The rosette habit of Arabidopsis thaliana is dependent upon phytochrome action: novel phytochromes control internode elongation and flowering time.


A major function of phytochromes in light-grown plants involves the perception of changes in the relative amounts of red and far-red light (R:FR ratio) and the initiation of the shade-avoidance response. In Arabidopsis thaliana, this response is typified by increased elongation growth of petioles and accelerated flowering and can be fully induced by end-of… (More)


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