1973
Observations on the life-history of Bryopsis hypnoides Lamour. from Newfoundland: a new variation in culture
Publication
Publication
Acta botanica neerlandica , Volume 22 - Issue 1 p. 1- 5
At its northernmost distributional limit in northeastern America, in Newfoundland, Bryopsis hypnoides Lamour. appears to have a heteromorphic, monophasic life-history. Zygotes resulting from fusion of anisogametes develop in culture into prostrate filamentous germlings, these also reproducing sexually by anisogametes to form a new generation of the prostrate type. Erect Bryopsis later grew from the prostrate phase: asexual stephanokontic zooids were entirely absent. The life-history in Newfoundland compares in part with that for B. hypnoides from northern parts of its European range ; the presence of sexual reproduction in the prostrate phase in Newfoundland, however, is unique in Bryopsis and is not apparently a temperature dependent phenomenon. In the field Newfoundland B. hypnoides reaches sexual maturity in winter at temperatures less than 0°C. Germling phases studied in culture could not be located in the field. The question is raised as to the possible genetic isolation of Newfoundland B. hypnoides from populations in Europe.
Additional Metadata | |
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Acta botanica neerlandica | |
CC BY 3.0 NL ("Naamsvermelding") | |
Organisation | Koninklijke Nederlandse Botanische Vereniging |
Robert B. Bartlett, & G. Robin South. (1973). Observations on the life-history of Bryopsis hypnoides Lamour. from Newfoundland: a new variation in culture. Acta botanica neerlandica, 22(1), 1–5. |