دورية أكاديمية
أعرض في EDS

Oxidative pentose phosphate pathway-dependent sugar sensing as a mechanism for regulation of root ion transporters by photosynthesis.

التفاصيل البيبلوغرافية
العنوان: Oxidative pentose phosphate pathway-dependent sugar sensing as a mechanism for regulation of root ion transporters by photosynthesis.
المؤلفون: Lejay L; Institut de Biologie Intégrative des Plantes, UMR 5004, Biochimie et Physiologie Moléculaire des Plantes, Agro-M/CNRS/INRA/SupAgro/UM2, F-34060 Montpellier, France. lejay@supagro.inra.fr, Wirth J, Pervent M, Cross JM, Tillard P, Gojon A
المصدر: Plant physiology [Plant Physiol] 2008 Apr; Vol. 146 (4), pp. 2036-53. Date of Electronic Publication: 2008 Feb 27.
نوع المنشور: Journal Article; Research Support, Non-U.S. Gov't
اللغة: English
بيانات الدورية: Publisher: American Society of Plant Biologists Country of Publication: United States NLM ID: 0401224 Publication Model: Print-Electronic Cited Medium: Print ISSN: 0032-0889 (Print) Linking ISSN: 00320889 NLM ISO Abbreviation: Plant Physiol Subsets: MEDLINE
أسماء مطبوعة: Publication: : [Rockville, MD] : American Society of Plant Biologists
Original Publication: Lancaster, Pa., American Society of Plant Physiologists.
مواضيع طبية MeSH: Carbohydrate Metabolism* , Pentose Phosphate Pathway* , Photosynthesis*, Carrier Proteins/*metabolism , Plant Roots/*metabolism, Base Sequence ; Carrier Proteins/genetics ; DNA Primers ; Genes, Plant ; Ion Transport ; Light ; Oxidation-Reduction ; Phosphorylation ; Polymerase Chain Reaction
مستخلص: Root ion transport systems are regulated by light and/or sugars, but the signaling mechanisms are unknown. We showed previously that induction of the NRT2.1 NO(3)(-) transporter gene by sugars was dependent on carbon metabolism downstream hexokinase (HXK) in glycolysis. To gain further insights on this signaling pathway and to explore more systematically the mechanisms coordinating root nutrient uptake with photosynthesis, we studied the regulation of 19 light-/sugar-induced ion transporter genes. A combination of sugar, sugar analogs, light, and CO(2) treatments provided evidence that these genes are not regulated by a common mechanism and unraveled at least four different signaling pathways involved: regulation by light per se, by HXK-dependent sugar sensing, and by sugar sensing upstream or downstream HXK, respectively. More specific investigation of sugar-sensing downstream HXK, using NRT2.1 and NRT1.1 NO(3)(-) transporter genes as models, highlighted a correlation between expression of these genes and the concentration of glucose-6-P in the roots. Furthermore, the phosphogluconate dehydrogenase inhibitor 6-aminonicotinamide almost completely prevented induction of NRT2.1 and NRT1.1 by sucrose, indicating that glucose-6-P metabolization within the oxidative pentose phosphate pathway is required for generating the sugar signal. Out of the 19 genes investigated, most of those belonging to the NO(3)(-), NH(4)(+), and SO(4)(2-) transporter families were regulated like NRT2.1 and NRT1.1. These data suggest that a yet-unidentified oxidative pentose phosphate pathway-dependent sugar-sensing pathway governs the regulation of root nitrogen and sulfur acquisition by the carbon status of the plant to coordinate the availability of these three elements for amino acid synthesis.
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المشرفين على المادة: 0 (Carrier Proteins)
0 (DNA Primers)
تواريخ الأحداث: Date Created: 20080229 Date Completed: 20080805 Latest Revision: 20240316
رمز التحديث: 20240316
مُعرف محوري في PubMed: PMC2287369
DOI: 10.1104/pp.107.114710
PMID: 18305209
قاعدة البيانات: MEDLINE
الوصف
تدمد:0032-0889
DOI:10.1104/pp.107.114710