[Cytokinins and photosynthesis].
Almost six decades of studies explained many aspects of cytokinin complex metabolism, such as, biogenesis, degradation, signal perception and interaction with other phytohormones (mainly with auxins). A dual character of cytokinins' action on the nuclear genes (activation and repression) has been explained by recognition of the two types on nuclear receptors, which ensure a precise mechanism of self-control. Cytokinins promote the process of photosynthesis at different levels of plant- and cellular organization (development of leaves and plastids, influence on the photosynthetic proteins, activation of photosynthetic genes, etc.). An anti-senescing action of these hormones has been recently attributed to the activation of intra-cellular invertase, which suppress floem loading and change the sink-source pattern of the leaf.
Maria
M
Pilarska
Ernest
E
Skowron
Ewa
E
Niewiadomska
D003583:Cytokinins / Q000378:metabolism*; D010788:Photosynthesis / Q000502:physiology*; D063245:Plant Development / Q000502:physiology*; D010937:Plant Growth Regulators / Q000378:metabolism; D018515:Plant Leaves / Q000378:metabolism; D043324:beta-Fructofuranosidase / Q000378:metabolism
D003583:Cytokinins; D010937:Plant Growth Regulators; D043324:beta-Fructofuranosidase