J. H. Sietsma

• "Protoplast" formation and cell wall composition of some Oomycete species
• "Protoplasts" from Pythium sp. PRL 2142
• Further studies on sterol stimulation of sexual reproduction in Pythium
• The involvement of cellulase and laminaranase in the formation of Pythium protoplasts
• The purification of cellulose and exo-laminaranase and their role in the formation of Pythium sp. "protoplasts"