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Spore ontogeny of the arbuscular mycorrhizal fungus Archaeospora trappei (Ames & Linderman) Morton & Redecker (Archaeosporaceae)

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Abstract

Arbuscular mycorrhizal (AM) fungi in the genus Archaeospora (family Archaeosporaceae) contain both monomorphic and dimorphic species. The synanamorphism is often hard to discern without ontogenetic observations. Here, the spore ontogeny of Ar. trappei is reported from single species pot culture studies. The sporogenous hypha swelled up to a terminal sporiferous saccule and produced a lateral spore primordium on its neck. The saccule expanded fully before the spore primordium emerged. The saccule transferred its contents into the expanding spore and collapsed while wall differentiation continued inside the spore. The spore wall of Ar. trappei differentiated sequentially, in discrete steps, as in Acaulosporaceae members. In contrast, Ar. trappei produced a simplified spore wall in which the components differed in chemical and physical characteristics from those of the Acaulosporaceae members. Ontogenetic studies confirmed Ar. trappei to be monomorphic and producing acaulosporoid spores. The fungus is a new record to New Zealand.

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Acknowledgements

Thanks to Ann Bell, Victoria University of Wellington, for supervising this research and for useful suggestions on the presentation of data. Thanks to Lynnette Abbott and Zakaria Solaiman (The University of Western Australia) and two manuscript reviewers for their critical comments.

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  1. Kalideen M. Hafeel

    Present address: School of Earth and Geographical Sciences, Faculty of Natural and Agricultural Sciences, The University of Western Australia, 35 Stirling Highway, WA 6009, Crawley , Australia

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  1. School of Biological Sciences, Victoria University of Wellington, P.O. Box 600, Wellington, New Zealand

    Kalideen M. Hafeel

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Correspondence to Kalideen M. Hafeel.

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Hafeel, K.M. Spore ontogeny of the arbuscular mycorrhizal fungus Archaeospora trappei (Ames & Linderman) Morton & Redecker (Archaeosporaceae). Mycorrhiza 14, 213–219 (2004). https://doi.org/10.1007/s00572-004-0300-y

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  • DOI: https://doi.org/10.1007/s00572-004-0300-y

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