Physiological comparison between gametophytes and tetrasporophytes of Gelidium canariensis (Gelidiaceae: Rhodophyta) |
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| Authors: | Sosa P. A. del Río Jiménez M. García-Reina G. |
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| Affiliation: | (1) Institute of Applied Algology, University of Las Palmas, Box 550 Las Palmas, Canary Islands, Spain |
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| Abstract: | The physiological performances of tetrasporophytes and gametophytes of Gelidium canariensis (Grunow) Seoane-Camba were compared to estimate whether the field predominance of tetrasporophytes is due to lower fitness of gametophytes. No significant differences between tetrasporophytes and gametophytes were detected for calorific content, protein and pigment concentrations, NADH-Diaphorase, alkaline phosphatase and glucose-6-phosphate dehydrogenase activities and photosynthesis and respiration at 15, 20 and 25 °C, and pH 6.5, 8.2 and 9.2. Our results indicate that these physiological characteristics are not responsible for the scarcity of gametophytes in the field populations of G. canariensis.Abbreviations ALP = Alkaline phosphatase - G6PDH = glucose-6-phosphate dehydrogenase - DIA = NADH-Diaphorase - TRIS = Tris[hydroxymethyl]-aminomethane - PVPP = Polyvinylpolypyrrolidone |
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| Keywords: | Calorific content enzyme activity gametophytes Gelidium canariensis photosynthesis respiration tetrasporophytes |
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