
In a fully turgid cell
A. ${ψ}_{s}$ is negative and ${ψ}_{p}$ is positive
B. ${ψ}_{p}$ is negative and ${ψ}_ {s}$ is positive
C. Both ${ψ}_{p}$ and ${ψ}_{s}$ are positive
D. Both ${ψ}_{s}$ and ${ψ}_{s}$ are negative
Answer
473.7k+ views
Hint: Turgor pressure is the force within the cell that pushes the cell membrane against the cell wall. It is also defined as the pressure measured by a fluid called hydrostatic pressure and , measured at a particular point within itself when at equilibrium.
Complete answer:
Water potential is calculated by the sum of solute potential and pressure potential. The Solute potential is negative and pressure potential is positive. In a fully turgid cell, the solute potential is equal to pressure potential and consequently water potential is zero. Therefore, no water can go within a fully turgid cell.
${ψ}_{w}$= ${ψ}_{s} + {ψ}_{p}$ = 0
Here, ${ψ}_{w}$= water potential
${ψ}_{s}$= solute potential
${ψ}_{p}$= pressure potential
Additional Information: Significance of turgidity in plants are –
(1) It provides stability to a cell.
(2) Turgidity keeps the cell and its organelles fully distended, which is important for plants to live and grow normally.
(3) Turgor pressure helps in cell enlargement, consequently in stretching of the stems and keeping leaves erect and fully expanded.
(4) The turgid cells give mechanical support essential for the non-woody tissues.
(5) Loss of turgidity results in wilting of leaves and drooping of shoots.
(6) The opening and shutting of the stomata are regulated by the turgidity of the guard cells.
(7) Leaf movements of many plants are controlled by loss and gain of cell turgor.
(8) Due to turgor pressure, plumule and radicle force out from seeds at the time of seed germination.
So, the correct answers are, ‘${ψ}_{s}$ is negative and ${ψ}_{p}$ is positive’.
Note: Turgor pressure is actually pressure potential ${ψ}_{p}$. The pressure potential during a plant cell is typically positive. Solute potential ${ψ}_{s}$, also called osmotic potential, is negative in a plant cell and zero in distilled water.
Complete answer:
Water potential is calculated by the sum of solute potential and pressure potential. The Solute potential is negative and pressure potential is positive. In a fully turgid cell, the solute potential is equal to pressure potential and consequently water potential is zero. Therefore, no water can go within a fully turgid cell.
${ψ}_{w}$= ${ψ}_{s} + {ψ}_{p}$ = 0
Here, ${ψ}_{w}$= water potential
${ψ}_{s}$= solute potential
${ψ}_{p}$= pressure potential
Additional Information: Significance of turgidity in plants are –
(1) It provides stability to a cell.
(2) Turgidity keeps the cell and its organelles fully distended, which is important for plants to live and grow normally.
(3) Turgor pressure helps in cell enlargement, consequently in stretching of the stems and keeping leaves erect and fully expanded.
(4) The turgid cells give mechanical support essential for the non-woody tissues.
(5) Loss of turgidity results in wilting of leaves and drooping of shoots.
(6) The opening and shutting of the stomata are regulated by the turgidity of the guard cells.
(7) Leaf movements of many plants are controlled by loss and gain of cell turgor.
(8) Due to turgor pressure, plumule and radicle force out from seeds at the time of seed germination.
So, the correct answers are, ‘${ψ}_{s}$ is negative and ${ψ}_{p}$ is positive’.
Note: Turgor pressure is actually pressure potential ${ψ}_{p}$. The pressure potential during a plant cell is typically positive. Solute potential ${ψ}_{s}$, also called osmotic potential, is negative in a plant cell and zero in distilled water.
Recently Updated Pages
Master Class 11 Accountancy: Engaging Questions & Answers for Success

Glucose when reduced with HI and red Phosphorus gives class 11 chemistry CBSE

The highest possible oxidation states of Uranium and class 11 chemistry CBSE

Find the value of x if the mode of the following data class 11 maths CBSE

Which of the following can be used in the Friedel Crafts class 11 chemistry CBSE

A sphere of mass 40 kg is attracted by a second sphere class 11 physics CBSE

Trending doubts
10 examples of friction in our daily life

One Metric ton is equal to kg A 10000 B 1000 C 100 class 11 physics CBSE

Difference Between Prokaryotic Cells and Eukaryotic Cells

State and prove Bernoullis theorem class 11 physics CBSE

What organs are located on the left side of your body class 11 biology CBSE

The combining capacity of an element is known as i class 11 chemistry CBSE
