RT Conference Proceedings
T1 Metabolic channelingof phe for lignin biosynthesis in maritime pine
A1 El-Azaz-Ciudad, Jorge
A1 De-la-Torre-Fazio, Fernando Nicolás
A1 Pascual-Moreno, María Belén
A1 Ávila-Sáez, Concepción
A1 Cánovas-Ramos, Francisco Miguel
K1 Coníferas - Congresos
AB METABOLIC CHANNELING OF PHE FOR LIGNINBIOSYNTHESIS IN MARITIME PINEJorge El-Azaz, Fernando de la Torre, Belén Pascual,Concepción Ávila and Francisco M. CánovasDepartamento de Biología Molecular y Bioquímica, Universidad de Málaga.Málaga, SpainEmail: jelazaz@alu.uma.esThe amino acid phenylalanine (Phe) is the main precursor ofphenylpropanoids biosynthesis in plants. This vast family of Phederivedcompounds can represent up to 30% of capturedphotosynthetic carbon, playing essential roles in plants such as cellwall components, defense molecules, pigments and flavors. Inaddition to its physiological importance, phenylpropanoids andparticularly lignin, a component of wood, are targets in plantbiotechnology.The arogenate pathway has been proposed as the main pathway forPhe biosynthesis in plants (Maeda et al., 2010). The final step in Phebiosynthesis, catalyzed by the enzyme arogenate dehydratase (ADT),has been considered as a key regulatory point in Phe biosynthesis,due to its key branch position in the pathway, the multipleisoenzymes identified in plants and the existence of a feedbackinhibition mechanism by Phe. So far, the regulatory mechanismsunderlying ADT genes expression have been poorly characterized,although a strong regulation of the Phe metabolic flux should beexpected depending on its alternative use for protein biosynthesisversus phenylpropanoid biosynthesis. This second fate involves amassive carbon flux compared to the first one.In this study we report our current research activities in thetranscriptional regulation of ADT genes by MYB transcription factorsin the conifer Pinus pinaster (maritime pine). The conifers channelsmassive amounts of photosynthetic carbon for phenylpropanoidbiosynthesis during wood formation. We have identified thecomplete ADT gene family in maritime pine (El-Azaz et al., 2016)and a set of ADT isoforms specifically related with the lignificationprocess. The potential control of transcription factors previouslyreported as key regulators in pine wood formation (Craven-Bartle etal., 2013) will be presented.Maeda et al. (2010) Plant Cell 22: 832-849.El-Azaz et al. (2016) The Plant Jounal. Accepted article, doi:10.1111/tpj.13195Craven-Bartle et al. (2013). The Plant Journal 74(5):755-766
YR 2016
FD 2016-09-02
LK http://hdl.handle.net/10630/11934
UL http://hdl.handle.net/10630/11934
LA eng
NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 21 ene 2026