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Página 1 a partir de 30 resultados
Effects of T4 lysozyme release from transgenic potato roots on bacterial rhizosphere communities are negligible relative to natural factors.
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Rhizosphere bacterial communities of two transgenic potato lines which produce T4 lysozyme for protection against bacterial infections were analyzed in comparison to communities of wild-type plants and transgenic controls not harboring the lysozyme gene. Rhizosphere samples were taken from young,
Fungal endophytes in potato roots studied by traditional isolation and cultivation-independent DNA-based methods.
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The composition and relative abundance of endophytic fungi in roots of field-grown transgenic T4-lysozyme producing potatoes and the parental line were assessed by classical isolation from root segments and cultivation-independent techniques to test the hypothesis that endophytic fungi are affected
Phenotypic and genotypic characterization of antagonistic bacteria associated with roots of transgenic and non-transgenic potato plants.
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Rhizobacteria obtained during a risk assessment study from parental and transgenic T4 lysozyme-expressing potato plants were investigated to determine whether or not the strains could be grouped based on the source of isolation, transgenic or non-transgenic plants, respectively. A total of 68
Lysozyme uptake by oxidized starch polymer microgels.
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With the aim of determining suitable conditions for uptake and release of globular proteins on microgels, we studied the interaction between phosphated, highly cross-linked, negatively charged oxidized potato starch polymer (OPSP) microgel particles and lysozyme from hen eggs. Our microgel shows a
Controlled uptake and release of lysozyme from glycerol diglycidyl ether cross-linked oxidized starch microgel.
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A biodegradable microgel system based on glycerol-1,3-diglycidyl ether (GDGE) cross-linked TEMPO-oxidized potato starch polymers was developed for controlled uptake and release of proteins. A series of microgels were prepared with a wide range of charge density and cross-link density. We found both
Stacking of antimicrobial genes in potato transgenic plants confers increased resistance to bacterial and fungal pathogens.
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Solanum tuberosum plants were transformed with three genetic constructions expressing the Nicotiana tabacum AP24 osmotine, Phyllomedusa sauvagii dermaseptin and Gallus gallus lysozyme, and with a double-transgene construction expressing the AP24 and lysozyme sequences. Re-transformation of
Effects of dietary sweet potato leaf meal on the growth, non-specific immune responses, total phenols and antioxidant capacity in channel catfish (Ictalurus punctatus).
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BACKGROUND
Traditional energy sources in catfish diets have become costly, and economical alternatives are needed. Sweet potato leaves are underutilised agricultural by-products that provide energy and substantial amounts of phenols, which affect animal and human health. There is little information
Immune activity of sweet potato (Ipomoea batatas L.) glycoprotein after enzymatic and chemical modifications.
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This study aimed to investigate the immune activity of sweet potato (Ipomoea batatas L.) glycoprotein (SPG-1) before and after enzymatic and chemical modifications. The protein portion of SPG-1 was modified by pepsin, trypsin, and acetylation treatments. The carbohydrate portion was modified by
Purification and characterization of chitin-binding proteins from the hemolymph of sweet potato hornworm, Agrius convolvuli.
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Three chitin-binding proteins (CBPs: CBP9, CBP15, CBP66) were identified from the larval hemolymph of sweet potato hornworm, Agrius convolvuli. Two (CBP9 and CBP15) of them have been isolated and purified by gel filtration (Superdex HR 75), cation-exchange chromatography (Mono S), and reverse-phase
Effect of the incorporation of antimicrobial/antioxidant proteins on the properties of potato starch films.
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Glycerol plasticized potato starch films containing bioactive proteins (lactoferrin (LF) and/or lysozyme (LZ), at 0.1 and 0.2 ratio with respect to starch) were obtained by casting method and characterized as to their microstructural, thermal and physical (water content, mechanical, water and oxygen
Dual Activity of a Viral Lysozyme with High Efficiency for Growth Inhibition of Erwinia amylovora.
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ABSTRACT The lysozyme from Erwinia amylovora phage PhiEa1h was investigated for its ability to inhibit growth of bacteria and compared with the lysozyme from Escherichia coli phage T4. The assays to measure lysozyme activity included cell lysis and growth inhibition of bacteria. Bacterial strains
Increased killing of Bacillus subtilis on the hair roots of transgenic T4 lysozyme-producing potatoes.
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Transgenic potato plants expressing the phage T4 lysozyme gene which are resistant to the plant-pathogenic enterobacterium Erwinia carotovora subsp. carotovora have been constructed. The agricultural growth of these potatoes might have harmful effects on soil microbiota as a result of T4 lysozyme
Effects of plant genotype and growth stage on the structure of bacterial communities associated with potato (Solanum tuberosum L.).
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The effects of genotype, plant growth and experimental factors (soil and year) on potato-associated bacterial communities were studied. Cultivars Achirana Inta, Désirée, Merkur and transgenic Désirée line DL12 (containing T4 lysozyme gene) were assessed in two field experiments. Cross-comparisons
The chemistry of lysozyme and its use as a food preservative and a pharmaceutical.
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The chemistry and use of lysozyme as a food preservative and a pharmaceutical are reviewed. Lysozyme inhibits the growth of deleterious organisms, thus prolonging shelf life. Chemicals used to improve the preservative effect of lysozyme and those that inhibit the enzyme are discussed, along with the
Cell-mediated haemolytic activity of haemolymph from the Colorado potato beetle (Leptinotarsa decemlineata Say.)
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Haemolytic activity was identified in cell-free haemolymph from larval and imago stages of Leptinotarsa decemlineata. The haemolytically active fraction of the haemolymph was active against human, sheep, bull, toad and mouse erythrocytes. There was no haemolysis in the presence of 0.001 M EDTA and
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