ARR17 controls dioecy in Populus by repressing B-class MADS-box gene expression.

ABSTRACT: The number of dioecious species for which the genetic basis of sex determination has been resolved is rapidly increasing. Nevertheless, the molecular mechanisms downstream of the sex determinants remain largely elusive. Here, by RNA-sequencing early-flowering isogenic aspen (Populus tremula) lines differing exclusively for the sex switch gene ARR17, we show that a narrowly defined genetic network controls differential development of female and male flowers. Although ARR17 encodes a type-A response regulator supposedly involved in cytokinin (CK) hormone signalling, clustered regularly interspaced short palindromic repeats (CRISPR)-Cas9-mediated arr17 knockout only affected the expression of a strikingly small number of genes, indicating a specific role in the reg

SUBMITTER: Leite Montalvao AP 

PROVIDER: S-EPMC8935312 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature