NEETBotanyPlant - Growth and Development
Match List-I with List-II regarding the physiological effects of plant growth regulators. List-I List-II (A) Ethylene (I) Bolting in beet and cabbages (B) Gibberellin (II) Internode elongation in deep water rice (C) Auxin (III) Delay of leaf senescence (D) Cytokinin (IV) Apical dominance Choose the correct answer from the options given below:
Options
- A(A)-(I), (B)-(II), (C)-(IV), (D)-(III)
- B(A)-(II), (B)-(I), (C)-(III), (D)-(IV)
- C(A)-(II), (B)-(I), (C)-(IV), (D)-(III)
- D(A)-(I), (B)-(IV), (C)-(II), (D)-(III)
Correct answer
C. (A)-(II), (B)-(I), (C)-(IV), (D)-(III)
Step-by-step solution
Ethylene promotes rapid internode/petiole elongation in deep water rice plants, helping the upper parts of the shoot to remain above water. Thus, (A) matches with (II). Gibberellins promote bolting (internode elongation just prior to flowering) in beet, cabbages and many plants with rosette habit. Thus, (B) matches with (I). Auxins in higher plants promote apical dominance, where the growing apical bud inhibits the growth of lateral buds. Thus, (C) matches with (IV). Cytokinins help in the delay of leaf senescence