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. 2015 Jan 28;5:803. doi: 10.3389/fpls.2014.00803

FIGURE 1.

FIGURE 1

Regulatory networks of genetic and epigenetic control of rice flowering under short-day (A) and long-day (B) photoperiod conditions. Rice flowering network is integrated by two florigen genes Hd3a and RFT1, which are regulated by at least two pathways: the Hd1-dependent and the Ehd1-dependent pathways. Expressions of Hd1 and Ehd1 are further regulated by more upstream genes as indicated by different names in the circles. Arrows indicate for transcriptional activation, whereas bars indicate for transcriptional repression. Different color spheres surrounding the flowering gene circles indicate for different regulations by the indicated histone modifications at the gene locus, currently described in literatures.