Plant Growth Regulators
One hormone hastens maturity period in juvenile conifers, second hormone controls xylem differentiation, while the third hormone increases the tolerance of plants to various stresses. They are respectively
Gibberellin, Auxin, Ethylene
Auxin, Gibberellin, Cytokinin
- Gibberellin, Auxin, ABA
Auxin, Gibberellin, ABA.
- Auxins and cytokinins
- Gibberellins and ABA
- Ethylene and ABA
- All of these
- Formation of flowers in plants
- Formation of seeds in plants
- Response of plant towards a wound
- Pattern formation in plants
- Abscisic acid
- Indole acetic acid
Match the following columns.
A-3, B-4, C-1, D-2
A-2, B-1, C-4, D-3
A-4, B-1, C-2, D-3
A-3, B-1, C-4, D-2
- Plant growth regulators are also known as phytohormones.
- The regulators are signal molecules produced within the cell.
- They occur in extremely low concentrations.
- Phytohormones are required in high concentrations.
Match the following columns
(A)→(2), (B)→(5), (C)→(1), (D)→(3), (E)→(4)
(A)→(2), (B)→(3), (C)→(4), (D)→(5), (E)→(1)
(A)→(1), (B)→(5), (C)→(2), (D)→(4), (E)→(3)
(A)→(5), (B)→(4), (C)→(3), (D)→(2), (E)→(1)
(A)→(3), (B)→(2), (C)→(1), (D)→(5), (E)→(4)
Diverse class of organic compounds Plant growth regulators
|1) Indole compounds||i) Abscisic acid|
|2) Derivatives of carotenoids||ii) Ethylene|
|3) Terpenes||iii) IAA|
|4) Gases||iv) Gibberellic acid|
- 1-iii, 2-i, 3-iv, 4-ii
- 1-ii, 2-i, 3-iv, 4-iii
- 1-i, 2-iii, 3-iv, 4-ii
- 1-iii, 2-i, 3-ii, 4-iv
Woulda defoliated plant respond to photoperiodic cycle? Why?
List five main groups of natural plant growth regulators. Write a note on discovery, physiological functions and agricultural/horticultural applications of any one of them.