We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
CsAP3: A Cucumber Homolog to Arabidopsis APETALA3 with Novel Characteristics.
- Authors
Jin-Jing Sun; Feng Li; Dong-Hui Wang; Xiao-Feng Liu; Xia Li; Na Liu; Hai-Tao Gu; Cheng Zou; Jing-Chu Luo; Chao-Xing He; San-Wen Huang; Xiao-Lan Zhang; Zhi-Hong Xu; Shu-Nong Bai
- Abstract
In our previous efforts to understand the regulatory mechanisms of cucumber unisexual flower development, we observed a stamen-specific down-regulation of the ethylene receptor CsETR1 in stage 6 female flowers of cucumber (Cucumis sativus L.). This down-regulation is correlated with the primordial anther-specific DNA damage that characterizes inappropriate stamen development in cucumber female flowers. To understand how CsETR1 is down regulated in the stamen, we characterized a cucumber MADS box gene homologous to Arabidopsis AP3, CsAP3. We demonstrated that CsAP3 is functionally equivalent to the Arabidopsis B-class MADS gene AP3. However, three novel characteristics of CsAP3 were found. These include firstly, binding and activating CsETR1 promoter in vitro and in vivo; secondly, containing a GV repeat in its C-terminus, which is conserved in cucurbits and required for the transcription activation; and thirdly, decreased expression as the node number increases, which is similar to that found for CsETR1. These findings revealed not only the conserved function of CsAP3 as a B-class floral identity gene, but also its unique functions in regulation of female flower development in cucumber.
- Subjects
CUCUMBER genetics; FLOWERING of plants; ARABIDOPSIS
- Publication
Frontiers in Plant Science, 2016, p1
- ISSN
1664-462X
- Publication type
Article
- DOI
10.3389/fpls.2016.01181