RT Conference Proceedings
T1 NAC-MYB basedtranscriptional networkinvolved in the regulation of phenylalanine biosynthesis in P. pinaster
A1 Pascual-Moreno, María Belén
A1 Cañas-Pendón, Rafael Antonio
A1 Craven-Bartle, Blanca
A1 Cánovas-Ramos, Francisco Miguel
A1 Ávila-Sáez, Concepción
K1 Coníferas - Congresos
AB P2-2NAC-MYB-BASED TRANSCRIPCIONAL NETWORKINVOLVED IN THE REGULATION OF PHENYLALANINEBIOSYNTHESIS IN P. PINASTERMª Belén Pascual, Rafael A. Cañas, Blanca Craven-Bartle,Francisco M. Cánovas and Concepción ÁvilaDepartamento de Biología Molecular y Bioquímica. Facultad de Ciencias.Universidad de Málaga. Campus de teatinos s/n, Málaga, SpainEmail: cavila@uma.esConifer trees divert large quantities of carbon into the biosynthesis ofphenylpropanoids, particularly to generate lignin, an importantconstituent of wood. Since phenylalanine is the precursor forphenylpropanoid biosynthesis, the precise regulation ofphenylalanine synthesis and use should occur simultaneously. Thiscrucial pathway is finely regulated primarily at the transcriptionallevel. Transcriptome analyses indicate that the transcription factors(TFs) preferentially expressed during wood formation in plantsbelong to the MYB and NAC families. Craven-Bartle et al. (2013)have shown that Myb8 is a candidate regulator of key genes inphenylalanine biosynthesis involved in the supply of thephenylpropane carbon skeleton necessary for lignin biosynthesis.This TF is able to bind AC elements present in the promoter regionsof these genes to activate transcription. In Arabidopsis, thetranscriptional network controlling secondary cell wall involvesNAC-domain regulators operating upstream Myb transcriptionfactors. We have identified in the P. pinaster genome three NACproteins as potential candidates to be involved in vasculardevelopment. One of them, PpNAC1 is expressed both in xylem andcompression wood from adult trees and has been thoroughlycharacterized. Its role upstream the transcriptional networkinvolving Myb8 will be discussed. The understanding of thetranscriptional regulatory network associated to phenylpropanoidsand lignin biosynthesis in conifers is crucial for future applications intree improvement and sustainable forest management.
YR 2016
FD 2016-09-02
LK http://hdl.handle.net/10630/11936
UL http://hdl.handle.net/10630/11936
LA eng
NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026