NTA Abhyas NEET2020BotanyTransport in PlantsPractice
What will be the effect of the accumulation of K + ions in guard cells?
Options
- AWater potential increases
- BWater potential decreases
- CLoss of turgidity
- DSolute potential increases
Correct answer
B. Water potential decreases
Step-by-step solution
When the amount of solutes increases, osmotic potential decreases, and total water potential decreases. Opening and closure of the stomatal pore are mediated by changes in the turgor pressure of the two guard cells. The turgor pressure of guard cells is controlled by movements of large quantities of ions and sugars into and out of it. Guard cells have cell walls of varying thickness and differently oriented cellulose microfibers, causing them to bend outward when they are turgid, which in turn, causes stomata to op