Life-history regulation in the subtidal red algaCalliblepharis ciliata

Autor:	Anneke M. Breeman, Loes A. H. Venekamp, Frieda J. Molenaar
Rok vydání:	1996
Předmět:	Gametophyte photoperiodism education.field_of_study biology Ciliata media_common.quotation_subject Calliblepharis ciliata Population Growing season Plant Science Aquatic Science Seasonality biology.organism_classification medicine.disease Botany medicine Reproduction education media_common
Zdroj:	European Journal of Phycology. 31:241-247
ISSN:	1469-4433 0967-0262
DOI:	10.1080/09670269600651441
Popis:	The life-history strategy of the subtidal red alga Calliblepharis ciliata has been studied in the field and in laboratory culture. Bi-monthly observations on a C. ciliata population at Roscoff (Brittany, France) revealed a clear seasonal pattern. In April young plants appeared and grew through the summer until they became reproductive in autumn. Release of tetraspores and carpospores occurred in winter, between February and April. Responses to temperature and daylength were determined in culture for an isolate from Roscoff. Tetrasporophytes and gametophytes survived temperatures of c. 5 degrees C up to 25 degrees C, but were undamaged only at 8-20 degrees C. Blade growth took place at 8-18 degrees C in long days and at 8-12 degrees C in short days. Tetrasporophytes reproduced at 8-12 degrees C at daylengths of 8 and 10 h but not 12 h or more. No reproduction was observed in gametophytes. The responses to temperature and photoperiod found in culture accounted well for the seasonal pattern in growth and reproduction observed in the field. C. ciliata is a ''season anticipator'': the favourable growing season in spring is anticipated by reproduction during the winter period.
Databáze:	OpenAIRE
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