RABBIT EARS, encoding a SUPERMAN-like zinc finger protein, regulates petal development in Arabidopsis thaliana
RABBIT EARS, encoding a SUPERMAN-like zinc finger protein, regulates petal development in Arabidopsis thaliana
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DOI：
10.1242/dev.00938
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发表时间：
2004-01-01
期刊：
影响因子：
4.6
通讯作者：
Okada, K
中科院分区：
文献类型：
--
作者：
Takeda, S;Matsumoto, N;Okada, K
花器官通常在花内同心轮生的固定位置发生。虽然花的同源异型基因决定花器官的身份，但其位置决定和各器官发育的机制尚未得到明确解释。我们分离出一种新的突变体，兔耳（rbe），花瓣发育缺陷。在rbe中，发育不全的花瓣在花中的正确位置形成，并且花瓣原基的起始被改变。rbe突变影响第二轮器官的形状，与器官的特性无关。RBE编码SUPERMAN样蛋白，位于细胞核中，因此可能是一种转录因子。RBE转录本在花瓣原基及其前体细胞中表达，并在后期消失。当表达RBE的细胞被基因切除时，没有花瓣原基产生。RBE在ap 1 -1和ptl-1突变体中不表达，表明RBE作用于AP 1和PTL基因下游。这些特征表明，RBE是第二轮器官原基的早期发育所必需的。
Floral organs usually initiate at fixed positions in concentric whorls within a flower. Although it is understood that floral homeotic genes determine the identity of floral organs, the mechanisms of position determination and the development of each organ have not been clearly explained. We isolated a novel mutant, rabbit ears (rbe), with defects in petal development. In rbe, underdeveloped petals are formed at the correct position in a flower, and the initiation of petal primordia is altered. The rbe mutation affects the second whorl organ shapes independently of the organ identity. RBE encodes a SUPERMAN-like protein and is located in the nucleus, and thus may be a transcription factor. RBE transcripts are expressed in petal primordia and their precursor cells, and disappeared at later stages. When cells that express RBE are ablated genetically, no petal primordia arise. RBE is not expressed in ap1-1 and ptl-1 mutants, indicating that RBE acts downstream of AP1 and PTL genes. These characteristics suggest that RBE is required for the early development of the organ primordia of the second whorl.