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Plant diversity ameliorates the evolutionary development of fungicide resistance in an agricultural ecosystem

Yang, Li-Na and Nkurikiyimfura, Oswald and Pan, Zhe-Chao and Wang, Yan-Ping and Waheed, Abdul and Chen, Ruey-Shyang and Burdon, Jeremy J. and Sui, Qi-Jun and Zhan, Jiasui (2021). Plant diversity ameliorates the evolutionary development of fungicide resistance in an agricultural ecosystem. Journal of Applied Ecology. 58 , 2566-2578
[Research article]

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Abstract

1. The evolution of fungicide resistance in agricultural and natural ecosystems is associated with the biology of pathogens, the chemical property and application strategies of the fungicides. The influence of ecological factors such as host diversity on the evolution of fungicide resistance has been largely overlooked but is highly relevant to social and natural sustainability. In this study, we used an experimental evolution approach to understand how host population heterogeneity may affect the evolution of fungicide resistance in the associated pathogens.2. Potato populations with six levels of genetic heterogeneity were grown in the same field and naturally infected by Phytophthora infestans. Pathogen isolates (similar to 1,200) recovered from the field experiment were molecularly genotyped. Genetically distinct isolates were selected from each population and 142 isolates were assayed for their tolerance to two fungicides differing in the mode of action. Tolerance was determined by calculating the relative growth rate of the isolates in the presence and absence of fungicides and the effective concentration for 50% inhibition.3. The evolution of fungicide resistance in P. infestans was affected by the genetic variation of host populations. Higher potato diversification increased the sensitivity of P. infestans to both fungicides and reduced genetic variation of the pathogen available for the development of fungicide resistance. These mitigating effects are independent of biochemical properties of fungicides and are likely caused by host selection for pathogen strains differing in the ability of fungicide influxes, effluxes or detoxification rather than mutations in fungicide target genes.4. Synthesis and applications. The development of fungicide resistance greatly threatens food security and ecological sustainability, and it is urgent need to develop agricultural practices which can ameliorate this problem. Our results show that potato crop with a higher genetic diversity is associated with a late blight pathogen of higher fungicide sensitivity and lower potential of developing fungicide resistance, indicating that agricultural diversification such as through cultivar mixture can reduce the application dose and frequency of fungicides needed to achieve the same level of disease control, which, in turn, further reduce the selection pressure acting on the pathogen populations and the evolutionary risk of developing fungicide resistance in pathogens. Together with benefits documented in other studies, our results indicate that crop diversification is an eco-friendly approach that not only ameliorate fungicide resistance but also help achieve social and ecological sustainability by balancing the interaction among food security, socio-economic development and ecological resilience and should be promoted.

Authors/Creators:Yang, Li-Na and Nkurikiyimfura, Oswald and Pan, Zhe-Chao and Wang, Yan-Ping and Waheed, Abdul and Chen, Ruey-Shyang and Burdon, Jeremy J. and Sui, Qi-Jun and Zhan, Jiasui
Title:Plant diversity ameliorates the evolutionary development of fungicide resistance in an agricultural ecosystem
Series Name/Journal:Journal of Applied Ecology
Year of publishing :2021
Volume:58
Page range:2566-2578
Number of Pages:13
Publisher:WILEY
ISSN:0021-8901
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Microbiology (Microbiology in the medical area to be 30109)
Keywords:biodiversity, disease management, fungicide resistance, mode of action, natural selection, Phytophthora infestans, plant pathogens, sustainability
URN:NBN:urn:nbn:se:slu:epsilon-p-113194
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-113194
Additional ID:
Type of IDID
DOI10.1111/1365-2664.13978
Web of Science (WoS)000682510200001
ID Code:26195
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Forest Mycology and Plant Pathology
(S) > Dept. of Forest Mycology and Plant Pathology
Deposited By: SLUpub Connector
Deposited On:23 Nov 2021 06:25
Metadata Last Modified:23 Nov 2021 06:31

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