Question

Phenotypically tall plants can be obtained from genetically dwarf maize plants by application of ______.

Options

• Gibberellins

• Auxins

• Ethylene

• ABA

Answer 1

Phenotypically tall plants can be obtained from genetically dwarf maize plants by application of Gibberellins.

Explanation:

Exogenous application of gibberellins (GA₃) stimulates internodal elongation in genetically dwarf maize plants. This causes the plant to grow tall, despite the fact that its genes still indicate dwarfism. This is a classic experiment that demonstrates the function of this hormone.