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Influence of conidial traits and leaf structure on attachment success of aquatic hyphomycetes on leaf litter

Dang, Christian K. and Gessner, Mark O. and Chauvet, Eric Influence of conidial traits and leaf structure on attachment success of aquatic hyphomycetes on leaf litter. (2007) Mycologia, vol. 99 (n° 1). pp. 24-32. ISSN 0027-5514

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Official URL: http://dx.doi.org/10.3852/mycologia.99.1.24

Abstract

Attachment of conidia on leaves is a critical first step in the life cycle of aquatic hyphomycetes in streams. In a first series of microcosm experiments, attachment success of three common aquatic hyphomycete species differing in conidial shape (compact, filiform and tetraradiate) was determined on two leaf species, black alder and downy oak. Fungal species identity and leaf surface structure significantly affected conidial attachment after 24 h. The lower sides of oak leaves with extensive tufts trapped 2.4-8.8 more conidia than the upper sides of oak leaves and both sides of alder leaves. In a second experiment with seven fungal species, attachment success of two species with tetraradiate conidia was much greater than that of two other tetraradiate and three compact conidia, which all had similar attachment success. The species with the largest spores was also the most successful, but this pattern was not consistent across the size range of tested conidia. These results highlight the importance of leaf surface structure, possibly conidial shape and size and additional properties of aquatic hyphomycete conidia in determining attachment success on leaves and they point to the potential role of these factors. in structuring fungal communities on decomposing leaves in streams.

Item Type:Article
Additional Information:Thanks to the Mycological Society of America. The definitive version is available at : http://www.mycologia.org/content/99/1/24.short
HAL Id:hal-01302323
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Swiss Federal Institute of Aquatic Science and Technology - EAWAG (SWITZERLAND)
Other partners > Eidgenössische Technische Hochschule Zürich - ETHZ (SWITZERLAND)
Laboratory name:
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Deposited By: Eric Chauvet
Deposited On:13 Apr 2016 14:45

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