نتایج جستجو برای: lignified cell walls

تعداد نتایج: 1712623  

2011
Jonathan P. Wilson

A long-standing problem in paleobotany is the accurate identification of the growth habits and statures of fossil plants. Tissue-specific analysis of stable carbon isotope ratios in plant fossils can provide an independent perspective on this issue. Lignin, a fundamental biopolymer providing structural support in plant tissues and the second most abundant organic material in plants, is C deplet...

Journal: :The Journal of Experimental Medicine 1962
Stephen I. Morse

The cell walls of Staphylococcus aureus are capable of inactivating S. aureus bacteriophage. Furthermore, the cell walls isolated from S. aureus of a given phage type inactivate a variety of different staphylococcal bacteriophages. Under the conditions employed neither the isolated mucopeptide nor teichoic acid components of the cell walls act as bacteriophage receptor.

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2001
H G Calamita W D Ehringer A L Koch R J Doyle

Several independent experiments suggest that cell walls of Bacillus subtilis are protonated during growth. When cells were grown in the presence of fluorescein-labeled dextran to saturate the cell walls, centrifuged, and suspended in PBS, fluorescence-activated cell sorter analyses revealed the bacteria were only poorly fluorescent. In contrast, when the bacteria were purged with N(2) to dissip...

2014
Purbasha Sarkar Elena Bosneaga Edgar G. Yap Jyotirmoy Das Wen-Ting Tsai Angelo Cabal Erica Neuhaus Dolonchampa Maji Shailabh Kumar Michael Joo Sergey Yakovlev Roseann Csencsits Zeyun Yu Chandrajit Bajaj Kenneth H. Downing Manfred Auer

Cost-effective production of lignocellulosic biofuel requires efficient breakdown of cell walls present in plant biomass to retrieve the wall polysaccharides for fermentation. In-depth knowledge of plant cell wall composition is therefore essential for improving the fuel production process. The precise spatial three-dimensional (3D) organization of cellulose, hemicellulose, pectin and lignin wi...

Journal: :Zeitschrift fur Naturforschung. C, Journal of biosciences 2014
Jan Burczyk Maria Zych Nikolaos E Ioannidis Kiriakos Kotzabasis

Biotechnology of microalgae represents a very attractive alternative as a source of energy and substances of high value when compared with plant cultivation. Cell walls of green microalgae have an extraordinary chemical and mechanical resistance and may impede some steps in the biotechnological/industrial exploitation of algae. The aim of the present contribution was to check the presence of po...

2006
Notburga Gierlinger Manfred Schwanninger

Confocal Raman microscopy was used to illustrate changes of molecular composition in secondary plant cell wall tissues of poplar wood. Two–dimensional spectral maps were acquired and chemical images calculated by integrating the intensity of characteristic spectral bands. This enabled direct visualization of the spatial variation of the lignin content without any chemical treatment or staining ...

2016
Mariya Ptashnyk Brian Seguin

The microscopic structure and anisotropy of plant cell walls greatly influence the mechanical properties, morphogenesis, and growth of plant cells and tissues. The microscopic structure and properties of cell walls are determined by the orientation and mechanical properties of the cellulose microfibrils and the mechanical properties of the cell wall matrix. Viewing the shape of a plant cell as ...

Journal: :Plant physiology and biochemistry : PPB 2011
Domingos P F Almeida Donald J Huber

Autolysis of cell walls from polygalacturonase (PG)-antisense tomato fruit was studied in a conventional buffer designed to maximize the catalytic activity of PG (30 mM sodium acetate, 150 mM NaCl, pH 4.5), and in solutions mimicking the pH and mineral composition of the fruit apoplast at the mature-green and ripe stages. Autolytic release of uronic acids was very limited under simulated apopla...

Journal: :Journal of bacteriology 1970
G K Best M K Grastie R D McConnell

A determination of the relative affinity of vancomycin and ristocetin for isolated cell walls and for a peptidoglycan precursor was made. These antibiotics had previously been shown to adsorb to cell walls and to complex with peptides containing a d-alanyl-d-alanine C-terminus. By using (14)C-uridine diphosphate (UDP)-N-acetylmuramyl pentapeptide, it was shown that the complex which is formed b...

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