NTA Abhyas NEET2020BotanyPlant - Growth and DevelopmentPractice
In tissue culture experiments of tobacco callus, it was seen that when the culture medium contains 2 ppm of IAA and 2 ppm of kinetin, an undifferentiated mass of callus is produced. If the ratio of kinetin to IAA is increased, then
Options
- AThe callus size would increase by repeated cell divisions
- BRoot initiation would take place
- CShoot initiation would occur
- DThe callus would die
Correct answer
C. Shoot initiation would occur
Step-by-step solution
Kinetin causes organogenesis in tissue culture. Kinetin is a type of cytokinin, a class of plant hormone that promotes cell division. Kinetin was originally isolated by Miller and Skoog et al. as a compound from autoclaved herring sperm DNA that had cell division-promoting activity.