NEETBotanyPlant - Growth and Development
Match List-I with List-II regarding the physiological effects of plant growth regulators. List-I (Phytohormone) List-II (Physiological effect) (A) Cytokinin (I) Promotes abscission of older leaves and flowers (B) Ethylene (II) Prevents fruit and leaf drop at early stages (C) Auxin (III) Stimulates closure of stomata (D) Abscisic acid (IV) Delays leaf senescence Choose the correct answer from the options given below:
Options
- A(A)-(IV), (B)-(I), (C)-(II), (D)-(III)
- B(A)-(II), (B)-(I), (C)-(IV), (D)-(III)
- C(A)-(IV), (B)-(III), (C)-(II), (D)-(I)
- D(A)-(II), (B)-(III), (C)-(I), (D)-(IV)
Correct answer
A. (A)-(IV), (B)-(I), (C)-(II), (D)-(III)
Step-by-step solution
(A) Cytokinins promote nutrient mobilisation which helps in the delay of leaf senescence. (B) Ethylene is highly effective in fruit ripening and promotes senescence and abscission of plant organs especially of leaves and flowers. (C) Auxins help to prevent fruit and leaf drop at early stages but promote the abscission of older mature leaves and fruits. (D) Abscisic acid (ABA) stimulates the closure of stomata and increases the tolerance of plants to various kinds of stresses. Incorrect options swap the functions of