3.5. Distribution of carbon derived from applied glucose or mannitol
To clarify the distribution of carbon derived from applied glucose or mannitol, we performed a tracer experiment using 14C-glucose and 14C-mannitol. Accumulation of 14C in flowers at both parts was greater in the glucose treatment than in the mannitoltreatment (Fig. 5), although accumulation of 14C in the tip was greater in the mannitol treatment than in the glucose treatment, suggesting that distribution of carbon differed depending on the applied carbohydrate.