Question

If the growing plant is decapitated, then

(a) its growth stops

(b) leaves become yellow and fall down

(c) axillary buds are inactivated

(d) axillary buds are activated.

Answer 1

If the growing plant is decapitated,

(d) axillary buds are activated

Decapitation of plants leads to the activation of axillary buds due to increase in cytokinin. Cytokinins(CK) are a class of plant growth substances that promote cell division, or cytokinesis, in plant roots and shoots. They are involved primarily in cell growth and differentiation, but also affect apical dominance,axillary bud growth, and leaf senescence.Folke Skoog discovered their effects using coconut milk in the 1940s at the University of Wisconsin–Madison.