Auxin regulates anthocyanin biosynthesis through the Aux/IAA-ARF signaling pathway in apple.

ABSTRACT: Auxin signaling, which is crucial for normal plant growth and development, mainly depends on ARF-Aux/IAA interactions. However, little is known regarding the regulatory effects of auxin signaling on anthocyanin metabolism in apple (Malus domestica). We investigated the functions of MdARF13, which contains a repression domain and is localized to the nucleus. This protein was observed to interact with the Aux/IAA repressor, MdIAA121, through its C-terminal dimerization domain. Protein degradation experiments proved that MdIAA121 is an unstable protein that is degraded by the 26S proteasome. Additionally, MdIAA121 stability is affected by the application of exogenous auxin. Furthermore, the overexpression of MdIAA121 and MdARF13 in transgenic red-fleshed apple calli weake

SUBMITTER: Wang YC 

PROVIDER: S-EPMC6269505 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature