Question

Some plants grow in the marshy saline areas show a unique adaptive response. They accumulate $N{a}^{+}$ and $C{l}^{-}$ ions and transport them to the leaves. This phenomenon helps them to

(a) make ${\Psi }_w$ of leaves less negative
(b) reduce the transpirational loss of water
(c) increase the uptake of water via roots
(d) make the leaves more succulent

Select the correct option:-

• A. (a) and (c)
• B. (a) and (b)
• C. (b) and (c)
• D. (c) and (d)

Answer 1

The correct option is C (b) and (c)

If water potential becomes less negative, that is an increase in water potential, will eventually result in transpiration and loss of water for the plant. However active accumulation of ions will increase solute potential of the leaves, or make water potential more negative, preventing transpiration as well as increasing the uptake of water by roots So, the correct answer is '(b) and (c)'