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PILAYELLA LITTORALIS F. RUPINCOLA FROM WASHINGTON: THE LIFE HISTORY IN CULTURE(1)
1Department of Botany, University of California. Berkeley, California 94720.
Journal of Phycology
|April 12, 2016
Summary
The life history of Pilayella littoralis f. rupincola was studied in culture. Its stable life history in culture supports recognition as a distinct form, not a separate species.
Area of Science:
- Marine Botany
- Algology
- Phycology
Background:
- Pilayella littoralis f. rupincola is a marine brown alga.
- Previous classification proposed species rank for f. rupincola based on morphology and life history.
Purpose of the Study:
- To investigate the life history and morphology of Pilayella littoralis f. rupincola in culture.
- To evaluate the taxonomic status of f. rupincola.
Main Methods:
- Culturing of Pilayella littoralis f. rupincola from Washington.
- Controlled experiments with varying temperature, photoperiod, and light intensity.
- Morphological and life history analysis of cultured and field-collected specimens.
Main Results:
- Cultured plants exhibited a stable life history, producing only unilocular sporangia.
- Morphological features in culture differed from field-collected specimens and the original description.
- Variations in morphology between field and culture specimens challenge species-level recognition.
Conclusions:
- Life history alone is insufficient justification for elevating f. rupincola to species rank.
- The stable life history in diverse culture conditions supports its recognition as a distinct form of Pilayella littoralis.
- Continued recognition of Pilayella littoralis f. rupincola as a distinct form is warranted.
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