PoplarV1, Main, Exploration, bibRecord, 001698

PtrWRKY19, a novel WRKY transcription factor, contributes to the regulation of pith secondary wall formation in Populus trichocarpa.

Identifieur interne : 001698 ( Main/Exploration ); précédent : 001697; suivant : 001699

PtrWRKY19, a novel WRKY transcription factor, contributes to the regulation of pith secondary wall formation in Populus trichocarpa.

Auteurs : Li Yang [République populaire de Chine] ; Xin Zhao [République populaire de Chine] ; Fan Yang [République populaire de Chine] ; Di Fan [République populaire de Chine] ; Yuanzhong Jiang [République populaire de Chine] ; Keming Luo [République populaire de Chine]

Source :

Scientific reports [ 2045-2322 ] ; 2016.

RBID : pubmed:26819184

Descripteurs français

KwdFr :
- Facteurs de transcription (génétique), Facteurs de transcription (métabolisme), Lignine (biosynthèse), Lignine (génétique), Paroi cellulaire (génétique), Paroi cellulaire (métabolisme), Populus (génétique), Populus (métabolisme), Protéines végétales (génétique), Protéines végétales (métabolisme), Régulation de l'expression des gènes végétaux (physiologie), Tiges de plante (génétique), Tiges de plante (métabolisme).
MESH :
- biosynthèse : Lignine.
- génétique : Facteurs de transcription, Lignine, Paroi cellulaire, Populus, Protéines végétales, Tiges de plante.
- métabolisme : Facteurs de transcription, Paroi cellulaire, Populus, Protéines végétales, Tiges de plante.
- physiologie : Régulation de l'expression des gènes végétaux.

English descriptors

KwdEn :
- Cell Wall (genetics), Cell Wall (metabolism), Gene Expression Regulation, Plant (physiology), Lignin (biosynthesis), Lignin (genetics), Plant Proteins (genetics), Plant Proteins (metabolism), Plant Stems (genetics), Plant Stems (metabolism), Populus (genetics), Populus (metabolism), Transcription Factors (genetics), Transcription Factors (metabolism).
MESH :
- chemical , biosynthesis : Lignin.
- genetics : Cell Wall, Lignin, Plant Proteins, Plant Stems, Populus, Transcription Factors.
- metabolism : Cell Wall, Plant Proteins, Plant Stems, Populus, Transcription Factors.
- physiology : Gene Expression Regulation, Plant.

Abstract

WRKY proteins are one of the largest transcription factor families in higher plants and play diverse roles in various biological processes. Previous studies have shown that some WRKY members act as negative regulators of secondary cell wall formation in pith parenchyma cells. However, the regulatory mechanism of pith secondary wall formation in tree species remains largely unknown. In this study, PtrWRKY19 encoding a homolog of Arabidopsis WRKY12 was isolated from Populus trichocarpa. PtrWRKY19 was expressed in all tissues tested, with highest expression in stems, especially in pith. PtrWRKY19 was located in the nucleus and functioned as a transcriptional repressor. Ectopic expression of PtrWRKY19 in an atwrky12 mutant successfully rescued the phenotype in pith cell walls caused by the defect of AtWRKY12, suggesting that PtrWRKY19 had conserved functions for homologous AtWRKY12. Overexpression of PtrWRKY19 in poplar plants led to a significant increase in the number of pith parenchyma cells. qRT-PCR analysis showed that lignin biosynthesis-related genes were repressed in transgenic plants. In transcient reporter assays, PtrWRKY19 was identified to repress transcription from the PtoC4H2 promoter containing the conserved W-box elements. These results indicated that PtrWRKY19 may function as a negative regulator of pith secondary wall formation in poplar.

DOI: 10.1038/srep18643
PubMed: 26819184
PubMed Central: PMC4730198

Affiliations:

République populaire de Chine

Links toward previous steps (curation, corpus...)

to stream Main, to step Corpus: 001950
to stream Main, to step Curation: 001950

Le document en format XML

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<term>Gene Expression Regulation, Plant (physiology)</term>
<term>Lignin (biosynthesis)</term>
<term>Lignin (genetics)</term>
<term>Plant Proteins (genetics)</term>
<term>Plant Proteins (metabolism)</term>
<term>Plant Stems (genetics)</term>
<term>Plant Stems (metabolism)</term>
<term>Populus (genetics)</term>
<term>Populus (metabolism)</term>
<term>Transcription Factors (genetics)</term>
<term>Transcription Factors (metabolism)</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr"><term>Facteurs de transcription (génétique)</term>
<term>Facteurs de transcription (métabolisme)</term>
<term>Lignine (biosynthèse)</term>
<term>Lignine (génétique)</term>
<term>Paroi cellulaire (génétique)</term>
<term>Paroi cellulaire (métabolisme)</term>
<term>Populus (génétique)</term>
<term>Populus (métabolisme)</term>
<term>Protéines végétales (génétique)</term>
<term>Protéines végétales (métabolisme)</term>
<term>Régulation de l'expression des gènes végétaux (physiologie)</term>
<term>Tiges de plante (génétique)</term>
<term>Tiges de plante (métabolisme)</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="biosynthesis" xml:lang="en"><term>Lignin</term>
</keywords>
<keywords scheme="MESH" qualifier="biosynthèse" xml:lang="fr"><term>Lignine</term>
</keywords>
<keywords scheme="MESH" qualifier="genetics" xml:lang="en"><term>Cell Wall</term>
<term>Lignin</term>
<term>Plant Proteins</term>
<term>Plant Stems</term>
<term>Populus</term>
<term>Transcription Factors</term>
</keywords>
<keywords scheme="MESH" qualifier="génétique" xml:lang="fr"><term>Facteurs de transcription</term>
<term>Lignine</term>
<term>Paroi cellulaire</term>
<term>Populus</term>
<term>Protéines végétales</term>
<term>Tiges de plante</term>
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<keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Cell Wall</term>
<term>Plant Proteins</term>
<term>Plant Stems</term>
<term>Populus</term>
<term>Transcription Factors</term>
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<keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Facteurs de transcription</term>
<term>Paroi cellulaire</term>
<term>Populus</term>
<term>Protéines végétales</term>
<term>Tiges de plante</term>
</keywords>
<keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Régulation de l'expression des gènes végétaux</term>
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<front><div type="abstract" xml:lang="en">WRKY proteins are one of the largest transcription factor families in higher plants and play diverse roles in various biological processes. Previous studies have shown that some WRKY members act as negative regulators of secondary cell wall formation in pith parenchyma cells. However, the regulatory mechanism of pith secondary wall formation in tree species remains largely unknown. In this study, PtrWRKY19 encoding a homolog of Arabidopsis WRKY12 was isolated from Populus trichocarpa. PtrWRKY19 was expressed in all tissues tested, with highest expression in stems, especially in pith. PtrWRKY19 was located in the nucleus and functioned as a transcriptional repressor. Ectopic expression of PtrWRKY19 in an atwrky12 mutant successfully rescued the phenotype in pith cell walls caused by the defect of AtWRKY12, suggesting that PtrWRKY19 had conserved functions for homologous AtWRKY12. Overexpression of PtrWRKY19 in poplar plants led to a significant increase in the number of pith parenchyma cells. qRT-PCR analysis showed that lignin biosynthesis-related genes were repressed in transgenic plants. In transcient reporter assays, PtrWRKY19 was identified to repress transcription from the PtoC4H2 promoter containing the conserved W-box elements. These results indicated that PtrWRKY19 may function as a negative regulator of pith secondary wall formation in poplar. </div>
</front>
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<DateCompleted><Year>2016</Year>
<Month>12</Month>
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<ArticleTitle>PtrWRKY19, a novel WRKY transcription factor, contributes to the regulation of pith secondary wall formation in Populus trichocarpa.</ArticleTitle>
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<Abstract><AbstractText>WRKY proteins are one of the largest transcription factor families in higher plants and play diverse roles in various biological processes. Previous studies have shown that some WRKY members act as negative regulators of secondary cell wall formation in pith parenchyma cells. However, the regulatory mechanism of pith secondary wall formation in tree species remains largely unknown. In this study, PtrWRKY19 encoding a homolog of Arabidopsis WRKY12 was isolated from Populus trichocarpa. PtrWRKY19 was expressed in all tissues tested, with highest expression in stems, especially in pith. PtrWRKY19 was located in the nucleus and functioned as a transcriptional repressor. Ectopic expression of PtrWRKY19 in an atwrky12 mutant successfully rescued the phenotype in pith cell walls caused by the defect of AtWRKY12, suggesting that PtrWRKY19 had conserved functions for homologous AtWRKY12. Overexpression of PtrWRKY19 in poplar plants led to a significant increase in the number of pith parenchyma cells. qRT-PCR analysis showed that lignin biosynthesis-related genes were repressed in transgenic plants. In transcient reporter assays, PtrWRKY19 was identified to repress transcription from the PtoC4H2 promoter containing the conserved W-box elements. These results indicated that PtrWRKY19 may function as a negative regulator of pith secondary wall formation in poplar. </AbstractText>
</Abstract>
<AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Yang</LastName>
<ForeName>Li</ForeName>
<Initials>L</Initials>
<AffiliationInfo><Affiliation>Key Laboratory of Eco-environments of Three Gorges Reservoir Region, Ministry of Education, Chongqing Key Laboratory of  Transgenic Plant and Safety Control, Institute of Resources Botany, School of Life Sciences, Southwest University, Chongqing 400715, China.</Affiliation>
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<AffiliationInfo><Affiliation>Key Laboratory of Eco-environments of Three Gorges Reservoir Region, Ministry of Education, Chongqing Key Laboratory of  Transgenic Plant and Safety Control, Institute of Resources Botany, School of Life Sciences, Southwest University, Chongqing 400715, China.</Affiliation>
</AffiliationInfo>
<AffiliationInfo><Affiliation>Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, 810008 Xining, China.</Affiliation>
</AffiliationInfo>
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<Month>01</Month>
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<ChemicalList><Chemical><RegistryNumber>0</RegistryNumber>
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<Chemical><RegistryNumber>0</RegistryNumber>
<NameOfSubstance UI="D014157">Transcription Factors</NameOfSubstance>
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PtrWRKY19, a novel WRKY transcription factor, contributes to the regulation of pith secondary wall formation in Populus trichocarpa.

PtrWRKY19, a novel WRKY transcription factor, contributes to the regulation of pith secondary wall formation in Populus trichocarpa.

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