cytokiniinit
Cytokininit, known in English as cytokinins, are a class of plant hormones that regulate cell division and various aspects of growth and development. They are adenine derivatives and include natural forms such as zeatin, isopentenyladenine (iP), and kinetin; active forms include trans-zeatin, cis-zeatin, iP, and dihydrozeatin.
Most cytokinins are synthesized in roots and, to a lesser extent, in shoots, by enzymes such as
Perception occurs via membrane-bound histidine kinase receptors (AHKs in many plants). The signal is transmitted through
Physiological roles include promotion of cell division, maintenance of shoot meristems, delay of senescence by preserving
Applications: in plant tissue culture, cytokinins are used to induce shoot formation from callus or explants;