Some Observations on the Influence of Salinity on Photosynthetic Activity and Chloride Ion Loss in Several Seaweeds
✍ Scribed by Dr. Masao Ohno
- Publisher
- John Wiley and Sons
- Year
- 1976
- Tongue
- English
- Weight
- 445 KB
- Volume
- 61
- Category
- Article
- ISSN
- 1434-2944
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✦ Synopsis
Abstract
The photosynthetic rates of Enteromorpha intestinalis, Fucus vesiculosus and Laminaria saccharina from the Baltic Sea were measured in different salinity range of Medium A (with NaHCO~3~) and Medium B (without NaHCO~3~). Photosynthetic activity in Medium A showed higher values than those in Medium B. The materials pretreated for one day showed a higher O~2~ output than those untreated at almost every salinity range. In a chloride loss experiment the pretreated thalli of Porphyra umbilicalis, Fucus vesiculosus and Laminaria digitata were placed for a three minute period in distilled water. The excreted chloride ion content showed a higher value in sublittoral species after hypotonic and hypertonic treatment than in intertidal species.