The role of of laccase in lignification

O’Malley, David M.; Whetten, Ross; Bao, Wuli; Chen, Chen-Loung; Sederoff, Ronald R.

doi:10.1046/j.1365-313x.1993.04050751.x

Cited by 186 publications

(89 citation statements)

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“…There are six clones with similarity to diphenol oxidase (laccase) and only one clone similar to peroxidase, both types of enzymes thought to be involved in lignification. The difference in apparent abundance of these two classes of enzymes suggests that diphenol oxidases may be more important than peroxidases in lignin biosynthesis in pine xylem (31,32). Only one of the 16 clones similar to genes involved in lignin biosynthesis was from the N library; all others were from the C or NA libraries.…”

Section: Resultsmentioning

confidence: 99%

Analysis of xylem formation in pine by cDNA sequencing

Allona

Quinn

Shoop

et al. 1998

Proc. Natl. Acad. Sci. U.S.A.

313

194

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Secondary xylem (wood) formation is likely to involve some genes expressed rarely or not at all in herbaceous plants. Moreover, environmental and developmental stimuli inf luence secondary xylem differentiation, producing morphological and chemical changes in wood. To increase our understanding of xylem formation, and to provide material for comparative analysis of gymnosperm and angiosperm sequences, ESTs were obtained from immature xylem of loblolly pine (Pinus taeda L.). A total of 1,097 single-pass sequences were obtained from 5 ends of cDNAs made from gravistimulated tissue from bent trees. Cluster analysis detected 107 groups of similar sequences, ranging in size from 2 to 20 sequences. A total of 361 sequences fell into these groups, whereas 736 sequences were unique. About 55% of the pine EST sequences show similarity to previously described sequences in public databases. About 10% of the recognized genes encode factors involved in cell wall formation. Sequences similar to cell wall proteins, most known lignin biosynthetic enzymes, and several enzymes of carbohydrate metabolism were found. A number of putative regulatory proteins also are represented. Expression patterns of several of these genes were studied in various tissues and organs of pine. Sequencing novel genes expressed during xylem formation will provide a powerful means of identifying mechanisms controlling this important differentiation pathway.

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Section: Resultsmentioning

confidence: 99%

Analysis of xylem formation in pine by cDNA sequencing

Allona

Quinn

Shoop

et al. 1998

Proc. Natl. Acad. Sci. U.S.A.

313

194

View full text Add to dashboard Cite

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“…In line with the overrepresentation of lignin biosynthesisrelated GO terms, six laccases (GRMZM2G146152_P01, GRMZM2G164467_P01, GRMZM5G814718_P01, GRMZM-2G367668_P01, GRMZM2G388587_P01, and GRMZM2-G305526_P01) were accumulated exclusively in the stele (Supplemental Data Sets S1 and S3). Laccases are multicopper-containing glykoproteins that are involved in lignin polymerization in plants (for review, see O'Malley et al, 1993). In a variety of plant species, laccases are expressed in lignified cells, as for instance in the vasculature of Arabidopsis (Zhao et al, 2013), the xylem of loblolly pine (Pinus taeda; Bao et al, 1993), and maize roots (Liang et al, 2006).…”

Section: Discussionmentioning

confidence: 99%

A High-Resolution Tissue-Specific Proteome and Phosphoproteome Atlas of Maize Primary Roots Reveals Functional Gradients along the Root Axes

et al. 2015

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A high-resolution proteome and phosphoproteome atlas of four maize (Zea mays) primary root tissues, the cortex, stele, meristematic zone, and elongation zone, was generated. High-performance liquid chromatography coupled with tandem mass spectrometry identified 11,552 distinct nonmodified and 2,852 phosphorylated proteins across the four root tissues. Two gradients reflecting the abundance of functional protein classes along the longitudinal root axis were observed. While the classes RNA, DNA, and protein peaked in the meristematic zone, cell wall, lipid metabolism, stress, transport, and secondary metabolism culminated in the differentiation zone. Functional specialization of tissues is underscored by six of 10 cortex-specific proteins involved in flavonoid biosynthesis. Comparison of this data set with high-resolution seed and leaf proteome studies revealed 13% (1,504/11,552) root-specific proteins. While only 23% of the 1,504 root-specific proteins accumulated in all four root tissues, 61% of all 11,552 identified proteins accumulated in all four root tissues. This suggests a much higher degree of tissue-specific functionalization of root-specific proteins. In summary, these data illustrate the remarkable plasticity of the proteomic landscape of maize primary roots and thus provide a starting point for gaining a better understanding of their tissue-specific functions.

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“…In one case, the immunolocalization of AGP6 is restricted to radially expanded cells just preceding the thickening of their secondary walls (Y. Zhang, unpublished results). Sequences encoding phytocyanin-like proteins are of interest because they contain both a domain similar to proteins associated with cell walls, and a laccase-like domain, both associated with activities thought to have a role in wood formation (O'Malley et al, 1993;Zhang et al, 2000).…”

Section: What Types Of Genes Are Abundantly Expressed In Wood-formingmentioning

confidence: 99%

Functional genomics and cell wall biosynthesis in loblolly pine

et al. 2001

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Loblolly pine (Pinus taeda L.) is the most widely planted tree species in the USA and an important tree in commercial forestry world-wide. The large genome size and long generation time of this species present obstacles to both breeding and molecular genetic analysis. Gene discovery by partial DNA sequence determination of cDNA clones is an effective means of building a knowledge base for molecular investigations of mechanisms governing aspects of pine growth and development, including the commercially relevant properties of secondary cell walls in wood. Microarray experiments utilizing pine cDNA clones can be used to gain additional information about the potential roles of expressed genes in wood formation. Different methods have been used to analyze data from first-generation pine microarrays, with differing degrees of success. Disparities in predictions of differential gene expression between cDNA sequencing experiments and microarray experiments arise from differences in the nature of the respective analyses, but both approaches provide lists of candidate genes which should be further investigated for potential roles in cell wall formation in differentiating pine secondary xylem. Some of these genes seem to be specific to pine, while others also occur in model plants such as Arabidopsis, where they could be more efficiently investigated.

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The role of of laccase in lignification

Cited by 186 publications

References 0 publications

Analysis of xylem formation in pine by cDNA sequencing

Analysis of xylem formation in pine by cDNA sequencing

A High-Resolution Tissue-Specific Proteome and Phosphoproteome Atlas of Maize Primary Roots Reveals Functional Gradients along the Root Axes

Functional genomics and cell wall biosynthesis in loblolly pine

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