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- Title
THE RED ALGAL EPIPHYTES <em>MICROCLADIA COULTERI</em> AND <em>M. CALIFORNICA</em> (RHODOPHYCEAE, CERAMIACEAE). II. BASIPHYTE SPECIFICITY.
- Authors
Gonzales, Mariela A.; Goff, Lynada J.
- Abstract
The phenomenon of baxiphyte specificity in the settlement and growth of the red algal epiphytes Microcladia californica Farl and M. coulteri Harv, was examined by studying the interface with their respective basiphytes and by cross-inoculation experiments. Microcladia californica attaches only to the surface of its single basiphytes Egregia menziesii (Aresch.) Turn. Whereas M. coulteripenetrates the tissue of a wide range of basiphytes. The pattern of primary rhizoid development in both epiphytes determines the mode of attachment and may influence the range of basiphytes possible for each epiphyte. Cross-inoculation experiments show that Microcladia californica is not able to colonize the basiphtes of M. coulteri, Irideas and Prioniis, or Ulva. The mechanisms by which these algae restrict the growth of epiphytes include short life-span, "cuticle peeling" and chemical defense. Microcladia coulteri, which naturally colonizes iridaea and Prionitis, has evolved mechanismas to counteract the antifouling effects of those basiphytes. The question of why Egregia is the exclusive substratum for M. californica remains undermined. However, egregia may provide the appropriate ecological conditions and a surface topography conducive to M. californica spore settlement and growth.
- Subjects
ANATOMY; PLANT inoculation; EGREGIA; PLANT cuticle; EPIPHYTES; IRIDAEA
- Publication
Journal of Phycology, 1989, Vol 25, Issue 3, p558
- ISSN
0022-3646
- Publication type
Article
- DOI
10.1111/j.1529-8817.1989.tb00262.x