Waarnemingen over het gedrag van zoösporen uit de zoösporangia vanOlpidium brassicae (wor.) dang

Abstract

The zoosporangial zoospores ofOlpidium brassicae are uniflagellate (fig. 1). Observations with a phase contrast microscope on living zoospores in watermounts showed that biflagellate zoospores resulted from zoospore fusion. Further, specimens were found with more than two flagella (fig. 2 and 3). As at zoospore discharge only uniflagellate zoospores occur, it may be, assumed that zoospores with more than two flagella are also the result of zoospore fusion. As there may be an analogy betweenO. brassicae andO. viciae,Kusano's explanation of the occurrence of compound zoospores with more than two flagella is discussed.