Selected topics on seed dormancy and the control of seed germination
Séminaire de Luis Lopez Molina
University of Geneva, Department of Plant Biology and Institute for Genetics and Genomics in Geneva (iGE3)
- Date : vendredi 3 mai 2024
- Horaire : 11h00
- Lieu : Salle de conférence de l'IBVM, campus INRAE de Villenave d'Ornon
Seeds are remarkable structures keeping the plant embryo in a highly resistant state to favor plant dispersion and colonization of new habitats. Furthermore, seeds exhibit primary dormancy, a trait whereby germination is temporarily repressed to promote germination during a favorable season for seedling formation and reproductive success. The duration needed to lose seed dormancy determines dormancy levels.
The underlying mechanisms sustaining dormancy release remain poorly understood. I will present an overview of the main elements sustaining seed dormancy in Arabidopsis thaliana and describe our current research towards identifying the molecular mechanisms underlying the trait of seed dormancy.
Bibliographie
- The Arabidopsis endosperm is a temperature-sensing tissue that implements seed thermoinhibition through phyB. Piskurewicz U, Sentandreu M, Iwasaki M, Glauser G, Lopez-Molina L.Nat Commun. 2023 Mar 7;14(1):1202. doi: 10.1038/s41467-023-36903-4.
- Parental and Environmental Control of Seed Dormancy in Arabidopsis thaliana. Iwasaki M, Penfield S, Lopez-Molina L.Annu Rev Plant Biol. 2022 May 20;73:355-378. doi: 10.1146/annurev-arplant-102820-090750. Epub 2022 Feb 9.
- The Arabidopsis mature endosperm promotes seedling cuticle formation via release of sulfated peptides. De Giorgi J, Fuchs C, Iwasaki M, Kim W, Piskurewicz U, Gully K, Utz-Pugin A, Mène-Saffrané L, Waridel P, Nawrath C, Longoni FP, Fujita S, Loubéry S, Lopez-Molina L.Dev Cell. 2021 Nov. 22;56(22):3066-3081.e5. Link.
- Polyamine uptake transporter 2 (put2) and decaying seeds enhance phyA-mediated germination by overcoming PIF1 repression of germination. Kim W, Zeljković SĆ, Piskurewicz U, Megies C, Tarkowski P, Lopez-Molina L.PLoS Genet. 2019 Jul 24;15(7):e1008292. Link