Rice ABERRANT PANICLE ORGANIZATION 1, encoding an F-box protein, regulates meristem fate
Rice ABERRANT PANICLE ORGANIZATION 1, encoding an F-box protein, regulates meristem fate
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DOI：
10.1111/j.1365-313x.2007.03200.x
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发表时间：
2007-09-01
期刊：
影响因子：
7.2
通讯作者：
Nagato, Yasuo
中科院分区：
文献类型：
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作者：
Ikeda, Kyoko;Ito, Momoyo;Nagato, Yasuo
花序构型是重要的农艺性状之一。水稻异常穗组织1（apo 1）突变体的特性表明，APO 1正控制小穗数通过抑制花序分生组织的早熟转换小穗分生组织。此外，APO 1与调控质体时，花器官的身份，和花的决定性。apo 1和花同源异型双突变体的表型分析表明，APO 1正调控C类花同源异型基因，但不是B类基因。分子生物学研究表明，APO 1编码一个F-box蛋白，是拟南芥不寻常花器官（UFO）的直系同源物，是B类基因的正调控因子。过量表达APO 1导致花序分枝和小穗的增加。由于apo 1和ufo之间的突变花序和花有很大的不同，因此apo 1和UFO的功能似乎在进化过程中有所不同。
Inflorescence architecture is one of the most important agronomical traits. Characterization of rice aberrant panicle organization 1 (apo1) mutants revealed that APO1 positively controls spikelet number by suppressing the precocious conversion of inflorescence meristems to spikelet meristems. In addition, APO1 is associated with the regulation of the plastchron, floral organ identity, and floral determinacy. Phenotypic analyses of apo1 and floral homeotic double mutants demonstrate that APO1 positively regulates class-C floral homeotic genes, but not class-B genes. Molecular studies revealed that APO1 encodes an F-box protein, an ortholog of Arabidopsis UNUSUAL FLORAL ORGAN (UFO), which is a positive regulator of class-B genes. Overexpression of APO1 caused an increase in inflorescence branches and spikelets. As the mutant inflorescences and flowers differed considerably between apo1 and ufo, the functions of APO1 and UFO appear to have diverged during evolution.