Question

A generative cell wall was destroyed by laser but later a normal pollen tube still formed. This probably occured because -

• A. Vegetative cell was not damaged
• B. Contents of killed generative cell stimulate pollen growth
• C. Laser beam stimulates growth of pollen tube
• D. The region of emergence of pollen tube is not harmed

Answer 1

The correct option is A Vegetative cell was not damaged

In the scenario given, a generative cell wall was destroyed by laser but a normal pollen tube still formed as the vegetative cell was not damaged. Each microspore divides by mitotic division making a smaller generation cell and a larger vegetative cell or tube cell. If the generative cell was damaged then a normal pollen tube will still form because it is formed by the vegetative cell not by the generative cell.