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Orbilia blumenaviensis and its Arthrobotrys anamorph

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Abstract

A member of the nematophagous anamorph genus Arthrobotrys was isolated from its teleomorph Orbilia blumenaviensis comb. nov. (= Orbilia fici), a species closely related to O. auricolor but deviating in having lanceolate paraphyses. In the presence of nematodes, the anamorph forms three-dimensional adhesive networks. A trimorphism in its conidia was observed which vary in shape and number of septa. In the first isolate, two types of heteropolar conidia were obtained. These differ markedly from the type strain of A. vermicola, which forms mainly homopolar (fusoid) conidia. In a further ascospore isolate of O. blumenaviensis, however, mainly fusoid conidia referable to A. vermicola occurred. Combining morphological and phylogenetic analysis, we conclude that these isolates with differently shaped conidia and/or differences in the ITS rDNA (ca. 2–4%) belong to a single anamorph species, A. vermicola. Both teleomorph and anamorph are illustrated and described.

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Abbreviations

*:

Living state

†:

Dead state

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Acknowledgements

This work was jointly financed by ‘National Basic Research Program of China’ (2007CB411600), National Natural Science Foundation Program of PR China (30860004, 30960017, 31060008), Grants from the Young Academic and Technical Leader Raising Foundation of Yunnan Province (2010CI020, 2010CI106), and grant from Yunnan University (2010ZD004). Two anonymous reviewers are thanked for their detailed comments on this paper.

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Authors and Affiliations

  1. Laboratory for Conservation and Utilization of Bio-resources, and Key Laboratory for Microbial Resources of the Ministry of Education, Yunnan University, Kunming, Yunnan, 650091, People’s Republic of China

    Min Qiao, Ying Zhang, Shi-Fu Li, Ke-Qin Zhang & Ze-Fen Yu

  2. Blaihofstraße 42, D-72074, Tübingen, Germany

    H.-O. Baral & E. Weber

  3. Center for Environmental Genomics, Department of Biology, McMaster University, Hamilton, ON, L8S 4K1, Canada

    Jian-Ping Xu

  4. Department of Biology and Chemistry, Dali College, Dali, 67000, People’s Republic of China

    Hong-Yan Su

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  1. Min Qiao
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  2. Ying Zhang
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  3. Shi-Fu Li
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  4. H.-O. Baral
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  7. Jian-Ping Xu
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  8. Ke-Qin Zhang
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  9. Ze-Fen Yu
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Corresponding author

Correspondence to Ze-Fen Yu.

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Min Qiao and Ying Zhang contributed equally to this work.

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Qiao, M., Zhang, Y., Li, SF. et al. Orbilia blumenaviensis and its Arthrobotrys anamorph. Mycol Progress 11, 255–262 (2012). https://doi.org/10.1007/s11557-011-0744-3

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  • DOI: https://doi.org/10.1007/s11557-011-0744-3

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