赤霉素处理对采后柿果实乙烯生物合成的影响

Effect of GA3 Treatment on Ethylene Biosynthesis in Post-harvested Persimmon Fruits

研究了150μg/g和300μg/gGA3处理对一串铃柿果实采后乙烯生物合成的影响。结果表明,两种GA3浓度处理均能显著地抑制ACC的积累,降低EFE的活性,从而显著降低了柿果实内源乙烯的生成,乙烯峰值出现的时间比对照推迟了20d。柿果实采后前期内源乙烯显著减低的原因,主要是GA3降低了EFE的活性,GA3处理的浓度越高对EFE和内源乙烯的影响越大。两种GA3浓度处理均能有效的抑制柿果实硬度的下降,果实采后前期300μg/gGA3处理对柿果实硬度下降的抑制作用更好。

This paper aims at studies made on the effect of 150μg/g and 300μg/g GA3 treatment on post-harvested ethylene biosynthesis of ＂yichuanlin＂ persimmon fruit. The result shows that the two treat- ment can inhibit markedly the accumulation of ACC and EFE activity. It might also lead to a reduced production of endogenous ethylene and to a delay of ethylene peak to appear 20 days later than the controlled. The reason for the reduced production of Endogenous ethylene lies in the decrease of EFE activity. The greater the concentration of GA3, the more effect it has on EFE and endogenous ethylene. The two GA3 concentration treatments can remarkably delay the occurrence of firmness reduction of ＂yichuanlin＂ persimmon fruit. The prohibiting role of 300μg /gGA3 treatment to firmness reduction shows better in prophase of post-harvested.