Question

Why Osmotic pressure of a plant cell can never b zero but the DPD can b zero when it is fully turgid..what makes DPD zero and what can't make OP zero??

Answer 1

DPD = OP-TP in case of a fully turgid cell the TP=OP making DPD=0.
Moreover osmotic pressure can never be zero because whenever osmosis takes place some amount of osmotic pressure is always exerted so it can never be zero.