玉米粗盖2基因和叶子开发计划在单角和双角植物中
M Tsiantis1, R Schneeberger, J F Golz
1Department of Plant Sciences, University of Oxford, South Parks Road, Oxford OX1 3BR, UK.
Science (New York, N.Y.)
|April 2, 1999
概括
玉米粗盖2 (rs2) 和Antirrhinum PHANTASTICA (PHAN) 基因通过防止结结1-like homeobox基因积累来调节叶子的发育. rs2和phan突变的差异显示出不同的单和双叶的发育计划.
科学领域:
- 植物发育生物学植物发育生物学
- 分子遗传学 分子遗传学
- 植物的进化 植物的进化
背景情况:
- 叶子的发育源于较高的植物中射出角的美里系统.
- 玉米粗皮2 (rs2) 中的突变破坏了叶子的发育,原因是结结1-like (knox) homeobox基因的异常表达.
研究的目的:
- 研究玉米rs2基因在叶子发育中的功能.
- 为了比较RS2和PHAN在单和双叶的发育中的作用.
- 了解单植物和双植物之间叶子发育差异的遗传基础.
主要方法:
- 玉米rs2基因的序列分析.
- 对 rs2 和 Antirrhinum PHANTASTICA (PHAN) 的基因序列进行比较.
- 对rs2和phan突变植物的表型分析.
主要成果:
- rs2基因序列与Antirrhinum PHAN基因相似,两者都编码类似Myb的转录因子.
- 玉米中的RS2和Antirrhinum中的PHAN对于防止Knox基因产品在叶子发育中的异胎积累至关重要.
- 在rs2和phan中观察到明显的突变表型,表明了特定物种的角色.
结论:
- RS2和PHAN在不同植物系的叶子发育调节中发挥着保留但不同的作用.
- 这项研究突出了单叶植物和双叶植物之间对叶子发育的遗传控制的根本差异.
- 了解这些差异可以了解植物结构的演变.
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