)
- Shumei Zhang
- Institute of Microbiology, Heilongjiang Academy of Sciences, 68 Zhaolin Street, Daoli District, Harbin, 150010, Heilongjiang, China
- Institute of Advanced Technology, Heilongjiang Academy of Sciences, Harbin, 150020, China
| | - Yinpeng Ma
- Institute of Advanced Technology, Heilongjiang Academy of Sciences, Harbin, 150020, China
| | - Wei Jiang
- Institute of Microbiology, Heilongjiang Academy of Sciences, 68 Zhaolin Street, Daoli District, Harbin, 150010, Heilongjiang, China
- Institute of Advanced Technology, Heilongjiang Academy of Sciences, Harbin, 150020, China
| | - Liqiang Meng
- Institute of Microbiology, Heilongjiang Academy of Sciences, 68 Zhaolin Street, Daoli District, Harbin, 150010, Heilongjiang, China
- Institute of Advanced Technology, Heilongjiang Academy of Sciences, Harbin, 150020, China
| | - Xu Cao
- Institute of Microbiology, Heilongjiang Academy of Sciences, 68 Zhaolin Street, Daoli District, Harbin, 150010, Heilongjiang, China
- Institute of Advanced Technology, Heilongjiang Academy of Sciences, Harbin, 150020, China
| | - Jihua Hu
- Institute of Advanced Technology, Heilongjiang Academy of Sciences, Harbin, 150020, China
| | - Jingyu Chen
- Institute of Advanced Technology, Heilongjiang Academy of Sciences, Harbin, 150020, China
| | - Jing Li
- Institute of Microbiology, Heilongjiang Academy of Sciences, 68 Zhaolin Street, Daoli District, Harbin, 150010, Heilongjiang, China.
- Institute of Advanced Technology, Heilongjiang Academy of Sciences, Harbin, 150020, China.
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Singh P, Gobbi A, Santoni S, Hansen LH, This P, Péros JP. Assessing the impact of plant genetic diversity in shaping the microbial community structure of Vitis vinifera phyllosphere in the Mediterranean. FRONTIERS IN LIFE SCIENCE 2018. [DOI: 10.1080/21553769.2018.1552628] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Prashant Singh
- AGAP, Univ Montpellier, CIRAD, INRA, Montpellier SupAgro, Montpellier, France
| | - Alex Gobbi
- Department of Environmental Science, Aarhus University, Roskilde, Denmark
| | - Sylvain Santoni
- AGAP, Univ Montpellier, CIRAD, INRA, Montpellier SupAgro, Montpellier, France
| | - Lars H Hansen
- Department of Environmental Science, Aarhus University, Roskilde, Denmark
| | - Patrice This
- AGAP, Univ Montpellier, CIRAD, INRA, Montpellier SupAgro, Montpellier, France
| | - Jean-Pierre Péros
- AGAP, Univ Montpellier, CIRAD, INRA, Montpellier SupAgro, Montpellier, France
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