title: Redox regulation in shoot growth, SAM maintenance and flowering.
abstract: Reactive oxygen species (ROS) and associated reduction/oxidation (redox) controls involving glutathione, glutaredoxins and thioredoxins play key roles in the regulation of plant growth and development. While many questions remain concerning redox functions in the shoot apical meristem (SAM), accumulating evidence suggests that redox master switches integrate major hormone signals and transcriptional networks in the SAM, and so regulate organ growth, polarity and floral development. Auxin-induced activation of plasma-membrane located NADPH-oxidases and mitochondrial respiratory bioenergetics are likely regulators of the ROS bursts that drive the cell cycle in proliferating regions, with other hormones such as jasmonic acid playing propagating or antagonistic roles in gene regulation. Moreover, the activation of oxygen production by photosynthesis and oxygen-dependent N-end rule controls are linked to the transition from cell proliferation to cell expansion and differentiation. While much remains to be understood, the nexus of available redox controls provides a key underpinning mechanism linking hormonal controls, energy metabolism and bioenergetics to plant growth and development.
authors.affiliation: Institute of Biology I, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany. Electronic address: schippers@bio1.rwth-aachen.de.
authors.forename: Jos Hm
authors.initials: JH
authors.lastname: Schippers
authors.affiliation: Centre for Plant Sciences, Faculty of Biology, University of Leeds, Leeds LS2 9JT, UK.
authors.forename: Christine H
authors.initials: CH
authors.lastname: Foyer
authors.affiliation: Institute of Biology I, RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany.
authors.forename: Joost T
authors.initials: JT
authors.lastname: van Dongen
mesh_terms: D002453:Cell Cycle; D035264:Flowers / Q000254:growth & development* / Q000378:metabolism; D053263:Gene Regulatory Networks; D005978:Glutathione / Q000378:metabolism; D018519:Meristem / Q000254:growth & development / Q000378:metabolism; D010084:Oxidation-Reduction; D063245:Plant Development / Q000235:genetics; D010937:Plant Growth Regulators / Q000378:metabolism; D018520:Plant Shoots / Q000254:growth & development* / Q000378:metabolism; D017382:Reactive Oxygen Species / Q000378:metabolism; D013879:Thioredoxins / Q000378:metabolism
chemical_list: D010937:Plant Growth Regulators; D017382:Reactive Oxygen Species; D013879:Thioredoxins; D005978:Glutathione