Coen E S, Romero J M, Doyle S, Elliott R, Murphy G, Carpenter R
John Innes Institute, John Innes Centre for Plant Science Research, Norwich, England.
Cell. 1990 Dec 21;63(6):1311-22. doi: 10.1016/0092-8674(90)90426-f.
Plants carrying the floricaula (flo) mutation cannot make the transition from inflorescence to floral meristems and have indeterminate shoots in place of flowers. The flo-613 allele carries a Tam3 transposon insertion, which allowed the isolation of the flo locus. The flo gene encodes a putative protein (FLO) containing a proline-rich N-terminus and a highly acidic region. In situ hybridization shows that the flo gene is transiently expressed in the very early stages of flower development. The earliest expression seen is in bract primordia, followed by sepal, petal, and carpel primordia, but no expression is detected in stamen primordia. This pattern of expression has implications for how flo affects phyllotaxis, organ identity, and determinacy. We propose that flo interacts in a sequential manner with other homeotic genes affecting floral organ identity.
携带花椰菜花（flo）突变的植物无法从花序分生组织过渡到花分生组织，并且在花的位置上有无限生长的茎。flo-613等位基因携带一个Tam3转座子插入，这使得flo基因座得以分离。flo基因编码一种推定的蛋白质（FLO），该蛋白质含有富含脯氨酸的N端和一个高度酸性区域。原位杂交表明，flo基因在花发育的非常早期阶段短暂表达。最早观察到的表达出现在苞片原基，随后是萼片、花瓣和心皮原基，但在雄蕊原基中未检测到表达。这种表达模式对flo如何影响叶序、器官特性和确定性具有重要意义。我们提出，flo以顺序方式与其他影响花器官特性的同源异型基因相互作用。
