PGR causing the closure of stomata in response to water stress is:

1. ABA 2. Gibberellins
3. Auxin 4. Cytokinin
Subtopic:  Abscisic Acid |
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In most situations, ABA acts as an antagonist to:

1. Auxins 2. GAs
3. Ethylene 4. Cytokinins
Subtopic:  Abscisic Acid |
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Match the following concerning the activity/function and the phytohormone involved:-

(a) Fruit ripener (i) Abscisic acid
(b) Herbicide (ii) GA 3
(c) Bolting agent (iii) 2, 4-D
(d) Stress hormone (iv) Ethephon

Select the correct option from following:-

(a) (b) (c) (d)
1. (ii) (iii) (iv) (i)
2. (iii) (iv) (ii) (i)
3. (iv) (iii) (ii) (i)
4. (iv) (ii) (i) (iii)
Subtopic:  Growth Hormones & Auxin | Gibberellin | Ethylene | Abscisic Acid |
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Identify the plant growth regulator that is not correctly matched to its chemical nature in the following given options:

 

PGR

Chemical nature

1.

Ethylene

Gaseous

2.

Adenine derivatives

Kinetin

3.

Indole compounds

Auxins

4.

Terpenes

Abscisic acid

Subtopic:  Abscisic Acid |
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