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Acta Horticulturae Sinica ›› 2024, Vol. 51 ›› Issue (8): 1913-1926.doi: 10.16420/j.issn.0513-353x.2023-0306

• Plant Protection • Previous Articles     Next Articles

Effect of Rhizosphere Microorganisms Induced by Potato-Onion on Tomato Root-Knot Nematode Disease

GONG Xiaoya, LI Xian, ZHOU Xingang*(), WU Fengzhi*()   

  1. Key Laboratory of Biology and Genetic Improvement of Horticultural Crops,Ministry of Agriculture and Rural Affairs,College of Horticulture and Landscape Architecture,Northeast Agricultural University,Harbin 150030,China
  • Received:2024-01-15 Revised:2024-04-29 Online:2024-08-25 Published:2024-08-22
  • Contact: ZHOU Xingang, WU Fengzhi

Abstract:

High-throughput sequencing and plant-soil feedback were used in this study,the effect of potato-onion companion induced tomato rhizosphere microorganisms on the tomato toot-knot nematode disease,soil microbial community structure and induced resistance were studied. The results showed that potato-onion companion induce the tomato rhizosphere microorganisms to decreased the tomato disease index,root-knot number and root-knot index and increased the Meloidogyne incognita egg hatching and the lethality rate. Under root-knot nematode stress,the Bacillus and Pseudomonas relative abundance were increased in tomato rhizosphere. Meanwhile,potato-onion companion changes tomato rhizosphere microbes enhanced systemic resistance by increasing expression of resistance-related genes,defense enzyme activity and JAs activity. In conclusion,potato-onion companion with tomato changed tomato rhizosphere microorganisms not only has direct inhibition effect on root-knot nematode,but also enhances resistance to root-knot nematode by inducing resistance.

Key words: tomato, root-knot nematodes, potato-onion, companion, rhizosphere microorganisms, induce systemic resistance