氟污染与套袋对芒果果实某些生理过程的影响

Some Effects of Fluoride Pollution and Fruit Bagging on Fruit Developmental Physiology in Mango ( Mangifera indica L.)

受氟污染紫花芒果皮膜脂过氧化产物丙二醛持续上升 ,在果实发育初期SOD、CAT、POX活性上升 ,在谢花后33d出现活性高峰 ,以后迅速下降 ,芒果组织及器官出现黑顶 套袋具有机械防氟作用 ,套袋早 ,酶活性可恢复到正常水平 ,芒果果实发育正常 ;套袋迟 ,酶活性受到干扰 ,果实出现黑顶症状 在氟污染逆境下 ,芒果果实在谢花后40d开始产生伤害乙烯 ,黑顶症状大量出现 ,谢花后 33d前果实套袋可有效降低伤害乙烯的生成 。

Contents of MDA in mango peel went up continuously under fluoride pollution, and it's SOD, CAT, POX enzyme activities increased in initiative developmental stage and reached a climax in 33 days after flower shedding and descended rapidly later. As a result, black tip symptoms were appeared. Fruit bagging was a physical measure to isolate fluoride pollution and early bagging pulled the enzyme activities back to normal level so mango fruit could developed normally; However, fruit bagged in late period, enzyme activities were disordered and black tip symptoms appeared. Harmful ethylene in mango fruit was excreted in 33 days after flower shedding and fruit black tip symptoms appeared heavy when fruit exposed under fluoride pollution. Black tip symptoms can be reduced effectively by decreasing the contents of harmful ethylene via fruit bagging before 33 days after flower shedding.