Plant Growth Regulators Functions — NEET Biology
📚 Practice ConceptWhich one of the plant growth regulators would you use if you are asked to: (a) induce rooting in a twig (b) quickly ripen a fruit (c) delay leaf senescence (d) induce growth in axillary buds (e) 'bolt' a rosette plant (f) induce immediate stomatal closure in leaves.
Consider the following statements regarding plant growth regulators (PGRs): 1. Gibberellins can delay senescence in fruits (like apples) and also induce bolting in rosette plants such as cabbage. 2. Auxins such as 2,4-D are widely used to kill monocot weeds in lawns while sparing dicot plants. 3. Cytokinins help overcome apical dominance and promote chloroplast formation in leaves. 4. Ethylene promotes root hair formation and induces flowering in pineapples and mango. 5. Abscisic acid (ABA) stimulates stomatal closure, helps seeds withstand desiccation, and acts antagonistically to gibberellins. Which of the above statements are correct ?
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