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Model of the NB Effect on Flowering in Rice.
The NB effect on Hd3a mRNA suppression is mediated by phytochrome B, and its regulation of Hd3a mRNA is possibly at the level of transcription. The NB effect on the suppression of Hd3a transcription may be mediated by two pathways: one is Hd1-dependent, and the other is Hd1-independent. The latter is mediated by an unknown factor. Thus, the phyB-mediated NB effect interferes with two distinct transcription pathways for the Hd3a gene.
