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Seedlings of Rp1-D21-H95 (top) and Tx303 × Rp1-D21-H95 (bottom) were grown in 34/30°C, with 12 h light/12 h dark for 10 days. The middle section of the 4th leaves were wrapped in aluminum foil and the temperature was changed to 22/18°C. (A) Foil was removed after a further 4 days at the lower temperature. (B) Two days after removal of foil still at the lower temperature. Lines drawn on the leaf indicate where the aluminum foil was placed.
