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NUTRITIONAL STUDIES OF THE EDIBLE SEAWEED PORPHYRA TENERA. II. NUTRITION OF CONCHOCELIS 1
Author(s) -
Iwasaki Hideo
Publication year - 1967
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/j.1529-8817.1967.tb04625.x
Subject(s) - tenera , biology , porphyra , nutrient , algae , urea , botany , manganese , food science , environmental chemistry , biochemistry , chemistry , ecology , organic chemistry , palm oil
SUMMARY The nutrition of the free‐living phase of Conchocelis of P. tenera was studied axenically. Conch‐ocelis preferred NO 3 , as nitrogen source. Urea and NH 4 in low concentration, asparagine, and lysine were very good N sources. Several other amino acids were also utilized but growth was less abundant. Inorganic and organic phosphates were utilized; they were required at relatively low concentrations. Glycerophosphate gave excellent growth in a comparatively wide range of concentrations (0.1‐5 mg P %). The optimal Ca concentration was 10‐100 mg %. Needs for boron, manganese, zinc, strontium, rubidium, lithium, and iodine were demonstrated. The iodine effect was remarkable (peak growth with 1 μ g %); the effective concentration range was very narrow. Iron, cobalt, and bromine seemed to be adequately supplied as impurities of the macro‐nutrients. A modified artificial medium (ASP 12 I) for the Conchocelis phase is presented.