Apical Dominance

⬜⬜ Apical Dominance

👉 When shoot apex inhibit the growth of lateral bud so that plant may Grow Vertically

👉 It is important for the plant to devote energy to growing upward so that it can get more light to undergo photosynthesis. If the plant utilizes available energy for growing upward, it may be able to outcompete other individuals in the vicinity. Plants that were capable of outcompeting neighboring plants likely had higher fitness. Apical dominance is therefore most likely adaptive.

👉When the apical bud is removed, the lowered IAA concentration allows the lateral buds to grow and produce new shoots,

👉Auxins promote stem elongation, inhibit growth of lateral buds (maintains apical dominance). They are produced in the stem, buds, and root tips. ... This produces a curving of the plant stem tip toward the light, a plant movement known as phototropism. Auxin also plays a role in maintaining apical dominance.

👉since Auxin inhibit lateral bud formation So it is dominant for vertical plant Growth

👉So When shoot tip is removed then no auxin will flow so Horizontal Growth of plant Occurs .