期刊
DEVELOPMENT
卷 133, 期 9, 页码 1673-1682出版社
COMPANY BIOLOGISTS LTD
DOI: 10.1242/dev.02331
关键词
meristem identity switch; LEAFY; CAULIFLOWER; feed-forward loop; transcription; development; Arabidopsis
The timing of the switch from vegetative to reproductive development is crucial for species survival. The plant-specific transcription factor and meristem identity regulator LEAFY (LFY) controls this switch in Arabidopsis, in part via the direct activation of two other meristem identity genes, APETALA1 (AP1) and CAULIFLOWER (CAL). We recently identified five new direct LFY targets as candidates for the missing meristem identity regulators that act downstream of LFY. Here, we demonstrate that one of these, the class I homeodomain leucine-zipper transcription factor LMI1, is a meristem identity regulator. LMI1 acts together with LFY to activate CAL expression. The interaction between LFY, LMI1 and CAL resembles a feed-forward loop transcriptional network motif. LMI1 has additional LFY-independent roles in the formation of simple serrated leaves and in the suppression of bract formation. The temporal and spatial expression of LMI1 supports a role in meristem identity and leaf/bract morphogenesis.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据