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Related Experiment Videos

A method for staining infection hyphae in pine leaves.

J Nair

    Stain Technology
    |January 1, 1976
    PubMed
    Summary
    This summary is machine-generated.

    A new differential staining method effectively distinguishes fungal germ tubes from infection hyphae in Pinus radiata leaves. This technique aids in understanding plant-fungus interactions and disease development.

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    Area of Science:

    • Plant Pathology
    • Mycology
    • Forest Science

    Background:

    • Fungal infections in Pinus radiata (radiata pine) can impact forest health and productivity.
    • Accurate identification and differentiation of fungal structures are crucial for understanding infection pathways.
    • Distinguishing between surface-level fungal growth and invasive hyphae is essential for disease management.

    Purpose of the Study:

    • To develop and evaluate a novel differential staining technique for visualizing fungal structures on Pinus radiata leaves.
    • To differentiate between fungal conidia, germ tubes, appressoria, and infection hyphae.
    • To provide a reliable method for studying early-stage fungal invasion in radiata pine.

    Main Methods:

    • Pinus radiata leaves inoculated with fungus were fixed and stained using periodic acid-Schiff (PAS) reagent.

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  • Leaf sections with fungal material were further stained with lactophenol cotton blue.
  • Microscopic examination was performed on mounted leaf sections to observe stained fungal structures.

    • Main Results:

    • Fungal conidia and germ tubes on the leaf surface stained red with the PAS reagent.
    • Appressoria, the specialized infection structures, remained unstained.
    • Infection hyphae penetrating the leaf tissue stained blue with lactophenol cotton blue.

    Conclusions:

    • The differential staining method clearly distinguishes between external fungal germ tubes and internal infection hyphae.
    • This technique is valuable for studying the initial stages of fungal pathogenesis in Pinus radiata.
    • The method facilitates a better understanding of host-pathogen interactions in forest ecosystems.