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28625C

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Image #   28625C
Name:   Rhizoctonia solani - pathogenic fungus
Copyright:   Copyright 2008 Dennis Kunkel Microscopy, Inc.
Description:   Caption: Rhizoctonia solani - pathogenic fungus. Rhizoctonia solani is a plant pathogenic fungus with a wide host range and worldwide distribution. Seen in this image is the hyphal stage (mycelial stage) with numerous branching filaments. Rhizoctonia solani can cause the condition known as damping off, which is a cause of death of seedlings in a wide variety of plants. It commonly affects important agricultural crops such as cotton, tobacco, soybean, rice and potatoe. R. solani does not produce asexual spores (conidia), thus it is identified only from hyphal / mycelial characteristics. It does occasionally having a sexual stage (called a teleomorph) that produces sexual fruiting structures and basidiospores. Rhizoctonia species also produce specialized hyphae composed of compact cells called monilioid cells. The monilioid cells fuse together to produce hard structures called sclerotia, which are resistant to environmental extremes, allowing the fungus to survive adverse conditions.
Magnification*: x440
Type: SEM
    *(Magnifications are based on a 35mm slide image of 24mm in the narrow dimension.)
Keywords:   09.01.08 28625C Rhizoctonia solani damping off sheath blight plant disease fungal disease agriculture disease stem rot soil fungus soil fungi soil microorganism soil microorganisms soil microbe soil microbes agricultural disease plant pathogen fungal pathogen fungus pathogen pathogenic fungus hyphae hypha mycelium mycelia mycelial branching filament branched filament fungal filament fungal filaments fungal hypha fungal hyphae fungal mycelia fungal mycelium multinucleate seedling death plant death soil pathogen sexual spores basidiospore basidiospores fruiting structure fruiting structures fruiting bodies fruiting body basidiomycete basidiomycetes SEM black scruf mycelia sterilia monilioid cells monilioid cell sclerotia sclerotium teleomorph sexual stage agricultural crop cotton potatoe potatoes rice soybean soybeans tobacco root rot

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