Mitochondrial Haplotype Influences Mycelial Growth of Agaricus bisporus Heterokaryons.

Applied and Environmental Microbiology
Paul Y de la BastideP A Horgen

Abstract

We evaluated the influence of mitochondrial haplotype on growth of the common button mushroom Agaricus bisporus. Ten pairs of heterokaryon strains, each pair having the same nuclear genome but different mitochondrial genomes, were produced by controlled crosses among a group of homokaryons of both wild and commercial origins. Seven genetically distinct mitochondrial DNA (mtDNA) haplotypes were evaluated in different nuclear backgrounds. The growth of heterokaryon pairs differing only in their mtDNA haplotypes was compared by measuring mycelial radial growth rate on solid complete yeast medium (CYM) and compost extract medium and by measuring mycelial dry weight accumulation in liquid CYM. All A. bisporus strains were incubated at temperatures similar to those utilized in commercial production facilities (18, 22, and 26(deg)C). Statistically significant differences were detected in 8 of the 10 heterokaryon pairs evaluated for one or two of the three growth parameters measured. Some heterokaryon pairs showed differences in a single growth parameter at all three temperatures of incubation, suggesting a temperature-independent difference. Others showed differences at only a single temperature, suggesting a temperature-dependent dif...Continue Reading

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Citations

May 21, 2009·Applied Microbiology and Biotechnology·Marie Foulongne-OriolJean-Michel Savoie
Feb 7, 2006·Comparative Biochemistry and Physiology. Part B, Biochemistry & Molecular Biology·K H BrownG H Thorgaard

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