Cell wall modification and lignin biosynthesis involved in disease resistance against Diaporthe citri in harvested pummelo fruit elicited by carvacrol

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.

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Transcriptome and metabolome profiling provide insights into molecular mechanism of pseudostem elongation in banana

BMC Plant Biology ◽

10.1186/s12870-021-02899-6 ◽

2021 ◽

Vol 21 (1) ◽

Author(s):

Guiming Deng ◽

Fangcheng Bi ◽

Jing Liu ◽

Weidi He ◽

Chunyu Li ◽

...

Keyword(s):

Cell Wall ◽

Cell Elongation ◽

Molecular Mechanisms ◽

Specific Gene ◽

Wild Type ◽

Banana Plant ◽

Cell Wall Modification ◽

Dwarf Cultivar ◽

Important Trait ◽

Metabolome Profiling

AbstractBackgroundBanana plant height is an important trait for horticultural practices and semi-dwarf cultivars show better resistance to damages by wind and rain. However, the molecular mechanisms controlling the pseudostem height remain poorly understood. Herein, we studied the molecular changes in the pseudostem of a semi-dwarf banana mutant Aifen No. 1 (Musaspp. Pisang Awak sub-group ABB) as compared to its wild-type dwarf cultivar using a combined transcriptome and metabolome approach.ResultsA total of 127 differentially expressed genes and 48 differentially accumulated metabolites were detected between the mutant and its wild type. Metabolites belonging to amino acid and its derivatives, flavonoids, lignans, coumarins, organic acids, and phenolic acids were up-regulated in the mutant. The transcriptome analysis showed the differential regulation of genes related to the gibberellin pathway, auxin transport, cell elongation, and cell wall modification. Based on the regulation of gibberellin and associated pathway-related genes, we discussed the involvement of gibberellins in pseudostem elongation in the mutant banana. Genes and metabolites associated with cell wall were explored and their involvement in cell extension is discussed.ConclusionsThe results suggest that gibberellins and associated pathways are possibly developing the observed semi-dwarf pseudostem phenotype together with cell elongation and cell wall modification. The findings increase the understanding of the mechanisms underlying banana stem height and provide new clues for further dissection of specific gene functions.

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Cell Wall Damage-Induced Lignin Biosynthesis Is Regulated by a Reactive Oxygen Species- and Jasmonic Acid-Dependent Process in Arabidopsis

PLANT PHYSIOLOGY ◽

10.1104/pp.111.175737 ◽

2011 ◽

Vol 156 (3) ◽

pp. 1364-1374 ◽

Cited By ~ 206

Author(s):

Lucinda Denness ◽

Joseph Francis McKenna ◽

Cecile Segonzac ◽

Alexandra Wormit ◽

Priya Madhou ◽

...

Keyword(s):

Reactive Oxygen Species ◽

Cell Wall ◽

Jasmonic Acid ◽

Reactive Oxygen ◽

Lignin Biosynthesis ◽

Oxygen Species ◽

Cell Wall Damage ◽

Dependent Process

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Yeast cell wall induces disease resistance against Penicillium expansum in pear fruit and the possible mechanisms involved

Food Chemistry ◽

10.1016/j.foodchem.2017.08.092 ◽

2018 ◽

Vol 241 ◽

pp. 301-307 ◽

Cited By ~ 13

Author(s):

Cui Sun ◽

Ming Lin ◽

Da Fu ◽

Jiali Yang ◽

Yining Huang ◽

...

Keyword(s):

Cell Wall ◽

Disease Resistance ◽

Yeast Cell ◽

Yeast Cell Wall ◽

Penicillium Expansum ◽

Pear Fruit

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Erratum to: Ethambutol-mediated cell wall modification in recombinant Corynebacterium glutamicum increases the biotransformation rates of cyclohexanone derivatives

Bioprocess and Biosystems Engineering ◽

10.1007/s00449-012-0699-z ◽

2012 ◽

Vol 35 (4) ◽

pp. 665-665

Author(s):

Ji-Yeong Yun ◽

Jung-Eun Lee ◽

Kyung-Mi Yang ◽

Suekyung Cho ◽

Arim Kim ◽

...

Keyword(s):

Cell Wall ◽

Corynebacterium Glutamicum ◽

Cell Wall Modification

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

10.1101/629709 ◽

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.

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