Laboratory experiments on competition between two rhizoplane microfungiPenicillium chrysogenum andTrichoderma harzianum
A field study of rhizoplane microfungi associated with little bluestem (Schizachyrium scoparium (Michx.) Nash), a common tallgrass prairie species, had indicated thatPenicillium chrysogenum Thom andTrichoderma harzianum Rifai outcompeted each other in unfumigated and fumigated soils, respectively. To investigate the mechanisms of competition, interactions between the two fungi were studied in laboratory experiments using an artificial model system. Mutual suppression did occur. The first-inoculated fungus was less affected. Some detrimental residual effects on the growth of one species were observed when it was grown along with the killed mass of the other in the same medium.
KeywordsCompetition methyl bromide microfungi rhizoplane Penicillium Trichoderma
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