Animal cells and systems

The Korean Society for Integrative Biology (한국통합생물학회)
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Artificial Reestablishment of the Kelp and Red Algal Symbiosis

  • Kwang Young Kim (Faculty of Earth Systems & Environmental Science and Institute of Marine Sciences, Chonnam National University) ;
  • David J. Garbary (Department of Biology, St. Francis Xavier University)
  • Published : 1999.09.01
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Abstract

A type of symbiosis was previously described from nature in which the gametophytes of Laminariales were endophytic in filamentous red algae. Here we reconstruct this symbiosis for the first time in laboratory culture using zoospores of the kelp, Undaria pinnatifida, and the red alga, Aglaothamnion oosumiense. Zoospores of U. pinnatifida readily attached to A. oosumiense. In 48 h these spores germinated and the initial germ tube penetrated into the host cell wall leaving only an empty zoospore wall outside the host. Within ten days, four to five-celled endophytic gametophytes were present. Zoospores of Laminaria religiosa which were also inoculated into cultures of A. oosumiense rarely attached to the red alga and never became endophytic. Within ten days the free-living gametophytes of L. religiosa on cover slips became fertile and produced young sporophytes. These observations demonstrate the ability of U. pinnatifida to become endophytic, and show differences in host specificity among kelp species.

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References

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