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Ethylene production by soil microorganisms

P J Considine, N Flynn, J W Patching

    Applied and Environmental Microbiology
    |April 1, 1977
    PubMed
    Summary
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    Soil fungi Penicillium cyclopium and Penicillium crustosum produce ethylene gas. Ethylene production varied based on carbon substrates, with distinct patterns observed between the two Penicillium species.

    Area of Science:

    • Mycology
    • Plant Physiology
    • Biochemistry

    Background:

    • Ethylene is a crucial plant hormone regulating growth and stress responses.
    • Certain soil microorganisms, including fungi, are known to produce ethylene.
    • Understanding microbial ethylene production is vital for soil ecology and plant-microbe interactions.

    Purpose of the Study:

    • To isolate and identify ethylene-producing fungal strains from soil.
    • To investigate the ability of these fungal isolates to produce ethylene on diverse carbon substrates.
    • To compare the substrate-ethylene production patterns between Penicillium cyclopium and Penicillium crustosum.

    Main Methods:

    • Isolation of fungal strains from soil samples.
    • Cultivation of fungal isolates on various carbon growth substrates, including phenolic acids.

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  • Quantification of ethylene production using gas chromatography or similar analytical techniques.
  • Statistical analysis to compare ethylene production levels and patterns between species.

    • Main Results:

    • Ethylene-producing strains of Penicillium cyclopium and Penicillium crustosum were successfully isolated from soil.
    • Both species demonstrated ethylene production on multiple carbon substrates.
    • Significant variations in ethylene quantities were observed across different substrates.
    • Distinct substrate-ethylene production profiles were identified for P. cyclopium compared to P. crustosum.

    Conclusions:

    • Penicillium cyclopium and Penicillium crustosum are significant sources of soil ethylene.
    • The type of carbon substrate influences the amount of ethylene produced by these fungi.
    • Species-specific differences in substrate utilization for ethylene biosynthesis exist within the Penicillium genus.