Tsütokininsed

Tsütokininsed is a term used in plant biology to refer to a class of plant hormones, also known as cytokinins. These are a group of naturally occurring plant growth substances that play a crucial role in various developmental processes. The primary function of cytokinins is to promote cell division and differentiation. They are synthesized mainly in the root tips and are transported upwards to the shoots.

Along with auxins, another major class of plant hormones, cytokinins regulate the balance of growth and development in plants. The ratio of auxins to cytokinins is particularly important in determining the fate of plant cells, influencing whether they develop into roots, shoots, or callus. Cytokinins are also involved in delaying senescence, which is the aging process in plant tissues, thereby extending the lifespan of leaves and flowers.

Furthermore, cytokinins can influence nutrient mobilization, helping to direct resources within the plant. They are also implicated in responses to environmental stresses, such as drought and salinity. Their presence and activity are essential for healthy plant growth and development, from the initial stages of germination to the formation of reproductive structures. The study of cytokinins has significant implications for agriculture and horticulture, offering potential avenues for improving crop yields and plant resilience.