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Visualizing Early Infection Sites of Rice Blast Disease Magnaporthe oryzae on Barley Hordeum vulgare Using a Basic Microscope and a Smartphone
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[Effect of peroxisome proliferators to growth and pathogenicity of Magnaporthe oryzae]

Haili Chen, Ling Li, Jiaoyu Wang

    Wei Sheng Wu Xue Bao = Acta Microbiologica Sinica
    |May 10, 2018
    PubMed
    Abstract

    Insights

    Peroxisome proliferations (PPs) increase peroxisomes in Magnaporthe oryzae, inhibiting fungal growth and pathogenicity. This study is the first to investigate PPs

    Area of Science:

    • Mycology
    • Plant Pathology
    • Cell Biology

    Background:

    • Magnaporthe oryzae is a devastating fungal pathogen causing rice blast.
    • Peroxisomes play crucial roles in fungal development and pathogenicity.
    • Peroxisome proliferations (PPs) are compounds known to induce peroxisome biogenesis.

    Purpose of the Study:

    • To investigate the impact of six different PPs on the growth, development, and pathogenicity of M. oryzae.
    • To examine the effect of PPs on peroxisome proliferation and related gene expression in M. oryzae.

    Main Methods:

    • M. oryzae strain Guy11 was treated with six PPs.
    • Peroxisome proliferation and expression of PEX14, PEX8, and PEX11 genes were quantified.
    • Vegetative growth, conidial germination, appressoria formation, and pathogenicity were assessed and compared to controls.
    • The effect of 2,4-D and aspirin (ASA) on wild-type and mutant strains (Δpex5, Δpex7) was evaluated.

    Main Results:

    • PPs significantly increased peroxisome quantity and expression of PEX genes (PEX14, PEX8, PEX11).
    • Most PPs inhibited vegetative growth, conidial germination, appressoria formation, and pathogenicity.
    • 2,4-D and ASA showed the highest inhibition rates.
    • Inhibition of vegetative growth by 2,4-D and ASA was more pronounced in Δpex5 and Δpex7 mutants compared to the wild type.

    Conclusions:

    • PPs induce peroxisome proliferation in M. oryzae.
    • PPs inhibit fungal growth, development, and pathogenicity.
    • This study provides the first evidence of PPs affecting filamentous fungi, offering potential avenues for disease management.

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