BIOMOLECULES AND ENZYMES

Detailed explanation-1: -The direct theory explains apical dominance as auxin synthesized in the shoot apex moves down the stem into buds and inhibits their growth. According to this theory, apically derived auxin inhibits buds from synthesizing their own auxin necessary for their growth.

Detailed explanation-2: -Apical dominance in plants refers to the condition where the apical bud is prominent hence keeping the central stem dominant. It doesn’t allow the proliferation of lateral buds. It is caused due to production of auxin in the apical bud.

Detailed explanation-3: -It is commonly accepted that the plant hormone auxin mediates apical dominance.

Detailed explanation-4: -A : Auxins promote apical dominance by suppressing the lateral growth of axillary buds.

Detailed explanation-5: -Apical dominance is suppressed under the effect of high cytokinin concentration and permits the development of axillary buds. If a number of side shoots or axillary shoots have been formed on the shoot tip then their inoculation may be done on the fresh medium containing cytokinin.