Zhan, Jiasui
- Institutionen för skoglig mykologi och växtpatologi, Sveriges lantbruksuniversitet
- Fujian Agriculture and Forestry University
Sammanfattning
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.
Nyckelord
acclimation; aggressiveness; fitness; Phytophthora infestans; thermal adaptation
Publicerad i
Evolutionary applications
2020, volym: 13, nummer: 4, sidor: 768-780
Utgivare: WILEY
SLU författare
Associerade SLU-program
SLU Nätverk växtskydd
Globala målen (SDG)
SDG2 Ingen hunger
SDG13 Bekämpa klimatförändringarna
UKÄ forskningsämne
Jordbruksvetenskap
Evolutionsbiologi
Publikationens identifierare
- DOI: https://doi.org/10.1111/eva.12899
Permanent länk till denna sida (URI)
https://res.slu.se/id/publ/105198