Which type of plant hormone promotes cell division particularly in young growing tissues?

Cytokinins are a class of plant hormones that play a crucial role in promoting cell division, especially in young and actively growing tissues. They are primarily produced in plant roots and then transported to other parts of the plant, where they stimulate cell division in the shoots and leaves. This process is vital for the growth and development of the plant, as it leads to the formation of new cells and tissues necessary for the plant to expand and thrive.

Gibberellins, while also involved in promoting growth, mainly affect processes like seed germination, stem elongation, and flowering rather than focusing specifically on cell division. Auxins are involved in various growth processes including cell elongation and the differentiation of cells, while ethylene is associated with the regulation of fruit ripening and floral senescence rather than cell division. Thus, the role of cytokinins as the primary hormone that stimulates cell division in young tissues clearly aligns with the given question.