Focus on the middle sample in each image.
I have to say I’m convinced. I’m convinced that the root hairs are a real phenomenon of growing in ddw. All of the tobacco seed samples (havanna and virginia gold) growing in ddw have at least one or two seeds that have root hairs. ALL. The DI and the tap water samples are barely growing hairs. There is a clear difference between these hairs and the DDW samples.
As for the arabidopsis. I don’t know. The only thing I’m noticing is that the stems are growing very crooked. So crooked that most of the seedlings have intertwined. This is tough to confirm because the DI sample barely sprouted, but the tap water sample appears to have longer persistance lengths (to borrow a word from DNA). By this I mean the angle of curvature is greater in the tap water than in all the ddw samples which tend to curve like no ones business.
I can confirm this by comparing to the previous batch of samples. The tap and di water samples had similarly longer curve radii, while the ddw (which had to start after) seeds got all tangled together.
What should I make of this?!?!?!?!?