Microbial Ecology

, Volume 63, Issue 3, pp 619–627 | Cite as

Symbiotic Fungal Flora in Leaf Galls Induced by Illiciomyia yukawai (Diptera: Cecidomyiidae) and in Its Mycangia

  • Shun Kobune
  • Hisashi Kajimura
  • Hayato Masuya
  • Takanori Kubono
Host Microbe Interactions


We investigated the association between a gall midge, Illiciomyia yukawai, and its symbiotic fungi on Japanese star anise, Illicium anisatum. The number of fungal species isolated from the galls increased with development of the galls, whereas those from the leaves showed a different trend. Botryosphaeria dothidea was dominant in the galls from June to October, and after that Phomopsis sp. 1, Colletotrichum sp., and Pestalotiopsis sp. became dominant. Although B. dothidea was not isolated from the leaves, it was detected from mycangia (abdominal sternite VII) of egg-laying adults at a high isolation frequency (>90%). However, B. dothidea was not isolated from mycangia of adults emerging from galls that were enclosed by plastic bags. This indicates that I. yukawai is closely associated with B. dothidea and that its newly emerged adults do not take the fungus into mycangia directly from the galls where they had developed. Also, the fungus from the fungal layers of ambrosia galls has less ability to propagate on artificial media despite the presence of its mycelial mass in mature galls.

Supplementary material

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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Shun Kobune
    • 1
  • Hisashi Kajimura
    • 1
  • Hayato Masuya
    • 2
  • Takanori Kubono
    • 2
  1. 1.Graduate School of Bioagricultural ScienceNagoya UniversityNagoyaJapan
  2. 2.Forestry and Forest Products Research InstituteTsukubaJapan

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