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Rapid adaptation of the Irish potato famine pathogen Phytophthora infestans to changing temperature

文献类型： 外文期刊

作者： Wu, E-Jiao 1 ; Wang, Yan-Ping 1 ; Yahuza, Lurwanu 1 ; He, Meng-Han 1 ; Sun, Dan-Li 1 ; Huang, Yan-Mei 1 ; Liu, Yu-Chan 1 ;

作者机构： 1.Fujian Agr & Forestry Univ, Key Lab Biopesticide & Chem Biol, Minist Educ, Fuzhou, Peoples R China

2.Fujian Agr & Forestry Univ, Inst Plant Virol, Fujian Key Lab Plant Virol, Fuzhou 350002, Peoples R China

3.Jiangsu Acad Agr Sci, Inst Pomol, Jiangsu Key Lab Hort Crop Genet Improvement, Nanjing, Peoples R China

4.Henan Agr Univ, Coll Plant Protect, Zhengzhou, Peoples R China

5.Fujian Agr & Forestry Univ, State Key Lab Ecol Pest Control Fujian & Taiwan C, Fuzhou, Peoples R China

6.Swedish Univ Agr Sci, Dept Forest Mycol & Plant Pathol, Uppsala, Sweden

关键词： acclimation; aggressiveness; fitness; Phytophthora infestans; thermal adaptation

期刊名称：EVOLUTIONARY APPLICATIONS （ 影响因子：5.183； 五年影响因子：5.725 ）

ISSN： 1752-4571

年卷期： 2020 年 13 卷 4 期

页码：

收录情况： SCI

摘要： Temperature plays a multidimensional role in host-pathogen interactions. As an important element of climate change, elevated world temperature resulting from global warming presents new challenges to sustainable disease management. Knowledge of pathogen adaptation to global warming is needed to predict future disease epidemiology and formulate mitigating strategies. In this study, 21 Phytophthora infestans isolates originating from seven thermal environments were acclimated for 200 days under stepwise increase or decrease of experimental temperatures and evolutionary responses of the isolates to the thermal changes were evaluated. We found temperature acclimation significantly increased the fitness and genetic adaptation of P. infestans isolates at both low and high temperatures. Low-temperature acclimation enforced the countergradient adaptation of the pathogen to its past selection and enhanced the positive association between the pathogen's intrinsic growth rate and aggressiveness. At high temperatures, we found that pathogen growth collapsed near the maximum temperature for growth, suggesting a thermal niche boundary may exist in the evolutionary adaptation of P. infestans. These results indicate that pathogens can quickly adapt to temperature shifts in global warming. If this is associated with environmental conditions favoring pathogen spread, it will threaten future food security and human health and require the establishment of mitigating actions.

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