scholarly journals Identification and Functional Characterization of PtoMYB055 Involved in the Regulation of the Lignin Biosynthesis Pathway in Populus tomentosa

2020 ◽  
Vol 21 (14) ◽  
pp. 4857
Author(s):  
Yiming Sun ◽  
Sha Ren ◽  
Shenglong Ye ◽  
Qiaoyan Tian ◽  
Keming Luo
Keyword(s):  
Cell Wall ◽  
Vascular Plants ◽  
Secondary Cell Wall ◽  
Functional Characterization ◽  
Lignin Biosynthesis ◽  
Transcriptional Activator ◽  
Populus Tomentosa ◽  
Myb Transcription Factor ◽  
Phloem Tissue

Wood, which is mainly composed of lignified secondary cell wall, is the most abundant biomass in woody plants. Previous studies have revealed that R2R3-type MYB transcription factors are important regulators of the formation of the secondary cell wall in vascular plants. In this study, we isolated the R2R3-type MYB transcription factor gene PtoMYB055, which is mainly expressed in xylem and phloem tissue, from Populus tomentosa and demonstrate that PtoMYB055 is a key regulator of lignin biosynthesis. PtoMYB055 as a transcriptional activator is localized to the nucleus. Overexpression of PtoMYB055 upregulates expression of lignin biosynthetic genes in transgenic poplar plants, resulting in ectopic deposition of lignin in phloem tissue and an increase in thickness of the secondary cell wall. In sum, PtoMYB055 is a transcriptional activator that is involved in regulating lignin biosynthesis during the formation of the secondary cell wall in poplar.

scholarly journals EgMYB2, a new transcriptional activator from Eucalyptus xylem, regulates secondary cell wall formation and lignin biosynthesis

2005 ◽  
Vol 43 (4) ◽  
pp. 553-567 ◽  
Author(s):  
Monica Goicoechea ◽  
Eric Lacombe ◽  
Sylvain Legay ◽  
Snjezana Mihaljevic ◽  
Philippe Rech ◽  
...  
Keyword(s):  
Cell Wall ◽  
Secondary Cell Wall ◽  
Lignin Biosynthesis ◽  
Transcriptional Activator ◽  
Cell Wall Formation ◽  
Secondary Cell Wall Formation ◽  
Wall Formation

scholarly journals Functional Characterization of Enzymatic Steps Involved in Pyruvylation of Bacterial Secondary Cell Wall Polymer Fragments

2018 ◽  
Vol 9 ◽  
Author(s):  
Fiona F. Hager ◽  
Arturo López-Guzmán ◽  
Simon Krauter ◽  
Markus Blaukopf ◽  
Mathias Polter ◽  
...  
Keyword(s):  
Cell Wall ◽  
Secondary Cell Wall ◽  
Functional Characterization ◽  
Cell Wall Polymer ◽  
Secondary Cell Wall Polymer

scholarly journals MYB Transcription Factors and Its Regulation in Secondary Cell Wall Formation and Lignin Biosynthesis during Xylem Development

2021 ◽  
Vol 22 (7) ◽  
pp. 3560
Author(s):  
Ruixue Xiao ◽  
Chong Zhang ◽  
Xiaorui Guo ◽  
Hui Li ◽  
Hai Lu
Keyword(s):  
Cell Wall ◽  
Transcription Factors ◽  
Secondary Wall ◽  
Secondary Cell Wall ◽  
Lignin Biosynthesis ◽  
Cell Wall Formation ◽  
Long Distance ◽  
Secondary Cell Wall Formation ◽  
Myb Transcription Factors ◽  
Wall Formation

The secondary wall is the main part of wood and is composed of cellulose, xylan, lignin, and small amounts of structural proteins and enzymes. Lignin molecules can interact directly or indirectly with cellulose, xylan and other polysaccharide molecules in the cell wall, increasing the mechanical strength and hydrophobicity of plant cells and tissues and facilitating the long-distance transportation of water in plants. MYBs (v-myb avian myeloblastosis viral oncogene homolog) belong to one of the largest superfamilies of transcription factors, the members of which regulate secondary cell-wall formation by promoting/inhibiting the biosynthesis of lignin, cellulose, and xylan. Among them, MYB46 and MYB83, which comprise the second layer of the main switch of secondary cell-wall biosynthesis, coordinate upstream and downstream secondary wall synthesis-related transcription factors. In addition, MYB transcription factors other than MYB46/83, as well as noncoding RNAs, hormones, and other factors, interact with one another to regulate the biosynthesis of the secondary wall. Here, we discuss the biosynthesis of secondary wall, classification and functions of MYB transcription factors and their regulation of lignin polymerization and secondary cell-wall formation during wood formation.

scholarly journals Functional characterization of a new grapevine MYB transcription factor and regulation of proanthocyanidin biosynthesis in grapes

2014 ◽  
Vol 65 (15) ◽  
pp. 4433-4449 ◽  
Author(s):  
Kazuya Koyama ◽  
Mineyo Numata ◽  
Ikuko Nakajima ◽  
Nami Goto-Yamamoto ◽  
Hideo Matsumura ◽  
...  
Keyword(s):  
Transcription Factor ◽  
Functional Characterization ◽  
Myb Transcription Factor

Identification and Functional Characterization of R3 MYB Transcription Factor Genes in Soybean

2018 ◽  
Vol 61 (2) ◽  
pp. 85-96 ◽  
Author(s):  
Hongwei Xun ◽  
Zhibing Zhang ◽  
Yunxiao Zhou ◽  
Xueyan Qian ◽  
Yingshan Dong ◽  
...  
Keyword(s):  
Transcription Factor ◽  
Functional Characterization ◽  
Myb Transcription Factor ◽  
Transcription Factor Genes
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