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1 year ago in Biology , Mycology By Mairah Shah
Why might some basidiomycete fungi fail to grow on malt medium?
In my mycology lab, we routinely use malt extract agar (MEA) for isolation. However, we occasionally encounter recalcitrant basidiomycetes, particularly from environmental samples, that simply won't establish. I'm trying to troubleshoot our protocols and understand the biological constraints behind these failures.
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By Admin@gmail.com Answered 2 years ago
From my experience isolating wood-decay fungi, this is common. Malt extract agar is often too nutrient-rich and simple. Many basidiomycetes are obligate symbionts or wood-degraders requiring complex lignocellulose; MEA lacks those specific polymers. Others need signaling compounds from a host. I would recommend supplementing MEA with wood powder, or switching to a more nutrient-poor medium like potato dextrose agar or a specific basidiomycete medium to slow growth and reduce bacterial competition.
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