Translocation of 14C-Iabelled assimilate within the plant ceased when the plant was held at 2-3°C. Chilling a short length of petiole to 1°C prevented trans· location of labelled assimilate past the chilled section of petiole. When the petiole was again warmed, translocation through it was resumed. The time between warm-ing the petiole and the resumption of translocation varied between 5 and 20 min.
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StellAL Thrower (1965) studied this question.
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