拟南芥开花时间的分子遗传调控

拟南芥开花主要受四种遗传途径调控,即:光周期途径,春化途径,自主途径和赤霉素途径。各种途径之间通过CO,FLC,FT,SOC1等主效基因的相互作用,最终调节花特异性基因AP1和LFY的表达,从而调控拟南芥的开花时间,其中各种突变体的研究揭示了相关基因的功能。这些主效基因中,CO基因对光周期途径是特异的,FLC基因对开花起抑制作用。其它因素如环境、基因染色质结构的改变、酶等对拟南芥开花时间的影响有待进一步的研究。

Genetic Control of Flowering Time in Arabidopsis thaliana

The flowering time of Arabidopsis are controlled by four major promotion pathways: long-day photoperiod,(autonomous,) vernalization and gibberellin(GA).The four pathways interact with each other by the main genes,CO,FLC,FT,SOC1,etc,then promote the expression of the floral meristem identity genes AP1 and LFY which enable the floral transition.Genetic analysis of a large number of Arabidopsis flowering time mutants has made the function of the(related) genes clear.In the main flowering time genes, CO is special to photoperiod,and FLC is a floral repressor.There are still many unanswered questions that influence the flowering time of Arabidopsis to be studied.