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  4. Cell division in plants is promoted by

Q. Cell division in plants is promoted by

 1997  218 AFMCAFMC 2012Plant Growth and Development Report Error

Solution:

Cytokinins (Gk, cytos-cell, kinesis-division) are mildly basic growth hormones that are usually amino purine derivatives and promote cell division in plants. Along with auxins, they are extensively used in tissue culture experiments where they promote differentiation of root and shoot. They have also been found to delay senescence, overcome apical dominance and promote cell expansion, etc. Roots are the main source of cytokinin synthesis, e.g., zeatin, ribosyl zeatin, dihydrozeatin, etc., are some naturally occurring cytokinins.