盖氏假单胞菌PG-9对苹果根系内生细菌群落的影响

盖氏假单胞菌PG-9对苹果根系内生细菌优势属的影响见表10。经PG-9菌株处理后，分枝杆菌属相对丰度从86.95%下降到78.85%，降低10.27%，朱氏杆菌属从0.84%下降到0.45%，降低了86.67%。而芽孢杆菌属从0.10%上升至3.53%，提高了35.3倍；寡养单胞菌属从0.02%升至2.32%，提高了140.96倍，假单胞菌属相对丰度从0.08%上升至1.21%，提高了14.13倍，但差异均不显著（P>0.05）。结果表明，施用盖氏假单胞菌PG-9可限制根系有害微生物的增长，促进有益微生物的增长。

Effect of Pseudomonas aeruginosa PG-9 on the composition of endophytic bacterial communities in apple root system

The impact of Pseudomonas aeruginosa PG-9 on the dominant genera of endophytic bacteria in the apple root system is shown in Table 10. After treatment with the PG-9 strain, the relative abundance of the genus Rhizobium decreased from 86.95% to 78.85%, a decrease of 10.27%. The genus Azospirillum decreased from 0.84% to 0.45%, a decrease of 86.67%. However, the genus Bacillus increased from 0.10% to 3.53%, an increase of 35.3 times. The genus Paenibacillus increased from 0.02% to 2.32%, an increase of 140.96 times. The relative abundance of the genus Pseudomonas increased from 0.08% to 1.21%, an increase of 14.13 times. However, these differences were not significant (P>0.05). These results indicate that the application of Pseudomonas aeruginosa PG-9 can limit the growth of harmful microorganisms in the root system and promote the growth of beneficial microorganisms.