Water import in the young tomato fruit limited by pedicel resistance and calyx transpiration.

摘要: Approximately 3 weeks after pollination, the water import rate per unit tomato fruit area generally decreases linearly with radius. In order to explain why, in first weeks, of is lower than predicted by this regression, a model flow through pedicel and based on potential entering calyx transpiration were formulated. Using data sets available literature, these models predict drop along that sharply during while calculated hydraulic conductivity phloem, which presumed be main pathway imported fruit, increases range values known for plant phloem conductivity. These also an increase into young when decreased, consistent from literature. increasing conductivity, sieve tubes was formulated literature stalk Lupinus albus. It suggested might because development pores plates. hypothesis, pore radius within acceptable calculated. This study shows that, under wide conditions, limited low due resistance transpiration. provides expansion testable can checked measuring size component pedicel.