Regulation of source/sink relations by cytokinins

Citation
T. Roitsch et R. Ehness, Regulation of source/sink relations by cytokinins, PLANT GR R, 32(2-3), 2000, pp. 359-367
Citations number
73
Categorie Soggetti
Plant Sciences
Journal title
PLANT GROWTH REGULATION
ISSN journal
01676903 → ACNP
Volume
32
Issue
2-3
Year of publication
2000
Pages
359 - 367
Database
ISI
SICI code
0167-6903(200011)32:2-3<359:ROSRBC>2.0.ZU;2-0
Abstract
Many physiological effects of cytokinins are well established and are known to be involved in various aspects of the plant life cycle. In contrast, li ttle is known about how these effects are evoked at the molecular level. Si nce cytokinins have been shown to play a major role in the regulation of va rious processes associated with active growth and thus an enhanced demand f or carbohydrates, a link to the regulation of assimilate partitioning has b een suggested. This review discusses the current knowledge of the role of c ytokinins in the regulation of source-sink relations, based on the finding of the co-ordinated cytokinin induction of an extracellular invertase and a hexose transporter. The induction of these key enzymes of an apoplastic un loading mechanism may be one important molecular prerequisite for different cytokinin-mediated effects.