CameraIcon

SearchIcon

MyQuestionIcon

173

You visited us 173 times! Enjoying our articles? Unlock Full Access!

CAM Pathway

Levitt's expl...

Question

Levitt's explanation for stomatal action is due to

A

Increase in sugar content of guard cells.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

Decrease in pH value.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

Starch being converted into organic acids.

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

D

Light causes opening and darkness closure.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C Starch being converted into organic acids.
According to Levitt theory, during day time starch is converted to organic acids. This causes increase in proton concentration. These protons are exchanged for potassium ions from surrounding subsidiary cells. The influx of potassium ions leads to inflow of water into guard cells, which become turgid and stomata open.

Suggest Corrections

thumbs-up

0

Similar questions

Q. Stomatal movements are influenced by a number of environmental factors. Which of the following statements is/are incorrect regarding this?
(i) Blue light keeps stomata open during the day promoting the movement of

K^{+}

ions into guard cells.
(ii) Increased

C O_{2}

concentration reduces the pH of guard cells which promotes conversion of sugar into starch, ultimately causing closure of stomata.
(iii) Abscisic acid, under stress conditions, causes rapid movement of

K^{+}

ions into guard cells.
(iv) Highly concentrated sucrose or salt solution when applied over to stomata, results in stomatal opening.

Q. According to modern theory of stomatal opening, proposed by Levitt,

p H

of guard cell can rise due to

Q. In guard cells, when sugar is converted into starch, the stomatal pore

Q. Steward's theory of stomatal opening and closure assumes the pressure in the guard cells, of the following enzymes

Q. Assertion :Light is very important factor in transpiration. Reason: It induces stomatal opening and darkness closing. Therefore transpiration increases in light and decreases in dark.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Photorespiration

BIOLOGY

Watch in App

explore_more_icon

Explore more

Standard VIII Biology

Join BYJU'S Learning Program

CrossIcon