A specific plant growth regulator is known to promote nutrient mobilisation and delay leaf senescence. Consider the following statements regarding this regulator: (A) It helps to overcome apical dominance. (B) It is synthesised in regions where rapid cell division occurs. (C) It promotes bolting in rosette plants. (D) It induces parthenocarpy in tomatoes. How many of the above statements are correct?

Step-by-step solution

The plant growth regulator that promotes nutrient mobilisation and delays leaf senescence is Cytokinin. Statement (A) is correct: Cytokinins help to overcome apical dominance. Statement (B) is correct: Natural cytokinins are synthesised in regions where rapid cell division occurs, such as root apices, developing shoot buds, and young fruits. Statement (C) is incorrect: Gibberellins, not cytokinins, promote bolting (internode elongation just prior to flowering) in rosette plants like beet and cabbages. Statement (D)