This capability has been used to divide fungal pathogens into acidifying and/or alkalinizing
classes. Here, we show that diverse classes of fungal pathogens—Colletotrichum
gloeosporioides, Penicillium expansum, Aspergillus nidulans and Fusarium oxysporum—
secrete small pH‐affecting molecules. These molecules modify the environmental pH, which
dictates acidic or alkaline colonizing strategies, and induce the expression of PACC …