The first
and second peaks occurred earlier at 30/25 8C (Fig. 1B), i.e., 2–4
DAP and 12–14 DAP. In ‘Toyonoka’, the first and second peaks
occurred, respectively, at 4–6 DAP and 16–20 DAP at 23/18 8C
(Fig. 1C) and at 2–4 DAP and 12–16 DAP at 30/25 8C (Fig. 1D).
For both cultivars and at both temperature treatments, the first
RGR peak was much higher than the second peak.