A transcriptional roadmap to wood formation
Magnus Hertzberg,Henrik Aspeborg,Jarmo Schrader,Anders F. Andersson,Rikard Erlandsson,Kristina Blomqvist,Rupali Bhalerao,Mathias Uhlén,Tuula T. Teeri,Joakim Lundeberg,Björn Sundberg,Peter Nilsson,Göran Sandberg +12 more
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TLDR
The large vascular meristem of poplar trees with its highly organized secondary xylem enables the boundaries between different developmental zones to be easily distinguished, and this property of wood-forming tissues allowed us to determine a unique tissue-specific transcript profile for a well defined developmental gradient.Abstract:
The large vascular meristem of poplar trees with its highly organized secondary xylem enables the boundaries between different developmental zones to be easily distinguished. This property of wood-forming tissues allowed us to determine a unique tissue-specific transcript profile for a well defined developmental gradient. RNA was prepared from different developmental stages of xylogenesis for DNA microarray analysis by using a hybrid aspen unigene set consisting of 2,995 expressed sequence tags. The analysis revealed that the genes encoding lignin and cellulose biosynthetic enzymes, as well as a number of transcription factors and other potential regulators of xylogenesis, are under strict developmental stage-specific transcriptional regulation.read more
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Lignins: Natural polymers from oxidative coupling of 4-hydroxyphenyl- propanoids
John Ralph,Knut Lundquist,Gösta Brunow,Fachuang Lu,Hoon Kim,Paul F. Schatz,Jane M. Marita,Ronald D. Hatfield,Sally A. Ralph,Jorgen Holst Christensen,Wout Boerjan +10 more
TL;DR: A recent challenge to the currently accepted theory of chemically controlled lignification, attempting to bring lignin into line with more organized biopolymers such as proteins, is logically inconsistent with the most basic details of the structure.
Journal ArticleDOI
Abiotic stresses and induced BVOCs.
TL;DR: In conclusion, oxidative and thermal stresses are relieved in the presence of volatile terpenes and C6 compounds, and methyl salicylate are thought to promote direct and indirect defence by modulating the signalling that biochemically activate defence pathways.
Biotechnology on genetic control of lignin biosynthesis in trees -Repression of lignin biosynthesis promotes cellulose accumulation and growth in transgenic trees-
HU Wen-jing,A Harding Scott,Jrhau Lung,Popko Jacqueline l.,John Ralph,D Stokke Douglas,Tsai Chung-jui,Vincent L. Chiang +7 more
TL;DR: It is indicated that lignin and cellulose deposition could be regulated in a compensatory fashion, which may contribute to metabolic flexibility and a growth advantage to sustain the long-term structural integrity of woody perennials.
Wood Formation in Trees
Melanie Mauriat,Grégoire Le Provost,Phillippe Rozenberg,Sylvain Delzon,Nathalie Breda,Bruno Clair,Catherine Coutand,Jean-Christoph Domec,Thierry Fourcaud,Jacqueline Grima-Pettenati,Raúl Herrera,Jean-Charles Leplé,Nicolas Richet,Jean-François Trontin,Christophe Plomion +14 more
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New insights into pectin methylesterase structure and function.
TL;DR: Although, overall, protein structures are highly conserved between isoforms, recent data indicate that structural variations might be associated with the targeting and functions of specific pectin methylesterases.
References
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Journal ArticleDOI
Repression of lignin biosynthesis promotes cellulose accumulation and growth in transgenic trees
Wenjing Hu,Scott A. Harding,Jrhau Lung,Jacqueline L. Popko,John Ralph,Douglas D. Stokke,Chung-Jui Tsai,Vincent L. Chiang +7 more
TL;DR: In this article, the expression of a lignin biosynthetic pathway gene Pt4CL1 encoding 4-coumarate:coenzyme A ligase (4CL) has been downregulated by antisense inhibition.
Biotechnology on genetic control of lignin biosynthesis in trees -Repression of lignin biosynthesis promotes cellulose accumulation and growth in transgenic trees-
HU Wen-jing,A Harding Scott,Jrhau Lung,Popko Jacqueline l.,John Ralph,D Stokke Douglas,Tsai Chung-jui,Vincent L. Chiang +7 more
TL;DR: It is indicated that lignin and cellulose deposition could be regulated in a compensatory fashion, which may contribute to metabolic flexibility and a growth advantage to sustain the long-term structural integrity of woody perennials.
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