The Effects of Light and Temperature on Different Phases of the Life Cycle in the Carrageenan Producing Alga Chondracanthus chamissoi (Rhodophyta, Gigartinales)
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C. R. Bulboa
Abstract
Growth of female gametophyte and sporophyte phases of Chondracanthus chamissoi was measured under controlled laboratory conditions, examining effects of different combinations of photon flux density and temperature. Apical segments of both (isomorphic) phases of this alga were cultivated in Von Stosch medium using 12 combinations of photon flux density (PFD; 20 to 120 μmol m−2 s−1) and temperature (10 to 25 °C), comparing the wet weights of thalli produced after 15 days. A difference in the growth rate was noted between the isomorphic phases in which the female gametophyte grew more than the sporophyte at 15 °C and above. In both phases, there was a tendency towards increasing growth with increasing temperature, whereas changes in PFD did not produce significant changes in growth in all treatments. However, a significant growth effect due to interaction of the two variables was noted. Within the range of variables studied, temperature was the controlling factor in the growth of Chondracanthus chamissoi mediated by factors of light and life cycle phase. The differential growth of different life cycle phases in response to environmental variables may explain the dominance of one phase over another in natural stands of this alga.
Copyright © 2001 by Walter de Gruyter GmbH & Co. KG
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Articles in the same Issue
- Biomass and Production of the Epiphytes on the Leaves of Cymodocea nodosa in the Canary Islands
- Growth, Tetrasporogenesis, and Life History in Culture of Caulacanthus okamurae (Gigartinales, Rhodophyta) from Korea
- Koorchaloma spartinicola sp. nov., a new marine sporodochial fungus from Spartina alterniflora
- Preliminary Studies on the Growth of Selected ‘Green Tide’ Algae in Laboratory Culture: Effects of Irradiance, Temperature, Salinity and Nutrients on Growth Rate
- Dasya puertoricensis sp. nov. (Dasyaceae, Rhodophyta) from Puerto Rico, Caribbean Sea
- Growth of Fucus vesiculosus L. (Phaeophyta) in the Northern Baltic Proper: Energy and Nitrogen Storage in Seasonal Environment
- Notes on New Records of Red Algae from the Colombian Caribbean
- Acclimation Responses of Gracilaria sp. (Rhodophyta) and Enteromorpha intestinalis (Chlorophyta) to Changes in the External Inorganic Carbon Concentration
- The Effects of Light and Temperature on Different Phases of the Life Cycle in the Carrageenan Producing Alga Chondracanthus chamissoi (Rhodophyta, Gigartinales)
- Identification of Some Easily Confused Common Diatom Species in Arctic Spring Blooms
- Checklist of the Benthic Marine Plants of the Madeira Archipelago
