水稻KN1型同源异型框基因家族在胚胎、茎尖和花发育过程中的区域表达。
Regional expression of the rice KN1-type homeobox gene family during embryo, shoot, and flower development.
作者信息
Sentoku N, Sato Y, Kurata N, Ito Y, Kitano H, Matsuoka M
机构信息
Nagoya University, BioScience Center, Chikusa, Nagoya 464-8601, Japan.
出版信息
Plant Cell. 1999 Sep;11(9):1651-64. doi: 10.1105/tpc.11.9.1651.
Abstract
We report the isolation, sequence, and pattern of gene expression of members of the KNOTTED1 (KN1)-type class 1 homeobox gene family from rice. Phylogenetic analysis and mapping of the rice genome revealed that all of the rice homeobox genes that we have isolated have one or two direct homologs in maize. Of the homeobox genes that we tested, all exhibited expression in a restricted region of the embryo that defines the position at which the shoot apical meristem (SAM) would eventually develop, prior to visible organ formation. Several distinct spatial and temporal expression patterns were observed for the different genes in this region. After shoot formation, the expression patterns of these homeobox genes were variable in the region of the SAM. These results suggest that the rice KN1-type class 1 homeobox genes function cooperatively to establish the SAM before shoot formation and that after shoot formation, their functions differ.
摘要
我们报道了从水稻中分离出的KNOTTED1（KN1）型1类同源异型盒基因家族成员的基因、序列及其基因表达模式。系统发育分析和水稻基因组图谱显示，我们分离出的所有水稻同源异型盒基因在玉米中都有一个或两个直系同源基因。在我们测试的同源异型盒基因中，所有基因在胚胎的一个特定区域均有表达，该区域在可见器官形成之前就确定了茎尖分生组织（SAM）最终发育的位置。在该区域，不同基因呈现出几种不同的时空表达模式。在茎形成后，这些同源异型盒基因在SAM区域的表达模式各不相同。这些结果表明，水稻KN1型1类同源异型盒基因在茎形成之前协同作用以建立SAM，而在茎形成之后，它们的功能有所不同。
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