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Carbon Assimilation by Different Developmental Stages of Laminaria saccharina

Bruno P. Kremer and James W. Markham
Planta
Vol. 144, No. 5 (1978/79), pp. 497-501
Published by: Springer
Stable URL: http://www.jstor.org/stable/23373892
Page Count: 5
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Carbon Assimilation by Different Developmental Stages of Laminaria saccharina
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Abstract

Various stages of the life cycle of the marine brown alga Laminaria saccharina (L.) Lamour. (Laminariales, Phaeophyta) including male and female gametophytes, female gametes, zygotes and young sporophytes of different age were investigated for their potentials of carbon dioxide (14CO2) fixation. Rates of photosynthesis attain the same order of magnitude in all stages. Photosynthetic 14CO2-fixation is accompanied by a substantial light independent carbon assimilation. This is confirmed by rate determinations of the equivalent carboxylating enzymes present in the plants, ribulose-1,5-bisphosphate carboxylase (EC 4.1.1.39) and phosphoenolpyruvate carboxykinase (EC 4.1.1.32) as well as by chromatographic analyses of the appropriate [14C]-assimilate patterns.

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