By John L. Lockwood, Alexander B. Filonow (auth.), M. Alexander (eds.)
Advances in Microbial Ecology was once demonstrated by means of the foreign Commis sion on Microbial Ecology to supply a car for in-depth, severe, and, it really is was hoping, provocative studies on features of either utilized and simple microbial ecol ogy. within the 5 years of its life, Advances has accomplished popularity as an important resource of data and suggestion either for practising and f
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Filonow duced are favorable for vegetative development and fructification of the rapidly growing carbonicolous fungi, and the ash probably provides mineral nutrients. By contrast, alkaline conditions and ash are not well tolerated by competing fungi. It is likely, also, that heating the soil releases energy-yielding nutrients usable by the carbonicolous species. Among the carbonicolous Ascomycetes, differences have been demonstrated in activation temperatures and times (Zak and Wicklow, 1978b) and in growth rates (Wicklow and Hirschfield, 1979), and these differences have implications for competition.
These results are similar to those of Bristow and Lockwood (1975a) for conidia of C. sativus. C. lunata. and T. basicola and suggest that microbial competition for nutrients might be the causal mechanism for the foliar mycostasis (Sztejnberg and Blakeman, 1973). Mycostasis of B. cinerea conidia was closely related to microbial competition for amino acids. A common leaf saprophytic bacterium, Pseudomonas sp. isolate 14, competed very actively for amino acids in glucose-amino acid mixtures and removed 80% from solutions in 5 hr (Brodie and Blakeman, 1976).
Isolated cell walls of the wild type were resistant to enzymatic degradation, but walls of a melaninless mutant were not resistant. Moreover, increasing resistance to degradation as the wild-type culture aged was associated with increased melanin content. The relative resistance of three varieties of Gaeumannomyces graminis also was correlated with melanin content (Tschudi and Kern, 1979). Many persistant structures of fungi are characteristically dark, and their persistance may be related to melanin content.
Advances in Microbial Ecology by John L. Lockwood, Alexander B. Filonow (auth.), M. Alexander (eds.)