Descrizione del progetto
Prevedere gli impatti dei cambiamenti climatici sulle interazioni fra piante e patogeni
Numerosi studi sulle interazioni molecolari fra piante e patogeni hanno sondato le combinazioni precise di geni dell’ospite e del patogeno che determinano la suscettibilità o la resistenza. Anche se preziose, le prove di laboratorio non riescono a prevedere direttamente quando e dove una malattia si svilupperà (patogenesi) nelle popolazioni di piante naturali o agricole, poiché anche i fattori ambientali svolgono un ruolo in questo processo. Il progetto PathoGenoPredict, finanziato dall’UE, elaborerà un quadro che consenta agli scienziati di prevedere la patogenesi delle piante e di tenere conto della variazione spazio-temporale nella genetica dell’ospite e del patogeno nel paesaggio e nel tempo. Il ricercatore responsabile del progetto studierà l’interazione genetica di Hyaloperonospora arabidopsidis, un organismo fungino conosciuto come oomicete, e la pianta modello Arabidopsis thaliana nel paesaggio, producendo mappe sia per il clima di oggi che per i cambiamenti climatici futuri previsti.
Obiettivo
Plants and their pathogens are locked in an ongoing coevolutionary battle, with outcomes affecting food and environmental security. Pathogenesis can occur when a host's resistance and pathogen's virulence genotypes are compatible with infection, while incompatible genotypes lead to resistance. A myriad of studies of molecular plant-pathogen interactions have probed the precise combinations of host (R) and pathogen (Avr) genes that lead to susceptibility or resistance. While laboratory trials are valuable, they cannot directly predict when and where pathogenesis will occur in natural or agricultural plant populations, as environmental factors also play a role. In this fellowship, I will build predictions of plant pathogenesis that account for spatiotemporal variation in both host and pathogen genetics over the landscape and through time.
I will investigate the model system of Hyaloperonospora arabidopsidis (Hpa; an oomycete) and Arabidopsis thaliana (Ath; a plant). Existing work in this system has identified the molecular mechanisms underlying multiple disease resistance phenotypes. I propose to extend this work by evaluating the genetic interaction of Hpa and Ath across the landscape. Specifically, I aim to
1) Determine the spatial distribution of genetic diversity across the landscape in both Ath and Hpa, investigating both neutral genome-wide patterns and R/Avr gene loci.
2) Model genetic variation in R/Avr genes across the landscape, producing maps both for today’s climate, and under predicted future climate change.
3) Predict how genetics interacts with a variable environment, including a changing climate, to produce disease, including future changes in the coevolutionary balance between plant and pathogen due to climate-induced range shifts.
These aims facilitate the projection of molecular plant-pathogen interactions onto the landscape, and provide a framework to examine the molecular mechanisms underlying ecological interaction of plants and their pathogens.
Campo scientifico
Parole chiave
Programma(i)
Argomento(i)
Meccanismo di finanziamento
MSCA-IF - Marie Skłodowska-Curie Individual Fellowships (IF)Coordinatore
80539 Munchen
Germania