Helicoidally arranged layers of cellulose microfibrils in plant cell walls can produce strong and vivid coloration a wide range species. Despite its significance, the morphogenesis walls, whether reflective or not, is not fully understood. Here we show that by optically monitoring reflectance Pollia japonica fruits during development directly map structural changes wall on scale tens nanometres...

Changes in neutral sugar, uronic acid, and protein content of tomato (Lycopersicon esculentum Mill) cell walls during ripening were characterized. The only components to decline in amount were galactose, arabinose, and galacturonic acid. Isolated cell walls of ripening fruit contained a water-soluble polyuronide, possibly a product of in vivo polygalacturonase action. This polyuronide and the o...

374 Structure and function studies of plant cell wall polysaccharides Peter Albersheim*t$§, Jinhua An*, Glenn Freshour*+, Melvin S. Fuller*+, Rafael Guillen*ll, Kyung-Sik Ham*t, Michael G. Hahn*$, ling Huang*, Malcolm O’Neill*, Andrew Whitcornbe*, Myron V. Williams*, William S. York*t and Alan Darvill*t$ *Complex Carbohydrate Research Center, 220 Riverbend Road, +Department of Biochemistry, Lif...

Yeast cell wall matrix particles are composed entirely of beta-glucan and mannoprotein. Alkali-insoluble (1-->3)-beta-D-glucan was extracted from the yeast cell wall by an alkaline-acid method. IR spectra analysis showed that the product was chemically pure glucan, that is to say, it contained no other carbohydrates and proteins. So, the alkaline-acid method was ideal for extracting (1-->3)-bet...

1. The digestibility of the cell wall polysaccharides of an alkane-grown yeast in different parts of the digestive tract of two veal calves fitted with re-entrant cannulas at the end of the ileum was studied by replacing part of the skim-milk powder of their 'normal', milk-substitute (all-milk-protein) diet by yeast (yeast diet). 2. The lactose and glucose of both the all-milk-protein diet and ...

Changes in the polysaccharide composition of Phaseolus vulgaris, P. aureus, and Zea mays cell walls were studied during the first 28 days of seedling development u-sing a gas chromatographic method for the analysis of neutral sugars. Acid hydr4lysis of cell wall material from young tissues liberates rhamnose, fucose, arabinose, xylose, mannose, galacto.se, and glucose which collectively can acc...

Cellulose, a major component of plant cell walls, is made by dynamic complexes that move within the plasma membrane while depositing cellulose directly into the wall. On the other hand, matrix polysaccharides are made in the Golgi and delivered to the wall via secretory vesicles. Several Golgi proteins that are involved in glucomannan and xyloglucan biosynthesis have been identified, including ...

Developing sunflower (Helianthus annuus L.) seeds were analyzed for their fresh and dry weights, water content and wall components viz. low and high molecular weight xyloglucan and pectic polysaccharides. Seeds from two rows (6th and 12th) differing in their final dry weight and position on the capitulum were selected for the investigation. The dry weight of seed from 6th row was 69 mg while th...