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Related Experiment Video

Updated: Jun 24, 2026

Using Ustilago maydis as a Trojan Horse for In Situ Delivery of Maize Proteins
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Published on: February 8, 2019

Ethylene Production by Meloidogyne spp.-Infected Plants.

I Glazer, D Orion, A Apelbaum

    Journal of Nematology
    |March 19, 2009
    PubMed
    Summary

    Meloidogyne javanica infection significantly increases ethylene production and gall size in dicotyledonous plants, but not monocotyledonous plants. Different Meloidogyne species elicit varying responses in tomato root cultures.

    Area of Science:

    • Plant Pathology
    • Nematology
    • Plant Physiology

    Background:

    • Plant-parasitic nematodes, such as Meloidogyne species, cause significant agricultural damage worldwide.
    • Root-knot nematodes induce characteristic galls and alter plant physiology, impacting crop yields.
    • Ethylene, a plant hormone, plays a role in plant defense and stress responses.

    Purpose of the Study:

    • To investigate the effect of Meloidogyne javanica infection on ethylene production and gall formation in various host plants.
    • To compare the responses of dicotyledonous and monocotyledonous plants to M. javanica infection.
    • To analyze the differential effects of M. javanica and Meloidogyne hapla on ethylene production and gall development in excised tomato roots.

    Main Methods:

    • Gall size and ethylene production rates were measured in various dicotyledonous and monocotyledonous plants infected with Meloidogyne javanica.
    Keywords:
    M. haplaMeloidogyne javanicadicotyledongall sizemonocotyledon

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  • Excised tomato root cultures were infected with either M. javanica or M. hapla to assess specific nematode-host interactions.
  • Ethylene production was quantified using gas chromatography or similar methods.

    • Main Results:

    • M. javanica infection led to increased ethylene production and large gall formation in dicotyledonous plants (cabbage, pea, carrot, cucumber, carnation, tomato).
    • Monocotyledonous plants (corn, wheat, onion) showed no significant increase in ethylene production or gall formation upon M. javanica infection.
    • Excised tomato roots infected with M. javanica exhibited high ethylene production and large galls, while M. hapla infection resulted in low ethylene production and smaller galls.

    Conclusions:

    • Dicotyledonous plants are more susceptible to gall formation and exhibit altered ethylene production when infected by M. javanica.
    • Monocotyledonous plants display resistance to gall induction and ethylene changes by M. javanica.
    • The species of Meloidogyne nematode influences the extent of gall formation and ethylene biosynthesis in host plants, with M. javanica being a more potent inducer.