Effects of nutrients on growth and development of embryos of Fucus edentatus Pyl. (Phaeophyceae, Fucales)

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Abstract
Growth of embryos of Fucus edentatus varied with the amount of nitrogen, phosphorus, and iron added to sea-water. Rapid growth occurred with relatively low concentrations of these elements, and an added N: P ratio of 30: 1 did not retard development. Omission of added silicon did not affect growth, even though germanium was previously reported toxic. Growth and development in a synthetic medium was comparable to that in enriched seawater provided bromine was added to the latter. Boron was also found to be essential, and a deficiency resulted in moribund embryos during the four-week period of incubation.

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