Prior secondary cell wall formation is required for gelatinous layer deposition and posture control in gravi‐stimulated aspen

2021 ◽  
Author(s):  
Naoki Takata ◽  
Taku Tsuyama ◽  
Soichiro Nagano ◽  
Kei’ichi Baba ◽  
Yuko Yasuda ◽  
...  
Keyword(s):  
Cell Wall ◽  
Secondary Cell Wall ◽  
Posture Control ◽  
Cell Wall Formation ◽  
Secondary Cell Wall Formation ◽  
Wall Formation ◽  
Gelatinous Layer ◽  
Layer Deposition

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 Distinct and overlapping functions of Miscanthus sinensis MYB transcription factors SCM1 and MYB103 in lignin biosynthesis

2019 ◽  
Author(s):  
Philippe Golfier ◽  
Faride Unda ◽  
Emily K. Murphy ◽  
Jianbo Xie ◽  
Feng He ◽  
...  
Keyword(s):  
Cell Wall ◽  
Transcriptional Regulation ◽  
Secondary Cell Wall ◽  
Lignin Content ◽  
Lignin Biosynthesis ◽  
Miscanthus Sinensis ◽  
Cell Wall Formation ◽  
Transcriptional Responses ◽  
Secondary Cell Wall Formation ◽  
Wall Formation

AbstractCell wall recalcitrance is a major constraint for the exploitation of lignocellulosic biomass as renewable resource for energy and bio-based products. Transcriptional regulators of the lignin biosynthetic pathway represent promising targets for tailoring lignin content and composition in plant secondary cell walls. A wealth of research in model organisms has revealed that transcriptional regulation of secondary cell wall formation is orchestrated by a hierarchical transcription factor (TF) network with NAC TFs as master regulators and MYB factors in the lower tier regulators. However, knowledge about the transcriptional regulation of lignin biosynthesis in lignocellulosic feedstocks, such as Miscanthus, is limited. Here, we characterized two Miscanthus MYB TFs, MsSCM1 and MsMYB103, and compared their transcriptional impact with that of the master regulator MsSND1. In Miscanthus leaves MsSCM1 and MsMYB103 are expressed at growth stages associated with lignification. Ectopic expression of MsSCM1 and MsMYB103 in tobacco leaves was sufficient to trigger secondary cell wall deposition with distinct sugar and lignin composition. Moreover, RNA-seq analysis revealed that the transcriptional responses to MsSCM1 and MsMYB103 overexpression showed extensive overlap with the response to MsSND1, but were distinct from each other, underscoring the inherent complexity of secondary cell wall formation. Together, MsSCM1 and MsMYB103 represent interesting targets for manipulations of lignin content and composition in Miscanthus towards tailored biomass.

scholarly journals The role of SND2 in the regulation of Arabidopsisfibre secondary cell wall formation

2011 ◽  
Vol 5 (S7) ◽  
Author(s):  
Steven Hussey ◽  
Eshchar Mizrachi ◽  
David Berger ◽  
Alexander Myburg
Keyword(s):  
Cell Wall ◽  
Secondary Cell Wall ◽  
Cell Wall Formation ◽  
Secondary Cell Wall Formation ◽  
Wall Formation

scholarly journals Functional identification of MdMYB5 involved in secondary cell wall formation in apple

2021 ◽  
Vol 1 (1) ◽  
pp. 1-10
Author(s):  
Keqin Chen ◽  
◽  
Xiaoguang Tang ◽  
Mengru Song ◽  
Yunna Guo ◽  
...  
Keyword(s):  
Cell Wall ◽  
Secondary Cell Wall ◽  
Cell Wall Formation ◽  
Functional Identification ◽  
Secondary Cell Wall Formation ◽  
Wall Formation
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