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Sclerotia Formation by Rhizoctonia Species and their Survival

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Rhizoctonia Species: Taxonomy, Molecular Biology, Ecology, Pathology and Disease Control

Abstract

Rhizoctonia has a “loose type” of sclerotium that is not organized into a rind, cortex, and medulla, and only Rhizoctonia spp. have sclerotia of this type (Townsend and Willetts, 1954). Isolates of AG 1-IA that have “sasaldi type” sclerotia are exceptional and have dark outer cells and have been referred to as a “primitive rind type” (Tu and Kimbrough, 1975). Sclerotia are formed primarily from compact masses of monilioid cells, but they may be formed from undifferentiated hyphae. The barrel-shaped cells average 20–22μm wide, and 30–35μm long, and are thicker than the ordinary hyphae. The central area of the sclerotium may have a pseudo-parenchymatous appearance. The sclerotia enlarge by repeated branching and formation of new cells (Townsend and Willetts, 1954). Sclerotial cells have the same number of nuclei as undifferentiated hyphae (Tu and Kimbrough, 1975).

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Authors and Affiliations

  1. Department of Plant Pathology, University of Georgia, Coastal Plain Experiment Station, Tifton, GA, 31793-0748, USA

    Donald R. Sumner

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  1. Donald R. Sumner
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Editors and Affiliations

  1. Tel Aviv University, Ramat Aviv, Tel Aviv, Israel

    Baruch Sneh

  2. McDonald Campus, McGill University, Quebec, Canada

    Suha Jabaji-Hare

  3. CSIRO, Division of Soils, Adelaide, South Australia, Australia

    Stephen Neate

  4. Research Institute for Plant Protection (IPO-DLO), Wageningen, The Netherlands

    Gerda Dijst

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© 1996 Springer Science+Business Media Dordrecht

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Sumner, D.R. (1996). Sclerotia Formation by Rhizoctonia Species and their Survival. In: Sneh, B., Jabaji-Hare, S., Neate, S., Dijst, G. (eds) Rhizoctonia Species: Taxonomy, Molecular Biology, Ecology, Pathology and Disease Control. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-2901-7_18

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  • DOI: https://doi.org/10.1007/978-94-017-2901-7_18

  • Publisher Name: Springer, Dordrecht

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  • Online ISBN: 978-94-017-2901-7

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