FR day extension sustained growth and B treatment induced bud set in Norway spruce.
In comparison, R delayed/reduced bud set, particularly in southern provenance.
FTL2 expression preceding bud set correlated with bud set timing in these treatments.
COL1, COL2, SOC1 expression decreased rapidly in bud-inducing light qualities.
Expression of CRY and PHY light receptor genes increased after bud set.