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Diversity of fungi on six species of Gramineae and one species of Cyperaceae in Hong Kong

Published online by Cambridge University Press:  30 January 2002

Michelle K. M. WONG
Affiliation:
Centre for Research in Fungal Diversity, Department of Ecology & Biodiversity, The University of Hong Kong, Pokfulam Road, Hong Kong. E-mail: [email protected]
Kevin D. HYDE
Affiliation:
Centre for Research in Fungal Diversity, Department of Ecology & Biodiversity, The University of Hong Kong, Pokfulam Road, Hong Kong. E-mail: [email protected]
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Abstract

Samples of standing senescent culms of Panicum maximum, Pennisetum purpureum, Phragmites australis, Miscanthus floridulus, Saccharum arundinaceum and Thysanolaena maxima (Gramineae), and Schoenoplectus litoralis (Cyperaceae) were collected in Hong Kong between 1997 to 1999. A total of 205 fungal taxa were identified on these samples, including 61 ascomycetes, and 144 mitosporic taxa. Common fungal genera included Diaporthe, Leptosphaeria, Massarina, Ophiobolus and Ophioceras (ascomycetes), and Monodictys, Phaeoisaria, Periconia, Phoma, Phomopsis, Rhinocladiella, Septoria and Sporidesmium (mitosporic taxa). Different grass species were host to different fungal communities and diversities of taxa. Diversity indices for fungi on the hosts varied from 3·3 to 8·7, the highest index being from Pennisetum purpureum, and were overall higher from species offering more durable, strongly sclerenchymatic substrates. No single saprobic fungus collected in this study is thought to be specific to any one grass, however, certain fungi tended to reoccur on single grass species, but not on adjacent grasses. A ‘core fungal group’ was commonly associated with the decaying grasses and this ‘core’ was thought to be important in nutrient cycling in the grasses. A comparison of the fungi occurring on grasses with those on other monocotyledonous hosts is made. The numbers of fungi known to occur on Juncus roemerianus and Phragmites australis are briefly summarised.

Type
Research Article
Copyright
© The British Mycological Society 2001

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Footnotes

Paper presented at the Asian Mycological Congress 2000 (AMC 2000), incorporating the 2nd Asia–Pacific Mycological Congress on Biodiversity and Biotechnology, and held at the University of Hong Kong on 9–13 July 2000.