Conservation of B-class floral homeotic gene function between maize and Arabidopsis

被引:162
作者
Whipple, CJ [1 ]
Ciceri, P [1 ]
Padilla, CM [1 ]
Ambrose, BA [1 ]
Bandong, SL [1 ]
Schmidt, RJ [1 ]
机构
[1] Univ Calif San Diego, Div Biol Sci, Sect Cell & Dev Biol, La Jolla, CA 92093 USA
来源
DEVELOPMENT | 2004年 / 131卷 / 24期
关键词
Silky1; Zmm16; B-class; maize; MADS-box; petal evolution;
D O I
10.1242/dev.01523
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
The ABC model of flower development, established through studies in eudicot model species, proposes that petal and stamen identity are under the control of B-class genes. Analysis of B- and C-class genes in the grass species rice and maize suggests that the C- and B-class functions are conserved between monocots and eudicots, with B-class genes controlling stamen and lodicule development. We have undertaken a further analysis of the maize B-class genes Silky1, the putative AP3 ortholog, and Zmm16, a putative PI ortholog, in order to compare their function with the Arabidopsis B-class genes. Our results show that maize B-class proteins interact in vitro to bind DNA as an obligate heterodimer, as do Arabidopsis B-class proteins. The maize proteins also interact with the appropriate Arabidopsis B-class partner proteins to bind DNA. Furthermore, we show that maize B-class genes are capable of rescuing the corresponding Arabidopsis B-class mutant phenotypes. This demonstrates B-class activity of the maize gene Zmm16, and provides compelling evidence that B-class gene function is conserved between monocots and eudicots.
引用
收藏
页码:6083 / 6091
页数:9
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