同源异型基因
恶毒的
生物
拟南芥
分生组织
MADS箱
同源盒
花瓣
胚珠
雌蕊
遗传学
基因
突变体
雄蕊
萼片
转录因子
细胞生物学
植物
胚胎
花粉
作者
K. Diane Jofuku,B G den Boer,Marc Van Montagu,Jack K. Okamuro
出处
期刊:The Plant Cell
[Oxford University Press]
日期:1994-09-01
卷期号:6 (9): 1211-1225
被引量:990
摘要
APETALA2 (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.
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