Transport-In-Plants Question 25
Question: The osmotic potential and pressure potential of three cells (A, B, C) located in different parts of an actively transpiring plant are given below.
Cell Osmotic Potential (MPa) Pressure Potential (MPa) A B C -0.87 -0.92 -0.68 0.44 0.34 0.27 Which of the cells (A, B, C) have the highest water potential?
Options:
A) A
B) B
C) C
D) All of these
Show Answer
Answer:
Correct Answer: C
Solution:
[c] Water potentials of the given cells are V = $ \psi ={\psi_{s}}+{\psi_{p}} $ A = -0.87 + 0.44 = -0.43 B = -0.92 + 0.34 = -0.58 C = -0.68 + 0.27 = -0.41 As water moves from greater water potential to less, root hair, root cortical and leaf mesophyll cells are C, A, B respectively.
BETA
