title: The poplar MYB transcription factors, PtrMYB3 and PtrMYB20, are involved in the regulation of secondary wall biosynthesis.
abstract: Dicot wood is mainly composed of cellulose, xylan and lignin, and its formation requires the coordinated regulation of their biosynthesis. In this report, we demonstrate that the poplar wood-associated MYB transcriptional activators, PtrMYB3 and PtrMYB20, activate the biosynthetic pathways of cellulose, xylan and lignin when overexpressed in Arabidopsis and they are also able to activate the promoter activities of poplar wood biosynthetic genes. We also show that PtrMYB3 and PtrMYB20 are functional orthologs of Arabidopsis MYB46 and MYB83, and their expression is directly activated by poplar PtrWND2, suggesting their involvement in the regulation of wood formation in poplar.
authors.affiliation: Department of Plant Biology, University of Georgia, Athens, GA 30602, USA.
authors.forename: Ryan L
authors.initials: RL
authors.lastname: McCarthy
authors.forename: Ruiqin
authors.initials: R
authors.lastname: Zhong
authors.forename: Scott
authors.initials: S
authors.lastname: Fowler
authors.forename: David
authors.initials: D
authors.lastname: Lyskowski
authors.forename: Hasanthi
authors.initials: H
authors.lastname: Piyasena
authors.forename: Kara
authors.initials: K
authors.lastname: Carleton
authors.forename: Charles
authors.initials: C
authors.lastname: Spicer
authors.forename: Zheng-Hua
authors.initials: ZH
authors.lastname: Ye
mesh_terms: D017360:Arabidopsis / Q000235:genetics / Q000378:metabolism; D002473:Cell Wall / Q000378:metabolism*; D002482:Cellulose / Q000096:biosynthesis*; D018506:Gene Expression Regulation, Plant; D020570:Genes, myb; D010802:Phylogeny; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism*; D030821:Plants, Genetically Modified / Q000235:genetics / Q000378:metabolism; D032107:Populus / Q000235:genetics* / Q000378:metabolism; D011401:Promoter Regions, Genetic; D018749:RNA, Plant / Q000235:genetics; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism*; D014934:Wood / Q000235:genetics / Q000254:growth & development
chemical_list: D010940:Plant Proteins; D018749:RNA, Plant; D014157:Transcription Factors; D002482:Cellulose