Physiological Basis Of Sugar Accumulation

Sugar Transport Plants

The ripening grape berry is a strong sink for dry matter transported from current photosynthesis and wood reserves Coombe 1989 . Sucrose derived from leaf photosynthesis is exported via the phloem to the berries. From verai-son and throughout ripening the berries accumulate roughly equal amounts of glucose and fructose, reaching over 1M of each hexose Coombe 1987 . This implies that phloem transported sucrose is hydrolyzed at some step during its transport from the sieve tube to the vacuole of...