u/Extension-Ad5035

For my unknown, I added Iodine to my agar plate, and upon initial inspection I didn't see any aura or glow around the bacteria. (see pic 1) But after like 10 minutes I noticed a glow(pic 2). Would you consider this + or - for starch/Amylase?

I initially thought negative, but then I thought positive b/c of the aura around the single colony on Quadrant II. Or is that just the iodine evaporating? 🤣

Thanks.

img 1

img 2