Epigenomic and transcriptomic persistence of heat stress memory in strawberry (Fragaria vesca)
Langue
en
Article de revue
Ce document a été publié dans
BMC Plant Biology. 2024-05-16, vol. 24, n° 1, p. 405
BioMed Central
Résumé en anglais
Abstract Background In plants, epigenetic stress memory has so far been found to be largely transient. Here, we wanted to assess the heritability of heat stress-induced epigenetic and transcriptomic changes following ...Lire la suite >
Abstract Background In plants, epigenetic stress memory has so far been found to be largely transient. Here, we wanted to assess the heritability of heat stress-induced epigenetic and transcriptomic changes following woodland strawberry ( Fragaria vesca ) reproduction. Strawberry is an ideal model to study epigenetic inheritance because it presents two modes of reproduction: sexual (self-pollinated plants) and asexual (clonally propagated plants named daughter plants). Taking advantage of this model, we investigated whether heat stress-induced DNA methylation changes can be transmitted via asexual reproduction. Results Our genome-wide study provides evidence for stress memory acquisition and maintenance in F. vesca . We found that specific DNA methylation marks or epimutations are stably transmitted over at least three asexual generations. Some of the epimutations were associated with transcriptional changes after heat stress. Conclusion Our findings show that the strawberry methylome and transcriptome respond with a high level of flexibility to heat stress. Notably, independent plants acquired the same epimutations and those were inherited by their asexual progenies. Overall, the asexual progenies can retain some information in the genome of past stresses encountered by their progenitors. This molecular memory, also documented at the transcriptional level, might be involved in functional plasticity and stress adaptation. Finally, these findings may contribute to novel breeding approaches for climate-ready plants.< Réduire
Mots clés en anglais
Fragaria
Epigenetic
Memory
Stress
Asexual
Reproduction
Fragaria vesca
Projet Européen
Marie Skłodowska-Curie grant agreement No 764965
Directed crop breeding using jumping genes
Directed crop breeding using jumping genes
Origine
Importé de halUnités de recherche