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Molecular mechanisms controlling cytokinin homeostasis in the endoplasmic reticulum |
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Werner T[a], Niemann MCE [b], Guo T [b], Leonte G [b], Weber H [b], Bartrina I [a] |
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[a] Institute of Biology / Plant Sciences, University of Graz, Schubertstraße 51, 8010 Graz, Austria
[b] Institute of Biology/Applied Genetics, Dahlem Centre of Plant Sciences (DCPS), Freie Universität Berlin, Albrecht-Thaer-Weg 6, D-14195 Berlin, Germany
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Cytokinin is a plant hormone regulating numerous physiological and developmental processes. It is a key morphogenic factor controlling cell division and differentiation, and thereby the activity of plant meristems and organ growth. To govern accurately these different processes, the cellular concentration of cytokinin must be precisely regulated, for instance through the metabolic inactivation mediated by cytokinin oxidase/dehydrogenase (CKX) proteins. This talk presents examples of novel molecular mechanisms involved in regulating cytokinin homeostasis and plant development, including protein quality control in the endoplasmic reticulum (ER) and recently identified a group of proteins with a putative activity during protein retrotranslocation from the ER and ER-associated degradation. |
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