What is the optimal Phosphorus proportion in the substrate for propagation of Arbuscular Mycorrhizal Fungi in ex-vitro pot cultures?

I read articles where peat moss is is used in the proportion of 8:1:1 to sand and vermiculite, and I wonder whether the relatively high P concentration in the peat will hinder the AMF to propagate...

12 October 2017 8,944 3 View