Sorbitol mediates age-dependent changes in apple plant growth strategy through gibberellin signaling.

ABSTRACT: Plants experience various age-dependent changes during juvenile to adult vegetative phase. However, the regulatory mechanisms orchestrating the changes remain largely unknown in apple (Malus domestica). This study showed that tissue-cultured apple plants at juvenile, transition, and adult phase exhibit age-dependent changes in their plant growth, photosynthetic performance, hormone levels, and carbon distribution. Moreover, this study identified an age-dependent gene, sorbitol dehydrogenase (MdSDH1), a key enzyme for sorbitol catabolism, highly expressed in the juvenile phase in apple. Silencing MdSDH1 in apple significantly decreased the plant growth and GA3 levels. However, exogenous GA3 rescued the reduced plant growth phenotype of TRV-MdSDH1. Biochemical ana

SUBMITTER: Jia X 

PROVIDER: S-EPMC11322524 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature