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Segmentation of Highly Lignified Zones in Wood Fiber Cross-Sections [chapter]

Bettina Selig, Cris L. Luengo Hendriks, Stig Bardage, Gunilla Borgefors
2009 Lecture Notes in Computer Science  
To correlate exact levels of lignin in wood fibers to their mechanical properties, lignin autofluorescence is imaged in wood fiber cross-sections.  ...  To make a preliminary evaluation we used an image which contained 17 complete cell cross-sections. This image was segmented both automatically and manually by an expert.  ...  Cross-section of a normal lignified wood cell (a) and a wood cell with highly lignified zone (b).  ... 
doi:10.1007/978-3-642-02230-2_38 fatcat:toukjqubrjbahobzmeasq7kg5a

Identification of RING-H2 Gene Candidates Related to Wood Formation in Poplar

Guimin Tong, Hongmei Shen, Shenquan Cao, Wenjing Xu, Xujun Ma, Yuxiang Cheng
2019 Forests  
Microarray dataset (from Affymetrix poplar genome arrays) showed that 64 of the 249 RING-H2 genes were highly or preferentially expressed in stem xylem.  ...  from the expanding xylem to the lignifying xylem, suggesting their association with wood formation.  ...  (a-d) Cross-sections of the internodes (INs) 3, 5, 7 and 9; (e-h) the magnified cross-sections of the INs 3, 5, 7 and 9.  ... 
doi:10.3390/f10080698 fatcat:4vnmgrxyhbaelpv76jvjiunab4

The Populus homeobox gene ARBORKNOX2 regulates cell differentiation during secondary growth

Juan Du, Shawn D. Mansfield, Andrew T. Groover
2009 The Plant Journal  
In the early stages of secondary growth, ARK2 is expressed broadly in the cambial zone and in terminally differentiating cell types, before becoming progressively restricted to the cambium.  ...  ARK20verexpression and synthetic miRNA-suppression' transgenics reveal positi'lle correlations between ARK2 expression level and the timing of cambium formation, the width of the cambial zone and inhibition  ...  ACKNOWLEDGEMENTS We owe our thanks to Gayle Dupper for Populus tissue culture and cultivation, and Annie Mix for the glasshouse cultivation of plants.  ... 
doi:10.1111/j.1365-313x.2009.04017.x pmid:19737362 fatcat:u6bbzexwbbcw5gxw4ayksymrvy

Elongation of wood fibers combines features of diffuse and tip growth

Mateusz Majda, Liudmila Kozlova, Alicja Banasiak, Marta Derba‐Maceluch, Igor A. Iashchishyn, Ludmilla A. Morozova‐Roche, Richard S. Smith, Tatyana Gorshkova, Ewa J. Mellerowicz
2021 New Phytologist  
Xylem fibers are highly elongated cells that are key constituents of wood, play major physiological roles in plants, comprise an important terrestrial carbon reservoir, and thus have enormous ecological  ...  Computer modeling revealed that the intercellular space formation needed for intrusive growth may only require targeted release of cell adhesion, which allows turgor pressure in neighboring fiber cells  ...  We acknowledge the Biochemical Imaging Center at Ume a University (BiCU) for use of the AFM.  ... 
doi:10.1111/nph.17468 pmid:33993523 fatcat:vy573mcysnhrvceirflc66efou

How the Cucumber Tendril Coils and Overwinds

S. J. Gerbode, J. R. Puzey, A. G. McCormick, L. Mahadevan
2012 Science  
articles ): December 6, 2012 (this information is current as of The following resources related to this article are available online at  ...  you can order high-quality copies for your If you wish to distribute this article to others here. following the guidelines can be obtained by Permission to republish or repurpose articles or portions of  ...  In the tendril cross section, darkfield (E) and UV autofluorescence (F) show strong lignification in the fiber ribbon.  ... 
doi:10.1126/science.1223304 pmid:22936777 fatcat:jz7dnrzwmzcnzg36fsjsxd5caq

United States Pharmacopœia

1914 The Journal of the American Pharmaceutical Association (1912)  
A second installment of the abstract of proposed new descriptions and standards, and of changes in descriptions and standards is herewith submitted.  ...  This abstract embraces most of the drugs of vegetable and animal origin.  ...  a very narrow zone of the cross-section ; in older roots a corky layer of 4 or 5 rows of tangentially elongated, light yellowish or yellowish-brown cells; outer bark of about 20 rows of cells on one side  ... 
doi:10.1002/jps.3080030322 fatcat:tlfvnrzuajcn5gvn7lh6nl2xl4

Cell differentiation and tissue formation in the unique fruits of devil's claws (Martyniaceae)

Melanie Horbens, Jie Gao, Christoph Neinhuis
2014 American Journal of Botany  
In both species, the hooks of mature capsules had similar dimensions in cross section (2.7-3.0 mm high, and 1.9-2.1 mm wide, middle segment), while the lengths (arc lengths) differed signifi cantly (72  ...  The anatomical studies have focused on the stem wood ( Carlquist, 1987 ) or the terminal capsule segment of P. louisianica , including mostly general descriptions of lignifi ed sclerenchyma fi bers  ... 
doi:10.3732/ajb.1400006 pmid:24907252 fatcat:mvqqbaddvrfephyjaiojrhige4

Ultrastructural aspects of rubber tree root rot diseases

M. Nicole, J. P. Geiger, D. Nandris
1987 Forest Pathology  
This aper descri1es the different mechanisms used by these two fungi in degrading lignified and non {gnified tissues. O 1987Verlag Paul Parey, Hamburgund Berlin-. -----  ...  The aggression of Hevea brusiliensis roots by two root-rot fungi, Rigidoporus lignosus and Phellinus noxitls is studied at cellular level.  ...  Organization of walls of a xylem vessel of a healthy youn root; (x 12500) -Figs. 21 and 22.Wood degradation by R. ligizosus: a cross section through a vesse?  ... 
doi:10.1111/j.1439-0329.1987.tb00722.x fatcat:j4e4fxk7yzhkho2poldgp2qkle

Geochemical Support for a Climbing Habit within the Paleozoic Seed Fern Genus Medullosa

Jonathan P. Wilson, Woodward W. Fischer
2011 International journal of plant sciences  
Analysis of the medullosan stem reveals a consistent difference in isotope ratios of 0.7&-1.0& between lignified xylem and cortical tissues.  ...  species widely found in calcium carbonate concretions ("coal balls") in the Pennsylvanian coal beds of Iowa, USA.  ...  Acknowledgments We thank Suzanne Costanza of the Harvard University Paleobotanical Collections for supplying the stems and petioles used in this study, Rebecca Zentmyer for laboratory assistance, J.  ... 
doi:10.1086/658929 fatcat:udwdynhazbe7tlje65t3dbratu

Macroscopical and microscopical analysis of selected Indian medicinal plants and HPTLC method for quantification of chemical markers in a polyherbal formulation

Karunanithi Shalini, Kaliappan Ilango
2022 Journal of Pharmacy & Pharmacognosy Research  
of chemical markers in polyherbal formulation.  ...  Aims: To explore the pharmacognostical and quantitative estimation of chemical markers lupeol, rutin and shatavarin IV in polyherbal formulation using HPTLC analysis.  ...  This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.  ... 
doaj:f6276188d2af41178bcf8bdd1c0fda54 fatcat:yzlaw72ifnbafbe4gcgi2f3kz4

A metabolite roadmap of the wood-forming tissue in Populus tremula

Ilka N Abreu, Annika I Johansson, Katarzyna Sokołowska, Totte Niittylä, Björn Sundberg, Torgeir R Hvidsten, Nathaniel R Street, Thomas Moritz
2020 New Phytologist  
Wood, or secondary xylem, is the product of xylogenesis, a developmental process that begins with the proliferation of cambial derivatives and ends with mature xylem fibers and vessels with lignified secondary  ...  To evaluate the role of metabolites during wood formation we performed a high spatial resolution metabolomics study of the wood-forming zone of Populus tremula, including laser dissected aspen ray and  ...  This study was financially supported by the Carl Tryggers foundation, the Kempe Foundation, Formas, Knut & Alice Wallenberg Foundation and corresponding cofunding from the Swedish University of Agricultural  ... 
doi:10.1111/nph.16799 pmid:32648607 fatcat:4kbtylzmfjdjrd5tyjggs62psa

Morphological and Genetic Characteristics of Sophora secundiflora and Sophora tomentosa (Fabaceae) cultivated in Egypt

Omayma Eldahshan, shaza Aly, Ahmed Elissawy, Mohammed Elshanawany, Abdel Nasser Singab
2019 Taeckholmia  
This study is a pioneer regarding the detailed botanical structure of both species; in addition to, the DNA fingerprinting to distinguish these species; in different prescriptions.  ...  The obtained results revealed that, many differences in morphological characters viz. the color of the flower, shape of the petiole and leaf dimensions.  ...  The xylem is formed of lignified vessels, tracheids, fibers, wood parenchyma and is traversed by uni-to biseriate narrow lignified medullary rays.  ... 
doi:10.21608/taec.2020.20572.1010 fatcat:wa4y7lmk4rdqflzibhr4d65cgu

Xyloglucan Endo-transglycosylase (XET) Functions in Gelatinous Layers of Tension Wood Fibers in Poplar—A Glimpse into the Mechanism of the Balancing Act of Trees

Nobuyuki Nishikubo, Tatsuya Awano, Alicja Banasiak, Veronica Bourquin, Farid Ibatullin, Ryo Funada, Harry Brumer, Tuula T. Teeri, Takahisa Hayashi, Björn Sundberg, Ewa J. Mellerowicz
2007 Plant and Cell Physiology  
When the G-layer was fully developed, the signal was more concentrated in the outer zone of the G-layer close to the lignified S 2 -layer ( Fig. 5E ).  ...  Stem segments were frozen in liquid nitrogen.  ... 
doi:10.1093/pcp/pcm055 pmid:17504814 fatcat:gmighua7j5epbcg7bx5mv7u2gi

New insights into plant cell walls by vibrational microspectroscopy

Notburga Gierlinger
2017 Applied spectroscopy reviews (Softcover ed.)  
Vibrational spectroscopy provides non-destructively the molecular fingerprint of plant cells in the native state.  ...  In combination with microscopy, the chemical composition can be followed in context with the microstructure, and due to the non-destructive application, in-situ studies of changes during, e.g., degradation  ...  changes were observed in the lignified normal wood fibers ( Figure 12B first row, C) within the same section and experiment.  ... 
doi:10.1080/05704928.2017.1363052 pmid:30057488 pmcid:PMC6050719 fatcat:bnr33jwnyvef3ktgcsfp25xr24

Class I KNOX transcription factors promote differentiation of cambial derivatives into xylem fibers in the Arabidopsis hypocotyl

D. Liebsch, W. Sunaryo, M. Holmlund, M. Norberg, J. Zhang, H. C. Hall, H. Helizon, X. Jin, Y. Helariutta, O. Nilsson, A. Polle, U. Fischer
2014 Development  
In a knat1;stm double mutant, xylem fiber differentiation was completely abolished, but residual cambial activity was maintained.  ...  KNAT1 and STM were found to act through transcriptional repression of the meristem boundary genes BLADE-ON-PETIOLE 1 (BOP1) and BOP2 on xylem fiber differentiation.  ...  Acknowledgements We thank Angela Hay (University of Oxford, UK) and Wolfgang Werr (University of Cologne, Germany) for providing us with knat1 bp-9 and pSTM::GUS seed stocks, respectively.  ... 
doi:10.1242/dev.111369 pmid:25371365 fatcat:zggjkrppu5hetn6dlhuh27pa4y
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