Chapter 7 Interactions between saprotrophic fungi


WOODWARD S., Boddy L.

British Mycological Society Symposia Series, cilt.28, sa.C, ss.125-141, 2008 (Scopus) identifier identifier

Özet

Fungal competition for resources can be divided into primary and secondary resource capture. With the former resources have not already been colonized, unlike the latter where combat and antagonistic mechanisms are used to obtain and defend territory. Such interactions can be mediated: (1) at a distance; (2) following contact at the hyphal level; or (3) following contact at the mycelial level. Antagonisms at a distance and at the mycelial level are effected by volatile and diffusible chemicals including enzymes, toxins and other antifungal metabolites. At the hyphal level antagonism is via hyphal interference or parasitism, which again is chemically or enzymatically mediated but on a more localized scale. Interactions have largely been studied on artificial media with the attendant problems of interpretation because of large divergence from field conditions, although soil microcosms have provided a valuable tool for interactions between cord-forming fungi; interactions have also been investigated by inoculating pairs of saprotrophs directly into wood in the field. Microcosm and field-based knowledge of interactions is crucial, not least because of the role of interactions in ecosystem functioning, particularly nutrient cycling and release, their effects on decomposition rates and potential as biological control agents. © 2008 Elsevier Ltd. All rights reserved.