4 matokeo
Studies on the wide-host-range fungus Nectria haematococca MP VI have shown a linkage between virulence on pea and five of nine PDA genes that encode the ability to detoxify the pea phytoalexin, pisatin. Most of the PDA genes are on chromosomes of approximately 1.6 megabases (Mb) and two of these
The PDA1 gene of Nectria haematococca MP VI (anamorph: Fusarium solani) encodes pisatin demethylase. This enzyme detoxifies the isoflavanoid phytoalexin pisatin produced by the plant on which this fungus is pathogenic. Expression of pisatin demethylase activity is induced in a mycelium by
Many fungi that are pathogenic on pea have the ability to demethylate and thus detoxify the pea phytoalexin pisatin. This detoxification reaction has been studied most thoroughly in Nectria haematococca MP VI where it functions as a virulence trait. The enzyme catalyzing this reaction [pisatin
Some isolates of the plant-pathogenic fungus Nectria haematococca mating population (MP) VI metabolize maackiain and medicarpin, two antimicrobial compounds (phytoalexins) synthesized by chickpea (Cicer arietinum L.). The enzymatic modifications by the fungus convert the phytoalexins to less toxic