Overexpression of an auxin receptor OsAFB6 significantly enhanced grain yield by increasing cytokinin and decreasing auxin concentrations in rice panicle.

ABSTRACT: Auxin plays critical roles in many developmental processes of plants. The auxin signaling pathway is a series of plant responses to auxin stimuli. However, the functions of many genes in this pathway are still obscure. As auxin receptors, TIR/AFB family genes encode F-Box proteins that directly bind auxin and then transduce the stimulus through the signaling pathway. In this paper, we generated an overexpression line of Auxin-signaling F-Box 6 (OsAFB6) in rice, which largely delayed heading, greatly increased spikelets per panicle and primary branch number and ultimately enhanced grain yield by 50%. OsAFB6 is preferentially expressed in young tissues with stronger meristem activities and suppresses flowering by upregulating OsRR1 and downregulating Ehd1 expression levels. Overexpression of

SUBMITTER: He Q 

PROVIDER: S-EPMC6145926 | biostudies-literature | 2018 Sep

REPOSITORIES: biostudies-literature