The Arabidopsis AGL9 MADS box gene is expressed in young flower primordia
The Arabidopsis AGL9 MADS box gene is expressed in young flower primordia
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DOI：
10.1007/s004970050116
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发表时间：
1998-02-01
影响因子：
--
通讯作者：
Yanofsky, MF
中科院分区：
文献类型：
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作者：
Mandel, MA;Yanofsky, MF
MADS盒子基因可能参与了植物发育的许多不同步骤，因为它们的rna在各种组织中积累，包括根、茎、叶、花和胚胎。在花中，MADS盒子基因调控着确定花分生组织身份的早期步骤，以及决定花器官原基命运的后期步骤。本文从拟南芥中分离并鉴定了一个新的MADS盒子基因AGL9。序列分析表明，AGL9分别代表牵牛花FBP2和番茄TM5基因的同源基因。原位杂交分析表明，AGL9 RNA在花分生组织特征基因表达开始后，但在器官特征基因激活之前开始积累。这些数据表明，AGL9在花发育早期起着调节这两类基因相互作用的作用。在花发育后期，AGL9 RNA在花瓣、雄蕊和心皮中积累，表明AGL9在控制这些器官的发育中起作用。
MADS box genes are likely involved in many different steps of plant development, since their RNAs accumulate in a wide variety of tissues, including roots, stems, leaves, flowers and embryos. In flowers, MADS box genes regulate the early step of specifying floral meristem identity as well as the later step of determining the fate of floral organ primordia. Here we describe the isolation and characterization of a new MADS box gene from Arabidopsis, AGL9. Sequence analyses indicate that AGL9 represents the putative ortholog of the FBP2 and TM5 genes from petunia and tomato, respectively. In situ hybridization analyses show that AGL9 RNA begins to accumulate after the onset of expression of the floral meristem identity genes, but before the activation of the organ identity genes. These data indicate that AGL9 functions early in flower development to mediate between the interaction of these two classes of genes. Later in flower development, AGL9 RNA accumulates in petals, stamens, and carpels, suggesting a role for AGL9 in controlling the development of these organs.