盖氏假单胞菌 PG-9 对苹果果实品质的影响

盖氏假单胞菌 PG-9 对果实品质的影响见表 4。2021 年、2022 年 PG-9 菌株处理果型指数、果实硬度无明显差异，其外在品质指标与对照无显著差异（P>0.05）；2021 年和 2022 年的可溶性酸含量分别为 0.17%、0.15%，分别比对照降低了 29.17%、34.78%，均与对照间差异显著（P<0.05）；可溶性糖含量分别为 10.79%、11.32%，分别较对照提高 15.40%、30.41%，均与对照差异显著（P<0.05）；PG-9 菌株处理可溶性固形物、Vc 含量分别为 13.16%、13.13% 和 2.49mg/kg、2.52 mg/kg，分别比对照提高 1.39%、1.43% 和 19.71%、18.31，结果说明，施用盖氏假单胞菌 PG-9 能够改善苹果果实品质。

The impact of Pseudomonas fluorescens PG-9 on fruit quality is shown in Table 4. In 2021 and 2022, there were no significant differences in fruit shape index and fruit hardness between the PG-9 treated samples and the control group (P>0.05). The external quality indicators of the treated samples were not significantly different from the control. However, the soluble acid content in 2021 and 2022 decreased by 29.17% and 34.78% respectively compared to the control, with significant differences (P<0.05). The soluble sugar content increased by 15.40% and 30.41% respectively in 2021 and 2022 compared to the control, with significant differences (P<0.05). The PG-9 treated samples had higher soluble solid content and vitamin C content, with increases of 1.39% and 1.43% respectively in soluble solid content and 19.71% and 18.31% respectively in vitamin C content compared to the control. These results indicate that application of Pseudomonas fluorescens PG-9 can improve the quality of apple fruits.