OÖSPORE GERMINATION IN ALBUGO CANDIDA

Abstract
In addition to the well-known sessile vesicular zoosporangial type of oöspore germination in Albugo candida (Lév.) Kuntze, a second type is described. This consists of an exit tube one to two and a half times the length of the diameter of the oöspore and about one quarter of its width, at the end of which the vesicular zoosporangium is produced. Best results were secured by soaking the oöspores for 7 to 10 days in water at 10° to 12 °C and then changing to fresh water. The oöspore material came from hypertrophied inflorescences of rape (Brassica napus L. var. annua Koch).