Microbial induction of resistance in tomato against root-knot nematode Meloidogyne javanica with biocontrol agents

Abstract

To investigate the effect of some bacterial and algal strains on induction of resistance against root-knot nematode (Meloidogyne javanica) in tomato (Solanum lycopersicum L.) roots.Application of Bacillus subtilis, Serratia marcescens, and Spirulina platensis on root area of nematode infected tomato plant, the number invading nematode, M. javanica, galls and egg masses in tomato roots were determined.The reduction percentage (94.97%) of developmental stages of root-knot nematode was highest in S. platensis treatment, among the biological agents and compared to 97.48 % in chemical pesticide Vydate treatment. The highest reduction percentage (90.43%) in female numbers was recorded with B. subtilis. All tested bioagents significantly increased vegetative weight of tomato plants. B. subtilis, S. marcescens and S. platensis increased the activity of peroxidase, polyphenol oxidase, superoxide dismutase and catalase in tomato plants infected with M. javanica.Biological control of nematodes using alga and bacteria that could potentially enhance plant health, productivity and promotes its growth.

Induction of Resistance of Antagonistic Bacterium Burkholderia contaminans to Postharvest Botrytis cinerea in Rosa vinifera

“…However, it will increase the drug resistance of pathogenic microorganisms, lead to the accumulation of toxic substances in the human body, and cause environmental pollution. Therefore, it is necessary to develop more practical preservatives to ensure the freshness of fruits and vegetables [ 12 ]. In this paper, Burkholderia contaminans of Burkholderia was used as the biocontrol strain to explore the antagonistic mechanism of antagonistic bacteria against postharvest gray mold of grape fruit, so as to lay a foundation for improving the economic value of food use.…”

Biological Control of Melon Continuous Cropping Obstacles: Weakening the Negative Effects of the Vicious Cycle in Continuous Cropping Soil

“…After inoculation with Bacillus subtilis C3, the number of root-knot nematodes in the soil was significantly reduced. It may be that the secondary metabolites of biocontrol bacteria restrict the growth of RKNs or that the addition of biocontrol bacteria increases the resistance ability of crops ( 35 – 37 ). Bacillus subtilis C3 antagonized pathogens and RKNs, decomposed self-toxic substances, and provided more favorable conditions for the soil environment of plant growth.…”