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Open canopy R:FR>1. Shade R:FR<1. Shade avoidance pathway. ?. low R:FR. Cytokinin Oxidase AtCKX6. Auxin (TAA1). cytokinin. Leaf growth inhibition. Auxin transport PIN3. Stem growth inhibition. ?. gibberellin. High R:FR. degradation. Auxin induced genes. low R:FR .
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Open canopy R:FR>1 Shade R:FR<1 Shade avoidance pathway ? low R:FR Cytokinin Oxidase AtCKX6 Auxin(TAA1) cytokinin Leaf growth inhibition Auxin transport PIN3 Stem growth inhibition ? gibberellin High R:FR degradation Auxin induced genes low R:FR Stem growth promotion phy(Pfr) phy(Pr) DELLA PIF-induced genes DELLA PIFs HFR1 PIFs Credit : Yvon Jaillais 26S proteasome-regulated degradation