Ca^(2+)对离体培养的番茄花柄脱落的影响以及脱落过程中离区内钙形态的变化

Effect of Ca^(2+) on Abscission of Tomato (Lycopersicon esculentum Mill) Pedicle in vitro and Change of Calcium Form in Abscission Zone during Process of Abscission

在自然条件下,Ca^(2+)对离体培养的番茄花柄脱落有抑制作用,而对经乙烯处理的则有显著的促进。无论是在自然还是乙烯条件下,未经任何处理的番茄花柄脱落过程中总钙与果胶酸钙含量下降,而水溶性钙含量升高,Ca^(2+)在不同程度上提高脱落过程中离区总钙、果胶酸钙和水溶性钙含量,尤其是在乙烯下的效果更显著,而经EGTA处理的则相反。

Ca^2＋ suppressed abscission of tomato （Lycopersicon esculentum） pedicle in vitro under natural condition, on the contrary, it accelerated the process under ethylene condition. Under both conditions, total calcium and Ca-pectate contents increased and soluble Ca content decreased in abscission zone without Ca^2＋ treatment. Ca^2＋ increased total calcium, Ca-pectate and soluble Ca contents in varying degrees, especially under ethylene condition. However, the effect of EGTA was opposite to Ca^2＋ under both conditions.