The SlHB8 Acts as a Negative Regulator in Stem Development and Lignin Biosynthesis.

ABSTRACT: The stem is an important organ in supporting plant body, transporting nutrients and communicating signals for plant growing. However, studies on the regulation of stem development in tomato are rather limited. In our study, we demonstrated that SlHB8 negatively regulated tomato stem development. SlHB8 belongs to homeo domain-leucine zipper Class III gene family transcription factors and expressed in all the organs examined including root, stem, leaves, flower, and fruit. Among these tissues, SlHB8 showed stable high expression level during tomato stem development. Overexpression of SlHB8 gene decreased stem diameter with inhibited xylem width and xylem cell layers, while loss of function of SlHB8gene increased the stem diameter and xylem width. The contents of lignin were decreased both in

SUBMITTER: Liu X 

PROVIDER: S-EPMC8708474 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature