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  4. 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

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Q. 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

NTA AbhyasNTA Abhyas 2020Plant Growth and Development

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.