The influence of hemicelluloses on the aggregation of cellulose in higher plant cell walls was modelled by adding hemicelluloses to cultures of the cellulose producer Acetobacter xylinum. Characterization of the celluloses by X-ray diffractometry showed them to be more like those that occur in higher plants; the coaggregation of the hemicelluloses suggests their occlusion within and between the...

Bacterial cellulose (BC) is a natural exopolysaccharide characterized by high purity, mechanical strength, and the ability to absorb various compounds. Obtaining BC on an industrial scale expensive, mainly due cost of culture media. Replacing classical media with waste from agri-food industry may be promising way reduce costs when obtaining BC. The aim these studies was compare effectiveness bi...

Four local efficient biofertilizer strains namely, Gluconacetobacter G1 and Azospirillum ACD-15 as nitrogen fixers, Pseudomonas striata phosphorus solubilizing bacterium and a potassium were used in developing NPK consortia. Each consortia consisted of one the two fixing bacteria, phosphate (PSB) (KSB) bacteria five different formulations lignite, kaolinite...

Gluconacetobacter diazotrophicus is an endophyte of sugarcane frequently found in plants grown in agricultural areas where nitrogen fertilizer input is low. Recent results from this laboratory, using mutant strains of G. diazotrophicus unable to fix nitrogen, suggested that there are two beneficial effects of G. diazotrophicus on sugarcane growth: one dependent and one not dependent on nitrogen...

Recombinant cellulose-binding domain (CBD) derived from the cellulolytic bacterium Clostridium cellulovorans was found to modulate the elongation of different plant cells in vitro. In peach (Prunus persica L.) pollen tubes, maximum elongation was observed at 50 &mgr;g mL-1 CBD. Pollen tube staining with calcofluor showed a loss of crystallinity in the tip zone of CBD-treated pollen tubes. At lo...

The endophytic Gram-negative bacterium Gluconacetobacter diazotrophicus SRT4 secretes a constitutively expressed levansucrase (LsdA, EC 2.4.1.10), which converts sucrose into fructooligosaccharides and levan. The enzyme is included in GH (glycoside hydrolase) family 68 of the sequence-based classification of glycosidases. The three-dimensional structure of LsdA has been determined by X-ray crys...

Davis, B. R. (Communicable Disease Center, Atlanta, Ga.), and W. H. Ewing. Lipolytic, pectolytic, and alginolytic activities of Enterobacteriaceae. J. Bacteriol. 88:16-19. 1964.-Of 2,262 cultures of Enterobacteriaceae tested, only cultures of Enterobacter liquefaciens (Aerobacter liquefaciens), Serratia, Proteus vulgaris, and P. mirabilis gave evidence of lipolytic activities. None of the cultu...