Skip to main content

Open Access Life history and photoperiodic responses in Chondrus giganteus forma flabellatus (Gigartinaceae, Rhodophyta) from Japan

Download Article:
(PDF 1,187.4 kb)


The life history and photoperiodic responses of the carrageenophyte Chondrus giganteus forma flabellatus (Rhodophyta) from Japan were investigated in culture. This entity has a Polysiphonia-type life history and the formation of both tetrasporangia and cystocarps is controlled by daylength. A night-break of 1 h in the middle of a 16 h night was effective in inhibiting reproduction, confirming the classical photoperiodic nature of the response. Tetrasporangia formed at daylengths of 12 h or less, whereas cystocarps only developed at daylengths of 10 h or less. The formation of spermatangia required daylengths of 12 h or less, but production was not inhibited by a night-break of 1 h in the middle of a 16 h night.

Keywords: Chondrus giganteus f. flabellatus; Carrageenophyte; life history; photoperiodism; short-day response

Document Type: Research Article


Affiliations: 1: Science Department, Bath College of Higher Education, Newton Park, Newton St Loe, Bath, BA2 9BN, UK 2: Division of Biological Sciences, Graduate School of Science, Hokkaido University, Sapporo, 060, Japan 3: The Martin Ryan Marine Science Institute and Department of Botany, University College Galway, Galway, Ireland

Publication date: August 1, 1994


Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more
Real Time Web Analytics