The interaction apparatus of Asteridiella callista (Meliolaceae, Ascomycota).
We document here for the first time ultrastructural details of the cellular interaction of Asteridiella callista and its host Stachytarpheta mutabilis var. violacea from Costa Rica. A. callista attaches to the host with appressoria, invades the epidermal cell wall and forms an apoplastic complex cisternal net, presumably for nutrient uptake from its host. This unique structure, called an interaction apparatus (Ia), consists of cisternae surrounded by a membrane continuous with the fungal cytoplasmic membrane. Subsequently the apoplastic trunk of the Ia extends into the host epidermal cell wall and contacts the host cytoplasmic membrane. Electron-opaque material, probably of fungal origin appears at the host cytoplasmic membrane. Finally these electron-opaque deposits are encased by host material. Functional and systematical aspects of this interaction scenario are discussed.
Universität Tübingen, Institut für Evolution und Ökologie, Evolutionäre Ökologie der Pflanzen, Auf der Morgenstelle 1, 72076 Tübingen, Germany Universidad Autónoma de Chiriquí, El Cabrero, Chiriquí, Panamá
Délfida Rodríguez
DR
Justavino
Julieta Carranza
JC
Velásquez
Carlos O
CO
Morales Sánchez
Rafael
R
Rincón
Franz
F
Oberwinkler
Robert
R
Bauer
D001203:Ascomycota / Q000254:growth & development / Q000502:physiology* / Q000648:ultrastructure; D003364:Costa Rica; D025301:Hyphae / Q000254:growth & development / Q000502:physiology / Q000648:ultrastructure; D010935:Plant Diseases / Q000382:microbiology*; D029648:Verbenaceae / Q000382:microbiology* / Q000502:physiology
Costa Rica; Stachytarpheta mutabilis var. violacea; Verbenaceae; appressorium; cellular interaction; cisternal tubules; concentric bodies