以黄冠梨果实为试材，研究幼果期果柄涂抹GA3对黄冠梨呼吸乙烯特性、品质形成及常温贮藏期间品质变化及贮藏性能的影响。结果表明，黄冠梨为典型的呼吸跃变型果实，GA3处理对果实的呼吸及乙烯释放均有一定的促进作用，可加速果实后熟。GA3处理增加了采后贮藏前期果实可溶性固形物、可滴定酸和Vc含量，使黄冠梨果实贮藏品质保持性优于相应的未处理果实；GA3处理显著加重了黄冠梨果实常温贮藏期间鸡爪病与褐心病的发生率，发病率分别是相应对照果实的2.13和1.12倍。综上所述，GA3处理能显著增加贮藏前期果实营养物质含量，保持果实品质，但也降低了果实的耐贮性，促进果实病变。

With Huangguan pear as the test material， the effects of GA3 application on its ethylene respiration characteristics， quality change and storage performance during the storage at room temperature were studied. The results showed that Huangguan pear was a typical climacteric fruit， and GA3 treatment could promote respiration and ethylene release， and accelerate fruit ripening. GA3 treatment increased the content of soluble solids， titratable acid and Vc in the fruit at the early stage of post-harvest storage， which made the storage quality of Huangguan better than that of the corresponding control fruit. GA3 treatment significantly increased the incidence of chicken feet and brown heart in Huangguan pear fruits during storage at room temperature，which were 2.13 and 1.12 times higher than those of the corresponding control fruits. In summary， GA3 treatment can significantly increase the nutrient content of fruits in the early storage period and maintain the quality of fruits， but it also lowers the storage preformance and promotes fruit pathological changes.

TS255.1

公益性行业(农业)科研专项经费项目(201303075)。