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Comparative photosynthetic studies of Ecklonia cava (Laminariales, Phaeophyta) bladelets with and without zoosporangial sori

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Abstract

Photosynthetic rates were compared between Ecklonia cava bladelets with and without zoosporangial sori sampled from the subtidal zone (about 5 m deep) in Nabeta Bay, Shimoda, Japan. Photosynthetic rates of bladelets were lower in the sorus portion than in the non-sorus portion on the basis of area, dry weight and chlorophyll a. Respiration rates were higher in the sorus portion than in the non-sorus portion on the basis of area and chlorophyll a, whereas they were almost the same on a dry weight basis. The differences were mainly due to a large difference in dry weight per unit bladelet area between the sorus and the non-sorus portion. Light compensation points were higher in the sorus portion than in the non-sorus portion.

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Aruga, Y., Toyoshima, M. & Yokohama, Y. Comparative photosynthetic studies of Ecklonia cava (Laminariales, Phaeophyta) bladelets with and without zoosporangial sori. Hydrobiologia 204, 473–477 (1990). https://doi.org/10.1007/BF00040273

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