Colasanti J, Yuan Z, Sundaresan V
University of California, Berkeley, Plant Gene Expression Center, Albany 94710, USA.
Cell. 1998 May 15;93(4):593-603. doi: 10.1016/s0092-8674(00)81188-5.
Flowering in plants is a consequence of the transition of the shoot apex from vegetative to reproductive growth in response to environmental and internal signals. The indeterminate1 gene (id1) controls the transition to flowering in maize. We show by cloning the id1 gene that it encodes a protein with zinc finger motifs, suggesting that the id1 gene product functions as a transcriptional regulator of the floral transition. id1 mRNA expression studies and analyses of transposon-induced chimeric plants indicate that id1 acts non-cell-autonomously to regulate the production of a transmissible signal in the leaf that elicits the transformation of the shoot apex to reproductive development. These results provide molecular and genetic data consistent with the florigen hypothesis derived from classical plant physiology studies.
植物开花是茎尖响应环境和内部信号从营养生长向生殖生长转变的结果。玉米中的 indeterminate1 基因（id1）控制着向开花的转变。我们通过克隆 id1 基因表明，它编码一种具有锌指基序的蛋白质，这表明 id1 基因产物作为花转变的转录调节因子发挥作用。id1 mRNA 表达研究和转座子诱导的嵌合体植物分析表明，id1 非细胞自主地发挥作用，以调节叶片中一种可传递信号的产生，该信号引发茎尖向生殖发育的转变。这些结果提供了与源自经典植物生理学研究的成花素假说相一致的分子和遗传数据。
