Added a moist piece paper of inside a small jar of pollen. Pollen being hydrophilic, started to sprout in about 60 hours. Here is photo taken at after 90 hours of exposure to moisture.
I'm pretty sure those are pollen tubes, not fungal growth.
I don't understand what the goal is here? Are you trying to make the pollen viable? I thought that wet pollen is not viable. Mabey I am missing something.
I don't mean to be captain obvious but pollen doesn't work when it gets wet. That's how you can render it useless. To me what you are "creating" is simply fungus.
You do you though