First slide

Tissue Culture

Question

When the explants are cultured ‘organogenesis’ takes place in the presence of:

Easy

A

Different combinations of Gibberellin and Cytokinin
B

Different combinations of Ethylene and Cytokinin
C

Different combinations of Auxin and Cytokinin
D

Different combinations of Ethylene and Abscisic acid

Solution

When the explants are cultured in the presence of different combinations of auxins or cytokinins, they produce roots or shoots – this is called ‘organogenesis’. High proportion of auxin and low proportion of cytokinin induce root development from callus and is called rhizogenesis. Low proportion of auxin and high proportion of cytokinin in the medium induce shoot development from the callus and is called caulogenesis.

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