A Contribution to the Biology of Nitella hookeri A. Br. in the Rotorua Lakes, New Zealand II. Organic nutrients and physical factors

The growth of Nitella hookeriA.Br. in non-axenic cultures, with or without soil extract, is not appreciably stimulated by the addition of vitamins, coenzymes and growth hormones. Vitamins B1, B6 and nicotinamide increased growth slightly but only at concentrations exceeding those found in the field. Kinetin inhibited growth at all concentrations.