Comparative genomics and evolutionary analyses of the O-methyltransferase gene family in Populus

Bara­kat, Abdelali; Choi, Alex; Yassin, Norzawani Buang M.; Park, Joseph S.; Sun, Zichao; Carlson, John E.

doi:10.1016/j.gene.2011.02.008

Cited by 40 publications

(35 citation statements)

References 47 publications

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“…In Populus, all OMT genes are found on duplicated segments, along with the 12 tandem duplication genes (Barakat et al, 2011). In Oryza, only 15% of OMT genes were located on duplicated segments or distributed in tandem (Barakat et al, 2011). In the citrus genome, 53 of the 58 citrus OMT genes could be located on the predicted segmental duplication regions (Fig.…”

Section: Discussionmentioning

confidence: 97%

“…Recent studies have shown that no whole genome duplications, except an ancient triplication (called the γ event) shared by all core eudicots, occurred in the citrus genome (Jiao et al, 2011.;Xu et al, 2013). In Populus, all OMT genes are found on duplicated segments, along with the 12 tandem duplication genes (Barakat et al, 2011). In Oryza, only 15% of OMT genes were located on duplicated segments or distributed in tandem (Barakat et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

“…There is some evidence that OMT genes may be involved in various abiotic and biotic stress responses (Barakat et al, 2011). However, there is little information on expression pattern of OMT gene family members during plant tissue developmental processes.…”

Section: Discussionmentioning

confidence: 99%

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Systematic analysis of O -methyltransferase gene family and identification of potential members involved in the formation of O -methylated flavonoids in Citrus

Liu

Luo

et al. 2016

Gene

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

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Systematic analysis of O -methyltransferase gene family and identification of potential members involved in the formation of O -methylated flavonoids in Citrus

Liu

Luo

et al. 2016

Gene

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“…The Lu-CCR gene is phylogenetically close to At-CCR involved in developmental lignification in Arabidopsis and CCR downregulation drastically reduces lignin biosynthesis (Lacombe et al, 1997;Dauwe et al, 2007;Leplé et al, 2007). By contrast, the Lu-COMT and Lu-CAD genes are not part of the bona fide lignin group responsible for developmental lignification (Supplemental Figure 3 and Supplemental Data Sets 4 to 6) but rather belong to gene groups involved in the response to stress or pathogen attack (Barakat et al, 2010(Barakat et al, , 2011. This observation is interesting since among the 20 most abundant transcripts in the inner-and outer-stem tissues, several are potentially involved in defense, raising the possibility that increased lignification in the lbf1 mutant could be caused by a mutation affecting the defense signaling and/or response pathway.…”

Section: Characterization Of the Flax Lbf1 Mutantmentioning

confidence: 99%

Ectopic Lignification in the Flax lignified bast fiber1 Mutant Stem Is Associated with Tissue-Specific Modifications in Gene Expression and Cell Wall Composition

et al. 2014

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Histochemical screening of a flax ethyl methanesulfonate population led to the identification of 93 independent M2 mutant families showing ectopic lignification in the secondary cell wall of stem bast fibers. We named this core collection the Linum usitatissimum (flax) lbf mutants for lignified bast fibers and believe that this population represents a novel biological resource for investigating how bast fiber plants regulate lignin biosynthesis. As a proof of concept, we characterized the lbf1 mutant and showed that the lignin content increased by 350% in outer stem tissues containing bast fibers but was unchanged in inner stem tissues containing xylem. Chemical and NMR analyses indicated that bast fiber ectopic lignin was highly condensed and rich in G-units. Liquid chromatography-mass spectrometry profiling showed large modifications in the oligolignol pool of lbf1 innerand outer-stem tissues that could be related to ectopic lignification. Immunological and chemical analyses revealed that lbf1 mutants also showed changes to other cell wall polymers. Whole-genome transcriptomics suggested that ectopic lignification of flax bast fibers could be caused by increased transcript accumulation of (1) the cinnamoyl-CoA reductase, cinnamyl alcohol dehydrogenase, and caffeic acid O-methyltransferase monolignol biosynthesis genes, (2) several lignin-associated peroxidase genes, and (3) genes coding for respiratory burst oxidase homolog NADPH-oxidases necessary to increase H 2 O 2 supply.

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“…Phylogeny across land plant lineages showed that OMT genes were distributed in two main classes, also suggesting that they have evolved by a gene duplication that had happened in the ancestor of land plants (Barakat et al, 2011). Soybean undergoes two separate polyploidy events resulting in 75% of genes present in multiple copies.…”

Section: Genome Duplication and The Origin Of Angiospermmentioning

confidence: 99%

Gene duplication: A major force in evolution and bio-diversity

Roy¹,

Deo²

2014

Int. J. Biodivers. Conserv.

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Bridges reported one of the earliest observations of gene duplication from the doubling of a chromosomal band in a mutant of the fruit fly, Drosophila melanogaster, which exhibited extreme reduction in eye size. Based on whole-genome analysis of Arabidopsis thaliana, there is compelling evidence that angiosperms underwent two whole-genome duplication events early during their evolutionary history. Recent studies have shown that these events were crucial for the creation of many important developmental and regulatory genes found in extant angiosperm genomes. Recent studies provide strong indications that even yeast (Saccharomyces cerevisiae), with its compact genome, is in fact an ancient tetraploid. Gene duplication is providing new genetic material for mutation, drift and selection to act upon, the result of which is specialized or new gene functions. Without gene duplication, the plasticity of a genome or species in adapting to changing environments would be severely limited. The era of whole genome sequencing of model organisms suggests a number of duplication events take place while evolving modern species.

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Comparative genomics and evolutionary analyses of the O-methyltransferase gene family in Populus

Cited by 40 publications

References 47 publications

Systematic analysis of O -methyltransferase gene family and identification of potential members involved in the formation of O -methylated flavonoids in Citrus

Systematic analysis of O -methyltransferase gene family and identification of potential members involved in the formation of O -methylated flavonoids in Citrus

Ectopic Lignification in the Flax lignified bast fiber1 Mutant Stem Is Associated with Tissue-Specific Modifications in Gene Expression and Cell Wall Composition

Gene duplication: A major force in evolution and bio-diversity

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