Aspergillus spp. are widely spread plant pathogens. In several kinds of fruit, especially in apple and peach, aspergillus rot is one of the postharvest desease in fruit, but the infection mechanism is not known. The degradation of cell walls by pathogens is significant in primary infection and afterinfection, and plays an important role in the advancement of mycelium into the host plant and the...

BREED, R. S., -MURRAY, E. G. D., AND HITCHENS, A. P. 1948 Bergey's miianual of deterininative bacteriology, Ed. 6. The Williams & Wilkins Co., Baltimore, Maryland. ,BU7RRI, R. 1902 Zur Isolierung der Anaeroben. Zentr. Bakteriol. Parasitenk., Abt. II, 8, 534-537. CARRE, M. H. AND HAYNES, D. 1922 The estimation of pectin as calcium pectate and the application of this method to the determination o...

1. The pectic substances of apple have been extracted and separated into a pure pectinic acid and a neutral arabinan-galactan complex by precipitation of the acidic component with ethanol and with cetylpyridinium chloride. 2. The composition of the fractions has been determined. The pectinic acid contained galacturonic acid, arabinose, galactose, rhamnose, xylose and several trace sugars. 3. Tr...

Changes in the composition and structure of cell walls and extracellular polysaccharides (ECP) were studied during the growth of suspension-cultured Arabidopsis thaliana microcalli. Three growth phases, namely the cell division phase, the cell expansion phase, and the stationary phase, were distinguished and associated with a decreasing cell cluster adhesion strength. Degradation of the homogal...

The changes of microorganisms and pectic substances of partially processed carrots (PPC) were determined with respect to cutting direction. The increase of microbial counts occurred in all tissues and both lengthwise cut sections (LCS)and crosswise cut sections (CCS). The microbial count in the xylem of LCS increased at a greater rate than those of phloem at 20•Ž. The counts in both tissues of ...

Indoleacetic acid (IAA) and/or inhibitors of DNA, RNA or protein synthesis were added to the apex of decapitated seedlings of Pisum sativum L. var. Alaska. At various times up to 4 days, enzymic protein was extraoted from a segment of epicotyl immediately below the apex and assayed for its ability to hydrolyse polysaccharides or their derivatives. With the exception of am;ylase, the total amoun...

The partial purification and characterization of cell wall polysaccharides isolated from suspension-cultured Douglas fir (Pseudotsuga menziesii) cells are described. Extraction of isolated cell walls with 1.0 m LiCl solubilized pectic polysaccharides with glycosyl-linkage compositions similar to those of rhamnogalacturonans I and II, pectic polysaccharides isolated from walls of suspension-cult...