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以杏优一、龙王帽品种为材料,通过测定开花过程中花瓣的相关生理指标,探讨了杏花开放和衰老的生理机制.结果表明:①在杏花开放过程中,可溶性糖和可溶性蛋白含量、SOD酶活性呈降低—升高—降低的变化;POD酶活性,ABA含量,ABA/GA3,ABA/IAA,ABA/(IAA+GA3)值先降低后升高;脯氨酸和IAA含量先升高后降低;MDA含量和膜透性持续增加,GA3含量持续降低.②杏花开放过程中,SOD,POD酶和脯氨酸在防止膜脂过氧化、保护质膜方面发挥着重要的协同作用;激素动态平衡比单一激素的绝对含量对开花的影响更为重要.③可溶性糖、可溶性蛋白的过量消耗、内源ABA的增加、激素间平衡的失调及膜脂过氧化的加剧而引起膜结构的破坏是杏花衰老的重要原因.可溶性蛋白和可溶性糖含量快速减少,ABA,MDA含量及ABA/IAA,ABA/GA3值的快速增加可作为杏花衰老的重要标志.
The results showed that: (1) During the process of apricot blossom, the contents of soluble sugar and soluble protein (P <0.05). The contents of POD, ABA, ABA / GA3, ABA / IAA and ABA / (IAA + GA3) decreased first and then increased, while the content of proline and IAA MDA content and membrane permeability continued to increase while GA3 content continued to decrease.②In the process of opening apricot flower, SOD, POD and proline play an important synergistic role in preventing membrane lipid peroxidation and protecting the plasma membrane The dynamic balance of hormones is more important than the absolute content of single hormone on flowering.③The excessive consumption of soluble sugar and soluble protein, the increase of endogenous ABA, the imbalance of hormone balance and the exacerbation of membrane lipid peroxidation The structural damage is the important reason for apricot senescence, the content of soluble protein and soluble sugar decrease rapidly, ABA, MDA content and ABA / IAA, ABA / GA3 rapid increase can be used as important markers of apricot senescence.