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Bacteria within ovules and seeds

J O Mundt, N F Hinkle

    Applied and Environmental Microbiology
    |November 1, 1976
    PubMed
    Summary
    This summary is machine-generated.

    Plant ovules and seeds harbor diverse bacteria, with isolation rates varying by plant type and seed coat integrity. Bacillus megaterium and Erwinia herbicola were among the most common bacterial species found.

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    Area of Science:

    • Microbiology
    • Plant Science
    • Bacteriology

    Background:

    • Plant reproductive structures, including ovules and seeds, can harbor microbial communities.
    • Understanding the diversity and prevalence of bacteria within these structures is crucial for plant health and propagation.

    Purpose of the Study:

    • To investigate the presence and diversity of bacteria within surface-sterilized ovules and seeds of 27 plant species.
    • To determine the prevalence of bacteria in relation to plant type, seed characteristics, and overwintering status.

    Main Methods:

    • Surface sterilization of plant ovules and seeds.
    • Culturing on a nutrient medium with low agar content.
    • Identification of bacterial isolates to genus and species level.

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    Main Results:

    • Bacteria were isolated from 30% of ovules and varying percentages of seeds (herbaceous, woody, overwintered cereal, and noncereal).
    • No bacteria were found in hard, waxy seeds (Mimosa, yellowwood) or from ovules/seeds with intact coats.
    • Bacillus megaterium, B. cereus, Erwinia herbicola, Flavobacterium devorans, and Pseudomonas fluorescens were the most frequently isolated species.

    Conclusions:

    • Plant ovules and seeds serve as reservoirs for a diverse range of bacteria, with isolation influenced by seed coat properties and plant tissue.
    • The study identified 19 bacterial genera and 46 species, highlighting the significant microbial presence within plant reproductive structures.