In agricultural and horticultural practices, which of the following plant growth regulators is extensively used to initiate rooting in stem cuttings and induce parthenocarpy in tomatoes?

Step-by-step solution

Auxins are widely used in agricultural and horticultural practices. They help to initiate rooting in stem cuttings, an application widely used for plant propagation. Auxins also induce parthenocarpy, for example, in tomatoes. They are widely used as herbicides (like 2,4-D). Gibberellins are used to increase the length of grape stalks, elongate and improve the shape of apples, delay senescence, and speed up the malting process. Cytokinins help produce new leaves, chloroplasts in leaves, lateral shoot growth, and adv