Fumarylacetoacetate Hydrolase Regulates Seed Dormancy and Germination Through the Gibberellin Pathway in Arabidopsis.

ABSTRACT: Tyrosine (Tyr) degradation is a crucial pathway in animals. However, its role in plants remains to be examined. Fumarylacetoacetate hydrolase (FAH) is the final enzyme involved in Tyr degradation. Studies of a mutant of the SHORT-DAY SENSITIVE CELL DEATH 1 (SSCD1) gene encoding FAH in Arabidopsis have shown that blockage of this pathway results in the accumulation of Tyr metabolites, thereby inducing cell death under short-day conditions. Seed dormancy is a critical trait which is regulated by endogenous and environmental cues, among which abscisic acid (ABA) and gibberellin (GA) are the primary effectors. ABA induces seed dormancy, whereas GA releases seed dormancy. In this study, sscd1 seeds displayed deep dormancy and hypersensitivity to the GA biosynthesis inhibito

SUBMITTER: Hu C 

PROVIDER: S-EPMC12608377 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature