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Elongation of bud n-2 under a low R:FR and at various times after decapitating the main stem and/or increasing the R:FR. Top panel shows full data set, inset magnifies the first 24 h, lower panel magnifies time points from 3 to 48 h. Data are means ± SE with n = 13. Values within time points with different letters are significantly different at α = 0.05. This figure is available in colour at JXB online.
