Paralogous SQUAMOSA PROMOTER BINDING PROTEIN-LIKE (SPL) genes differentially regulate leaf initiation and reproductive phase change in petunia

• DOI: 10.1007/s00425-015-2413-2
• Publication Date: 2015-10-07T03:50:13Z
• Authors: Jill C. Preston; Stacy A. Jorgensen; Rebecca Orozco; Lena C. Hileman
• Keywords: Petunia; MADS-box

Duplicated petunia clade-VI SPL genes differentially promote the timing of inflorescence and flower development, leaf initiation rate. The plant reproduction relative to favorable environmental conditions is a critical component fitness, often associated with variation in architecture habit. Recent studies have shown that overexpression microRNA miR156 distantly related annual species results plants perennial characteristics, including late flowering, weak apical dominance, abundant production. These phenotypes are largely mediated through negative regulation subset belonging SQUAMOSA PROMOTER BINDING PROTEIN-LIKE (SPL) family transcription factors. In order determine how what extent paralogous partitioned their roles growth we functionally characterized under different conditions. Our demonstrate PhSBP1and PhSBP2 discrete stages reproductive transition, PhSBP1, possibly PhCNR, accelerates contrast closest homologs Arabidopsis thaliana Mimulus guttatus, PhSBP1 not by gibberellic acid pathway, but positively correlated photoperiod developmental age. functions have, thus, evolved following both gene duplication speciation within core eudicots, likely differential incomplete sub-functionalization.