Question

What is the role of boron in pollen tube growth?

Options

• It provides structural support to the pollen grain wall

• It aids in the division of the generative cell

• It is secreted by stigma tissues and is essential for tube elongation

• It prevents incompatibility reactions

Answer 1

Boron is secreted by stigma tissues and plays an essential role in promoting pollen tube elongation. Its presence is critical for normal tube growth, and deficiency in boron can significantly impair or prevent pollen tube development, potentially affecting fertility.