partial purification and properties of pectin lyase from penicillium expansum.a pectin lyase, poly(methoxygalacturonide) lyase, ec, from a culture filtrate of penicillium expansum was partially purified 33-fold with 7.3% yield. the enzyme was monomeric with a molecular mass of 36.5 kda. the enzyme did not contain pectate lyase activity and degraded citrus and apple pectin best at ph 7.0 and 40 to 45°c. the k m for citrus pectin was 9 mg ml(-1).199324420203
methanolic extract of plumbago zeylanica - a remarkable antibacterial agent against many human and agricultural pathogens.the current investigation was carried out to determine the cytotoxic and the antimicrobial activities of methanolic extracts of plumbago zeylanica.201728392958
microbiological quality of argentinian paprika.the aim of this study was to evaluate the microbiological quality of paprika produced in catamarca, argentina. microbiological analyses were carried out for the enumeration of total aerobic mesophilic bacteria, coliforms, yeasts and molds, and the detection of salmonella in samples obtained from different local producers during three consecutive years. the mycobiota was identified paying special attention to the mycotoxigenic molds. standard plate counts of aerobic mesophilic bacteria ranged fro ...201728571612
enhanced synthesis of andrographolide by aspergillus niger and penicillium expansum elicitors in cell suspension culture of andrographis paniculata (burm. f.) nees.andrographis paniculata (burm. f.) nees is an important medicinal plant which has enormous applications in pharmaceutical industries. cell suspension culture of andrographis paniculata (burm. f.) nees. was treated with aspergillus niger and penicillium expansum elicitors to enhance the synthesis of andrographolide, the bioactive constituent of a. paniculata.201328510886
synergistic effects of some essential oils against fungal spoilage on pear fruit.the development of natural protective agents as alternatives to chemical fungicides is currently in the spotlight. in the present investigation, chemical composition and antifungal activities of thyme, cinnamon, rosemary and marjoram essential oils (eo), as well as synergism of their possible double and triple combinations were investigated. the compositions of the oils were determined by gc/ms. for determination of antifungal activity against penicillium expansum and botrytis cinerea, a broth m ...201728763743
characterization of boscalid-resistance conferring mutations in the sdhb subunit of respiratory complex ii and impact on fitness and mycotoxin production in penicillium expansum laboratory strains.laboratory mutants of penicillium expansum highly resistant (rfs: 90 to >500, based on ec50s) to succinate dehydrogenase inhibitors (sdhis) were isolated after uv-mutagenesis and selection on media containing boscalid. a positive correlation was found between sensitivity of isolates to boscalid and other sdhis such as isopyrazam and carboxin but not to fungicides affecting other cellular pathways or processes, such as the triazole flusilazole, the phenylpyrrole fludioxonil, the anilinopyrimidine ...201728456312
modelling the effect of water activity reduction by sodium chloride or glycerol on conidial germination and radial growth of filamentous fungi encountered in dairy foods.water activity (aw) is one of the most influential abiotic factors affecting fungal development in foods. the effects of aw reduction on conidial germination and radial growth are generally studied by supplementing culture medium with the non-ionic solute glycerol despite food aw can also depend on the concentration of ionic solutes such as sodium chloride (nacl). the present study aimed at modelling and comparing the effects of aw, either modified using nacl or glycerol, on radial growth and/or ...201728800827
biocontrol agents increase the specific rate of patulin production by penicillium expansum but decrease the disease and total patulin contamination of apples.synthetic fungicides are commonly employed for the control of postharvest diseases of fruits. however, due to health concerns about the use of these chemicals, alternative control methods including biocontrol based on antagonistic yeasts are gaining in popularity. in this study, we investigated the effects of two biocontrol yeasts, rhodotorula mucilaginosa strain 3617 and rhodotorula kratochvilovae strain ls11, on blue mold and patulin (pat) contamination caused by penicillium expansum strains p ...201728713362
assessing the anti-fungal efficiency of filters coated with zinc oxide nanoparticles.air filters support fungal growth, leading to generation of conidia and volatile organic compounds, causing allergies, infections and food spoilage. filters that inhibit fungi are therefore necessary. zinc oxide (zno) nanoparticles have anti-fungal properties and therefore are good candidates for inhibiting growth. two concentrations (0.012 m and 0.12 m) were used to coat two types of filters (melt-blown and needle-punched) for three different periods (0.5, 5 and 50 min). rhizopus stolonifer and ...201728572995
investigating proteome and transcriptome defense response of apples induced by yarrowia lipolytica.a better understanding of the mode of action of postharvest biocontrol agents on fruit surfaces is critical for the advancement of successful implementation of postharvest biocontrol products. this is due to the increasing importance of biological control of postharvest diseases over chemical and other control methods. however, most of the mechanisms involved in biological control remain unknown and need to be explored. yarrowia lipolytica significantly inhibited blue mold decay of apples caused ...201728398122
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