Growth of lateral branches is promoted by

• A. Removal of axillary buds
• B. Auxin application over the decapitated apex
• C. Auxin application over apical bud
• D. Removal of apical bud

The growth of lateral branches in plants is influenced by the presence and distribution of hormones, particularly auxins. Among the options provided, the correct answer is:

Removal of Apical Bud

When the apical bud is removed, it reduces the concentration of auxins that inhibit the growth of lateral buds. This process is known as apical dominance. By eliminating the apical bud, lateral branches are allowed to grow more freely.

Why This Happens

• Apical Dominance: The apical bud produces auxins that suppress the growth of lateral buds.
• Hormonal Balance: Removing the apical bud shifts the hormonal balance, promoting lateral growth.
• Increased Light Exposure: With the apical bud gone, lateral branches may receive more light, further encouraging their growth.

In summary, the removal of the apical bud stimulates the growth of lateral branches by allowing them to grow without the inhibitory effects of auxins produced by the apical bud.