I'm working on Ipomoea batatas cell culture and trying to make a growth curve. For that, I take 1 ml of cell culture and dry it overnight in an 80 0C oven. After 3-4 days the dry weight starts to decrease and stays on the same level from 10 and 20th days. But I definitely see an increase in cells suspension density.
What can be the reason? Has someone met a similar problem?