L'effet d'acides gras saturés et insaturés sur la croissance et la fructification de quelques espèces du genre Ceratocystis

Abstract

The mycelial growth of Ceratocystis ips, C. capillifera, C. piceae, and C. ulmi is inhibited by capric acid, and the fungitoxic effect of saturated acids decreases with the length of even numbered carbon chains (C 12:00, C20:0). Palmitic acid does not interfere with glucose for mycelial growth. A competition for the utilization of carbon sources seems to occur when both glucose and linoleic or linolenic acid are present in the medium. In all cases, oleic, linoleic, and linolenic acids are good carbon sources and trigger the differentiation of several fruit bodies.