Fire plays an important role in many forest systems. Following fire seedlings tend to see ECM fungi from the spore bank (Taylor + Bruns, 1999). We know that many fungal spores - such as Neurospora's - respond to heat as a signal to germinate. This allows them to reserve stored energy until the conditions are more likely to be conducive to them getting on a substrate. Inklings of this are seen in ECM studies though no one has tested this. We are currently testing this through bioassays of soils from Teakettle forest treated at temperatures similar to that seen at 5-10 cm depth in a typical Sierra forest fire.
Seedlings (pine and fir) in the growth chamber
Unknown fungus on pine roots at 70 deg treatment