Arabidopsis as a model for wood formation

Zhang, Jing; Elo, Annakaisa; Helariutta, Yrjö

doi:10.1016/j.copbio.2010.11.008

Cited by 88 publications

(63 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this latter study, different MYB TF genes were expressed in flax stem tissues and seeds, although six MYB TF genes were also expressed in both tissues. We also observed that the flax orthologs of several genes encoding NAC factors, such as SND1, SND2, XND1, VNI2, and KNAT7, previously shown to be involved in the control of secondary cell wall formation and/or xylem vessel differentiation and forming part of a transcriptional control network, were also differentially regulated between inner and outer stem tissues (Zhao et al, 2008;Yamaguchi et al, 2010;Zhang et al, 2011;Zhao and Dixon, 2011).…”

Section: Hypolignification In Flax Stems Involves Differential Expresmentioning

confidence: 65%

“…Recent studies have demonstrated that up-/down-regulation of genes encoding different NAC or MYB transcription factors (TFs) modulates the expression of monolignol biosynthesis genes and modifies both lignification and secondary cell wall formation (Zhong et al, 2010;Zhang et al, 2011). Therefore, we focused our attention on genes encoding TFs that were differentially expressed in inner and outer stem tissues in order to identify potential regulators of flax hypolignification.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Natural Hypolignification Is Associated with Extensive Oligolignol Accumulation in Flax Stems

et al. 2012

View full text Add to dashboard Cite

Flax (Linum usitatissimum) stems contain cells showing contrasting cell wall structure: lignified in inner stem xylem tissue and hypolignified in outer stem bast fibers. We hypothesized that stem hypolignification should be associated with extensive phenolic accumulation and used metabolomics and transcriptomics to characterize these two tissues.1 H nuclear magnetic resonance clearly distinguished inner and outer stem tissues and identified different primary and secondary metabolites, including coniferin and p-coumaryl alcohol glucoside. Ultrahigh-performance liquid chromatography-Fourier transform ion cyclotron resonance-mass spectrometry aromatic profiling (lignomics) identified 81 phenolic compounds, of which 65 were identified, to our knowledge, for the first time in flax and 11 for the first time in higher plants. Both aglycone forms and glycosides of monolignols, lignin oligomers, and (neo)lignans were identified in both inner and outer stem tissues, with a preponderance of glycosides in the hypolignified outer stem, indicating the existence of a complex monolignol metabolism. The presence of coniferin-containing secondary metabolites suggested that coniferyl alcohol, in addition to being used in lignin and (neo)lignan formation, was also utilized in a third, partially uncharacterized metabolic pathway. Hypolignification of bast fibers in outer stem tissues was correlated with the low transcript abundance of monolignol biosynthetic genes, laccase genes, and certain peroxidase genes, suggesting that flax hypolignification is transcriptionally regulated. Transcripts of the key lignan genes Pinoresinol-Lariciresinol Reductase and Phenylcoumaran Benzylic Ether Reductase were also highly abundant in flax inner stem tissues. Expression profiling allowed the identification of NAC (NAM, ATAF1/2, CUC2) and MYB transcription factors that are likely involved in regulating both monolignol production and polymerization as well as (neo)lignan production.

show abstract

Section: Hypolignification In Flax Stems Involves Differential Expresmentioning

confidence: 65%

mentioning

confidence: 99%

Natural Hypolignification Is Associated with Extensive Oligolignol Accumulation in Flax Stems

et al. 2012

View full text Add to dashboard Cite

show abstract

“…A few NAC-domain transcription factors (VASCULAR RELATED NAC DOMAIN; VND) have been identified as master regulators of xylem differentiation capable of switching on the developmental program. VND7 (At1g71930) induces protoxylem differentiation and VND6 (At5g62380) metaxylem differentiation (Kubo et al, 2005), while SECONDARY WALL-ASSOCIATED NAC DOMAIN PROTEIN 1/NAC SECONDARY WALL THICKEN-ING PROMOTING FACTOR 3 (SND1/NST3; At1g32770), together with NST1 (At2g46770), promotes fiber differentiation (Mitsuda et al, 2007) (reviewed in Zhang et al, 2011).…”

Section: Xylem Cell Differentiation During Cambial Developmentmentioning

confidence: 99%

Vascular Cambium Development

Nieminen

Blomster

Helariutta

et al. 2015

The Arabidopsis Book

Self Cite

116

110

View full text Add to dashboard Cite

Secondary phloem and xylem tissues are produced through the activity of vascular cambium, the cylindrical secondary meristem which arises among the primary plant tissues. Most dicotyledonous species undergo secondary development, among them Arabidopsis. Despite its small size and herbaceous nature, Arabidopsis displays prominent secondary growth in several organs, including the root, hypocotyl and shoot. Together with the vast genetic resources and molecular research methods available for it, this has made Arabidopsis a versatile and accessible model organism for studying cambial development and wood formation. In this review, we discuss and compare the development and function of the vascular cambium in the Arabidopsis root, hypocotyl, and shoot. We describe the current understanding of the molecular regulation of vascular cambium and compare it to the function of primary meristems. We conclude with a look at the future prospects of cambium research, including opportunities provided by phenotyping and modelling approaches, complemented by studies of natural variation and comparative genetic studies in perennial and woody plant species.

show abstract

“…The cambium is a secondary meristem that partially derives from the procambium in adult plants and is responsible for secondary growth in the diameter of stems and roots through the production of secondary phloem and xylem. In Arabidopsis, the development of the cambium is confined to the base of the inflorescence stem, the hypocotyls, and the mature root (Zhang et al, 2011).…”

mentioning

confidence: 99%

The VASCULATURE COMPLEXITY AND CONNECTIVITY Gene Encodes a Plant-Specific Protein Required for Embryo Provasculature Development

Roschzttardtz¹,

Páez-Valencia²,

Dittakavi³

et al. 2014

PLANT PHYSIOLOGY

View full text Add to dashboard Cite

The molecular mechanisms by which vascular tissues acquire their identities are largely unknown. Here, we report on the identification and characterization of VASCULATURE COMPLEXITY AND CONNECTIVITY (VCC), a member of a 15-member, plant-specific gene family in Arabidopsis (Arabidopsis thaliana) that encodes proteins of unknown function with four predicted transmembrane domains. Homozygous vcc mutants displayed cotyledon vein networks of reduced complexity and disconnected veins. Similar disconnections or gaps were observed in the provasculature of vcc embryos, indicating that defects in vein connectivity appear early in mutant embryo development. Consistently, the overexpression of VCC leads to an unusually high proportion of cotyledons with high-complexity vein networks. Neither auxin distribution nor the polar localization of the auxin efflux carrier were affected in vcc mutant embryos. Expression of VCC was detected in developing embryos and procambial, cambial, and vascular cells of cotyledons, leaves, roots, hypocotyls, and anthers. To evaluate possible genetic interactions with other genes that control vasculature patterning in embryos, we generated a double mutant for VCC and OCTOPUS (OPS). The vcc ops double mutant embryos showed a complete loss of high-complexity vascular networks in cotyledons and a drastic increase in both provascular and vascular disconnections. In addition, VCC and OPS interact physically, suggesting that VCC and OPS are part of a complex that controls cotyledon vascular complexity.

show abstract

Arabidopsis as a model for wood formation

Cited by 88 publications

References 55 publications

Natural Hypolignification Is Associated with Extensive Oligolignol Accumulation in Flax Stems

Natural Hypolignification Is Associated with Extensive Oligolignol Accumulation in Flax Stems

Vascular Cambium Development

The VASCULATURE COMPLEXITY AND CONNECTIVITY Gene Encodes a Plant-Specific Protein Required for Embryo Provasculature Development

Contact Info

Product

Resources

About