CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Photosynthesis- Introduction

ABA causes te...

Question

ABA causes temporary closure of stomata when there is a shortage of water because it

A

Delays cell division and cell elongation

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

B

Interferes with the transport of $K^{+}$ ions into the guard cells

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

C

Causes rapid abscission of leaves and flowers.

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

D

It stops mitosis in vascular cambium during winter season.

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

Open in App

Solution

The correct option is B
Interferes with the transport of $K^{+}$ ions into the guard cells

ABA changes permeability of guard cell's membrane.

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

H^{+} - K^{+}

exchange pump mechanism of stomatal movement
I.

K^{+}

ions accumulate in guard cells during the day.
II.

H^{+}

ions are pumped out from guard cells and

K^{+}

ions are pumped into guard cells.
III. Water potential of guard cells decreases with the accumulation of

K^{+}

ions together with

C l^{-}

and organic acid ions.
IV. Water enters into guard cells from epidermal and mesophyll cells due to decreased water potential of guard cells.

Q. Plant hormone causing abscission of leaves, senescence, bud dormancy and inhibition of cell division is

Q. What causes the opening and closing of guard cells of stomata during transpiration?

Q. Assertion :Application of cytokinins causes the opening of stomata. Reason: Cytokinins induce the influx of potassium ions into guard cells.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Introduction

BIOLOGY

Watch in App

explore_more_icon

Explore more

Photosynthesis- Introduction

Standard XII Biology

Join BYJU'S Learning Program

CrossIcon