CONTROL OF ARABIDOPSIS FLOWER AND SEED DEVELOPMENT BY THE HOMEOTIC GENE APETALA2
CONTROL OF ARABIDOPSIS FLOWER AND SEED DEVELOPMENT BY THE HOMEOTIC GENE APETALA2
复制标题
DOI：
10.1105/tpc.6.9.1211
复制
发表时间：
1994-09-01
期刊：
影响因子：
11.6
通讯作者：
OKAMURO, JK
中科院分区：
文献类型：
--
作者：
JOFUKU, KD;DENBOER, BGW;OKAMURO, JK
APETALAB（AP2）在拟南芥花分生组织的建立、花器官特性的特化和花同源异型基因表达的调控中起着重要作用。我们在这里表明，除了在花发育过程中的功能，AP2活性也需要在种子发育。我们分离的AP2基因，发现它编码一个假定的核蛋白，是由一个重要的68个氨基酸的重复基序，AP2结构域区分。与其遗传功能一致，我们确定AP2在RNA水平上表达于所有四种类型的花器官-萼片，花瓣，雄蕊和心皮-以及发育中的胚珠。因此，AP2基因转录似乎并不像以前的研究预测的那样受到花同源异型基因AGAMOUS的空间限制。我们还发现AP 2在花序分生组织和非花器官（包括叶和茎）的RNA水平上表达。总而言之，我们的结果表明AP 2代表一类新的植物调节蛋白，可能在控制拟南芥发育中发挥一般作用。
APETALAB (AP2) plays a central role in the establishment of the floral meristem, the specification of floral organ identity, and the regulation of floral homeotic gene expression in Arabidopsis. We show here that in addition to its functions during flower development, AP2 activity is also required during seed development. We isolated the AP2 gene and found that it encodes a putative nuclear protein that is distinguished by an essential 68-amino acid repeated motif, the AP2 domain. Consistent with its genetic functions, we determined that AP2 is expressed at the RNA level in all four types of floral organs-sepals, petals, stamens, and carpels-and in developing ovules. Thus, AP2 gene transcription does not appear to be spatially restricted by the floral homeotic gene AGAMOUS as predicted by previous studies. We also found that AP2 is expressed at the RNA level in the inflorescence meristem and in nonfloral organs, including leaf and stem. Taken together, our results suggest that AP2 represents a new class of plant regulatory proteins that may play a general role in the control of Arabidopsis development.