Occurrence of the gametophyte of Agarum clathratum (Laminariales, Phaeophyceae) as an endophyte in Orculifilum denticulatum (Gigartinales, Rhodophyceae) |
| |
Authors: | Hideaki Sasaki Sandra C. Lindstrom J. Robert Waaland Hiroshi Kawai |
| |
Affiliation: | Kobe University Research Center for Environmental Genomics, Rokkodai, Kobe 657-8501, Japan;Kobe University Research Center for Inland Seas, Rokkodai, Kobe 657-8501, Japan;Department of Botany, # 3529-6270, University Blvd., University of British Columbia, Vancouver, B.C. Canada V6T 1Z4, USA;Department of Botany, University of Washington, Seattle, WA 98195, USA |
| |
Abstract: | An endophytic filamentous brown alga, growing in the red alga Orculifilum denticulatum Lindstrom, was collected from the north‐east Pacific, near Juneau, Alaska. Within the host tissue, its branched filaments formed a network in the space between the filaments of the host tissues embedded in the host intercellular substances. Cells of the filaments contained many discoid chloroplasts without pyrenoids. Neither microscopic morphological observation nor culturing was sufficient to reveal the specific identity or even the familial affinity of the alga; in contrast, molecular phylogenetic analysis of its rbcL gene and rDNA ITS sequences showed that it was the gametophyte of Agarum clathratum Dumortier (Laminariales). There are few reports of laminarialean gametophytes in nature; this is the first report actually identifying the species of laminarialean gametophyte in a red alga. |
| |
Keywords: | endophytic filamentous brown alga gametophyte Laminariales Agarum clathratum ITS rbcL |
|
|