Journal of Environmental Biology

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

Y.S.A. Mazrou^1,2, A.H. Makhlouf³, M.M. Hassan^4,5, A. Baazeem⁵ and M.M. Hassan^5,6* ?? 

¹Department of Business Administration, Community College, King Khaled University, 62529, Kingdom of Saudi Arabia

²Department of Agricultural Economics, Faculty of Agriculture, Tanta University, 3111, Egypt

³Department of Botany, Faculty of Agriculture, Menoufia University, 32514, Egypt

⁴Zoology Department, Faculty of Science, Ain Shams University, 11566, Egypt

⁵Department of Biology, Faculty of Science, Taif University, 21944, Saudi Arabia

⁶Department of Genetics, Faculty of Agriculture, Menoufia University, 32514, Egypt

*Corresponding Author Email : khyate_99@yahoo.com, m.khyate@tu.edu.sa

Paper received: 07.01.2020 ?????? ???????????????????????????????????????Revised received: 16.03.2020 ???????????? ?????????????????????????Accepted: 15.04.2020

Abstract

Aim: 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.

Methodology: 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.

Results: 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.      

Interpretation: Biological control of nematodes using alga and bacteria that could potentially enhance plant health, productivity and promotes its growth.       

Key words: Bacillus subtilis, biological control, root-knot nematode, Serratia marcescens, Spirulina platensis

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