【摘要】 本实验测定了杏果成熟期间生长调节物质含量的变化以及施用脱落酸对杏果成熟作用的影响。结果表明,在杏果生长的早期,生长促进物质的水平很高,在果实第Ⅱ期末生长结束之前,开始大幅度降低,第Ⅱ期继续下降直至果实完熟,此时生长促进物质几乎完全消失。与此同时,生长抑制物质(主要是 ABA)则在第Ⅱ期结束之前开始增加,第Ⅲ期大量累积,此时也正是果实成熟期。外施 ABA 可显著促进跃变期前杏果的呼吸并使成熟提前,但对跃变期后的果实呼吸有抑制作用。对 ABA、乙烯与果实成熟之间的相互关系进行了讨论。更多还原

【Abstract】 Changes in levels of growth regulating substances during fruit development and matu- ration and the effects of abscisic acid application on ripening of apricot fruits were investiga- ted.The results showed that the levels of growth promoting substances were high,but star- ted to decrease rapidly just before the end of stage Ⅱ and continued throughout stage Ⅲ. The promoting substances almost disappeared in fully ripe fruits.The ABA-like inhibiting substances first appeared during the end of stage Ⅱ,increased significantly in stage Ⅲ,and reached a maximum level in fully ripe fruits.Exogenous ABA application enhanced fruit re- spiration rate and accelerated the ripening process when applied to preclimacteric fruits but inhibited these processes when applied to post-climacteric fruits.The above results sugges- ted that the ABA may play an important role in apricot fruit ripening.The interrelationship Of ABA,ethylene,and fruit ripening was discussed.更多还原