NEET2022BotanyPlant - Growth and DevelopmentActual
The gaseous plant growth regulator is used in plants to:
Options
- Apromote root growth and roothair formation to increase the absorption surface
- Bhelp overcome apical dominance
- Ckill dicotyledonous weeds in the fields
- Dspeed up the malting process
Correct answer
A. promote root growth and roothair formation to increase the absorption surface
Step-by-step solution
Ethylene is a gaseous plant growth regulator, synthesised by most ripening fruits and ageing tissues. Ethylene is used as both plant growth promoters and plant growth inhibitors. It is mainly used to stimulate the ripening of fruits. It also promotes root growth and root hair formation to increase the absorption surface. Cytokinin can overcome apical dominance caused by auxin. Synthetic auxin kill dicotyledonous weeds in the fields. Gibberellins are used to speed up the malting process in brewing industry.