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BONNEMAISONIA HAMIFERA HARIOT IN NATURE AND IN CULTURE(2) (3)
L C Chen1, T Edelstein1, J McLachlan1
1Atlantic Regional Laboratory, National Research Council of Canada, Halifax, Nova Scotia.
Journal of Phycology
|April 21, 2016
Summary
Tetraspores of Sonnemaisonia hamifera exclusively produced male gametophytes in culture. Vegetative propagation is likely the primary reproductive method for this red alga species in nature.
Area of Science:
- Marine Biology
- Algology
- Reproductive Biology
Background:
- Sonnemaisonia hamifera is a red alga with a complex life cycle.
- The relationship between its sporophyte and gametophyte phases requires further investigation.
Purpose of the Study:
- To investigate the reproductive potential of tetraspores from Trailliella intricata, the sporophyte of Sonnemaisonia hamifera.
- To determine the occurrence and characteristics of gametophytes in the Gulf of St. Lawrence and Atlantic coast of Nova Scotia.
Main Methods:
- Culture of tetraspores from Trailliella intricata.
- Field observations of tetrasporangia and gametophytes in natural habitats.
Main Results:
- Tetraspores in culture exclusively developed into male gametophytes.
- Tetrasporangia were observed annually in autumn in the Gulf of St. Lawrence, but mature gametophytes were absent.
- Gametophytes bearing antheridia were found during winter on the Atlantic coast of Nova Scotia.
Conclusions:
- The sporophyte phase (Trailliella intricata) of Sonnemaisonia hamifera appears to generate only male gametophytes.
- Vegetative propagation is suggested as the predominant mode of reproduction for both phases in natural environments.
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