Flowering time regulation produces much fruit.

Flowering time regulation produces much fruit.
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DOI:
10.1016/j.pbi.2008.09.005
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发表时间:
2009-02
影响因子:
9.5
通讯作者:
Michaels, Scott D.
Michaels, Scott D.
中科院分区:
生物学2区
文献类型:
--
作者:
Michaels, Scott D.

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许多关于促进开花的分子细节,在响应于长时间暴露于低温(春化)和日照长度最近已在拟南芥中阐明。日照长度和春化途径在被称为成花整合子的成花启动子的调节中会聚。在分生组织中,春化作用通过花抑制子FLOWERING LOCUS C的表观遗传抑制来促进开花。这允许在诱导性长日照下通过CONSTANS诱导花整合子。在叶的脉管系统中,CONSTANS蛋白仅在长日照时产生,在长日照时,CONSTANS蛋白起作用以促进FLOWLEDLOCUS T(FT)的表达。FT蛋白随后转移到分生组织,在那里它起到促进成花诱导的作用。因此,一个详细的分子框架调控开花时间现已在拟南芥中建立。
Many of the molecular details regarding the promotion of flowering in response to prolonged exposure to cold temperatures (vernalization) and daylength have recently been elucidated in Arabidopsis. The daylength and vernalization pathway converge in the regulation of floral promoters referred to as floral integrators. In the meristem, vernalization promotes flowering through the epigenetic repression of the floral repressor FLOWERING LOCUS C. This allows for the induction of floral integrators by CONSTANS under inductive long days. In the vasculature of leaves, CONSTANS protein is produced only in long days where it acts to promote the expression of FLOWERING LOCUS T (FT). FT protein is then translocated to the meristem where it acts to promote floral induction. Thus a detailed molecular framework for the regulation of flowering time has now been established in Arabidopsis.
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