PUB - Publikationen an der Universität Bielefeld

The biological activities of mycorradicin, the major component of the yellow pigment formed in maize and other grasses upon colonization by arbuscular mycorrhizal fungi, and corticrocin from the ectomycorrhizal fungus Piloderma croceum were analysed in cell cultures of tobacco (Nicotiana tabacum L.) and alfalfa (Medicago sativa L.). Tobacco and alfalfa suspension cell cultures react to elicitor treatment by alkalinization of the culture medium and generation of activated oxygen species, the so-called oxidative burst. In the present study, the addition of corticrocin suppressed the elicitor-induced oxidative burst reaction but not the alkalinization. The suppression of the oxidative burst by corticrocin was dose dependent. Mycorradicin in either its methylated or free form had no effect on the oxidative burst or the alkalinization.