An miR164-resistant mutation in the transcription factor gene CpCUC2B enhances carpel arrest and ectopic boundary specification in Cucurbita pepo flower development.

ABSTRACT: The sex determination process in cucurbits involves the control of stamen or carpel development during the specification of male or female flowers from a bisexual floral meristem, a function coordinated by ethylene. A gain-of-function mutation in the miR164-binding site of CpCUC2B, ortholog of the Arabidopsis transcription factor gene CUC2, not only produced ectopic floral meristems and organs, but also suppressed the development of carpels and promoted the development of stamens. The cuc2b mutation induced the transcription of CpCUC2B in the apical shoots of plants after female flowering but repressed other CUC genes regulated by miR164, suggesting a conserved functional redundancy of these genes in the development of squash flowers. The synergistic androecious phenotype of the double mut

SUBMITTER: Segura M 

PROVIDER: S-EPMC10967242 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature