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The Partition Layer of Common Bunt Teliospores

Published online by Cambridge University Press:  02 July 2020

W.M. Hess  and
D.J. Weber
W.M. Hess
Affiliation:
Department of Botany and Range Science, Brigham Young University, Provo, Utah, 84602, U.S.A.
D.J. Weber
Affiliation:
Department of Botany and Range Science, Brigham Young University, Provo, Utah, 84602, U.S.A.
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Abstract

The basidiomycete fungus, Tilletia constitutes the most important group of smuts economically as they infect cereal grains which provide a major portion of the world’s food supply. The teliospores of the smuts which have been studied have a spore wall layer called the partition layer or the striated zone which is very resistant to fixatives and resins used for electron microscopy. We assume that the chemical nature of this wall layer is the primary factor to prevent spore desiccation and to maintain spore viability for many years. Teliospores of Tilletia tritici (Bjerk.) Wint. (formerly T. caries), T. controversa Kühn, T. indica Mitra, and Neovossia horrida (Tak.) Padwick and Khan all have a reticulated exterior spore layer (sheath). Common bunt, Tilletia laevis Kühn (formerly T. foetida) teliospores lack this exterior reticulated layer, but are also resistant to spore desiccation and maintain viability for many years. Therefore, the purpose of this study was to compare the ultrastructural characteristics of the partition layer of T. laevis teliospores with the partition layer of other teliospores of smut fungi which have been studied.

Type
Emerging Pathogens: Something Old, Something New (Organized By S. Miller and D. Howell)
Information
Microscopy and Microanalysis , Volume 7 , Issue S2: Proceedings: Microscopy & Microanalysis 2001, Microscopy Society of America 59th Annual Meeting, Microbeam Analysis Society 35th Annual Meeting, Long Beach, California August 5-9, 2001 , August 2001 , pp. 174 - 175
Copyright
Copyright © Microscopy Society of America 2001

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