title: Promotion of growth by elevated carbon dioxide is coordinated through a flexible transcriptional network in Arabidopsis.
abstract: Although gibberellins (GAs) promote many developmental responses in plants, little is known about how the hormone interacts with environmental signals at the molecular level for regulating plant growth. Recently, we have demonstrated that inhibition of growth by the GA biosynthesis inhibitor paclobutrazol (PAC) at ambient [CO₂] (350 µmol CO₂ mol(-1)) is reverted by elevated [CO₂] (750 μmol CO₂ mol(-1)). Our finding points to an important role of elevated [CO₂] as a signal allowing higher growth rates of low-GA plants. GA promotes plant growth via a complex transcriptional network that integrates multiple signaling pathways. Herein, we discuss how elevated [CO₂] stimulates biomass accumulation in a GA-independent manner by regulating the expression of growth-related genes.
authors: Departamento de Biologia Vegetal; Universidade Federal de Viçosa; Viçosa, MG Brasil.
authors: Dimas M
authors: DM
authors: Ribeiro
authors: Bernd
authors: B
authors: Mueller-Roeber
authors: Jos H M
authors: JH
authors: Schippers
mesh_terms: D017360:Arabidopsis / Q000187:drug effects / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism; D029681:Arabidopsis Proteins / Q000235:genetics / Q000378:metabolism; D018533:Biomass; D002245:Carbon Dioxide / Q000378:metabolism / Q000494:pharmacology*; D018506:Gene Expression Regulation, Plant; D053263:Gene Regulatory Networks; D017343:Genes, Plant; D005875:Gibberellins / Q000235:genetics / Q000378:metabolism*; D010937:Plant Growth Regulators / Q000235:genetics / Q000378:metabolism / Q000494:pharmacology; D015398:Signal Transduction; D014230:Triazoles / Q000494:pharmacology
chemical_list: D029681:Arabidopsis Proteins; D005875:Gibberellins; D010937:Plant Growth Regulators; D014230:Triazoles; D002245:Carbon Dioxide; C053370:paclobutrazol
keywords: elevated carbon dioxide concentration; gibberellin; growth; paclobutrazol; transcription factor