Publications
| Title | Abstract | Year(sorted descending) Filter | PMID Filter |
|---|
| the effect of inoculum size on the growth of penicillium expansum in apples. | penicillium expansum is the most important cause of blue mould rot, a major post-harvest disease of apples worldwide. the objective of this study was to evaluate the effect of the inoculum size on the germination and growth parameters of p. expansum under different storage conditions in apples. growth of p. expansum was observed in more than 90% of the inoculations, when the inoculum was equal or higher than 2x10(4) spores. the use of a low inoculum level resulted in longer lag phases and a larg ... | 2008 | 17993398 |
| characterization of fludioxonil-resistant and pyrimethanil-resistant phenotypes of penicillium expansum from apple. | penicillium expansum is the primary cause of blue mold, a major postharvest disease of apple. fludioxonil and pyrimethanil are two newly registered postharvest fungicides for pome fruit in the united states. to evaluate the potential risk of resistance development in p. expansum to the new postharvest fungicides, one isolate of each of thiabendazole-resistant (tbz-r) and -sensitive (tbz-s) p. expansum was exposed to uv radiation to generate fungicide-resistant mutants. four fludioxonil highly-re ... | 2008 | 18944191 |
| penicillium digitatum suppresses production of hydrogen peroxide in host tissue during infection of citrus fruit. | abstract during the infection of citrus fruit by penicillium digitatum there is little evidence of a host defense response. this suggests that p. digitatum has the ability to suppress host defenses. the current study demonstrates that p. digitatum suppresses a defense-related hydrogen peroxide (h(2)o(2)) burst in host tissue. in contrast, the nonhost pathogen, penicillium expansum, triggers production of a significant amount of h(2)o(2) in citrus fruit exocarp. using laser scanning confocal micr ... | 2007 | 18943520 |
| involvement of gluconic acid and glucose oxidase in the pathogenicity of penicillium expansum in apples. | abstract the contribution of gluconic acid secretion to the colonization of apple tissue by penicillium expansum was analyzed by modulation (increase or decrease) of gluconic acid accumulation at the infection court. p. expansum isolates that express the most gox2 transcripts and concomitant glucose oxidase (gox) activity and that secrete the most gluconic acid cause disease of apple at the fastest rate. cultures grown under reduced oxygen concentration generated fewer gox2 transcripts, produced ... | 2007 | 18943660 |
| purification and application of a lipase from penicillium expansum ped-03. | an extracellular lipase was purified from the fermentation broth of penicillium expansum ped-03 by deae-sepharose chromatography, followed by sephacryl s-200 chromatography. the enzyme was purified 81.8-fold with 19.8% recovery and a specific activity of 85.94 u/mg. the molecular weight of the homogeneous enzyme was about 28 kda, determined by sodium dodecyl sulfate (sds) polyacrylamide gel electrophoresis. the enzymatic resolution of racemic ibuprofen was carried out by the lipase from p. expan ... | 2007 | 18025580 |
| species-specific identification of penicillium linked to patulin contamination. | certain species of penicillium have been reported to produce the mycotoxin patulin, and research was undertaken to identify these with the use of oligonucleotide primer pairs. species examined were found in food, plants, and soil and were reported to produce patulin. penicillium expansum is the most commonly detected species linked to the presence of patulin in apple juice. at least 10 different enzymes are involved in the patulin biosynthetic pathway, including the isoepoxydon dehydrogenase (id ... | 2007 | 18044450 |
| effect of intracellular trehalose in cryptococcus laurentii and exogenous lyoprotectants on its viability and biocontrol efficacy on penicillium expansum in apple fruit. | to improve viability and biocontrol efficacy of cryptococcus laurentii after freeze drying and in subsequent storage. | 2007 | 17397484 |
| effect of yeast antagonist in combination with heat treatment on postharvest blue mold decay and rhizopus decay of peaches. | the potential of using heat treatment alone or in combination with an antagonistic yeast for the control of blue mold decay and rhizopus decay of peaches caused by penicillium expansum and rhizopus stolonifer respectively, and in reducing natural decay development of peach fruits, as well as its effects on postharvest quality of fruit was investigated. in vitro tests, spore germination of pathogens in pdb was greatly controlled by the heat treatment of 37 degrees c for 2 d. in vivo test to contr ... | 2007 | 17140691 |
| crucial role of antioxidant proteins and hydrolytic enzymes in pathogenicity of penicillium expansum: analysis based on proteomics approach. | penicillium expansum, a widespread filamentous fungus, is a major causative agent of fruit decay and may lead to the production of mycotoxin that causes harmful effects on human health. in this study, we compared the cellular and extracellular proteomes of p. expansum in the absence and presence of borate, which affects the virulence of the fungal pathogen. the differentially expressed proteins were identified using esi-q-tof-ms/ms. several proteins related to stress response (glutathione s-tran ... | 2007 | 17194899 |
| patulin accumulation in apples by penicillium expansum during postharvest stages. | the aim of this study was to assess the opportunities of penicillium expansum to develop and produce patulin in apples during cold storage and in the steps prior to processing of apple products. | 2007 | 17209811 |
| production, formulation and antagonistic activity of the biocontrol like-yeast aureobasidium pullulans against penicillium expansum. | aureobasidium pullulans (de bary) arnaud (ach 1-1) was grown in a glucose fed-batch fermentor to 106 g dry wt l(-1) in 48 h. the cells were dried in a fluidized bed dryer with a final viability of 62%. after 7 months at 4 degrees c, the viability was 28% of the initial value (= 2.3 x 10(10 )c.f.u. g(-1) dry matter). a protection level of 89% was achieved with the biomass preparation at 1 x 10(8 )c.f.u. ml(-1) after 28 and 7 days for apples stored respectively at 5 and 25 degrees c against penici ... | 2007 | 17216301 |
| microbial quality and presence of moulds in kuflu cheese. | the chemical and microbial qualities, including fungal flora, of 30 samples of kuflu cheese randomly purchased from different markets in turkey were investigated. the gross composition of the cheese samples ranged between 37.65-53.65% moisture, 6.21-40.09% fat-in-dry matter, 4.70-10.07% salt-in-moisture and 26.18-44.85% protein. the mean ph value of the cheeses was 6.29+/-0.28 and ph values ranged from 5.52 to 7.22. variations between the samples in terms of their gross composition suggested a l ... | 2007 | 17258341 |
| indole-3-acetic acid enhances the biocontrol of penicillium expansum and botrytis cinerea on pear fruit by cryptococcus laurentii. | this study evaluated the efficacy of indole-3-acetic acid (iaa) alone or with a biocontrol yeast, cryptococcus laurentii, in the inhibition of blue and gray mold diseases (penicillium expansum and botrytis cinerea) on pear fruit. the results demonstrated that a combination of c. laurentii with iaa at 100 microg ml(-1) was more effective in suppressing blue and gray mold infections on pear fruit than application of c. laurentii alone. iaa alone or with c. laurentii stimulated catalase, peroxidase ... | 2007 | 17286561 |
| cold and ambient deck storage prior to processing as a critical control point for patulin accumulation. | patulin, a mycotoxin produced primarily by penicillium expansum, is currently of great concern because of its undesirable effects in human health. it has been proven that patulin can damage organs and tissues in animals and some studies revealed carcinogenic and teratogenic effects. patulin is found mainly in low quality apples diverted to production of apple by-products. apples from cold storage or recently harvested (usually ground harvested or low quality apples) are stored under ambient cond ... | 2007 | 17341435 |
| proteome approach to characterize proteins induced by antagonist yeast and salicylic acid in peach fruit. | proteins induced by antagonist yeast pichia membranefaciens and salicylic acid (sa) in peach fruit were determined using proteome analysis in this study. both the yeast and sa enhanced the resistance of peach fruit and delayed the initiation infection of penicillium expansum. when quadrupole time-of-flight tandem mass spectrometer was used, a total of 25 proteins could be identified as significantly up- or down-regulated in response to at least one activitor. according to the function, these pro ... | 2007 | 17381148 |
| biocontrol of blue and gray mold diseases of pear fruit by integration of antagonistic yeast with salicylic acid. | this study was conducted to evaluate the efficacy of the biocontrol yeast cryptococcus laurentii and salicylic acid (sa) in suppressing the blue and gray mould rots in pear fruit and to explore possible mode of action involved. our results showed that the combined treatment of pear fruit with c. laurentii with sa at 100 microg ml(-1) resulted in a remarkably improved control of penicillium expansum and botrytis cinerea infections, including the pre-inoculated p. expansum, in comparison with the ... | 2007 | 17428566 |
| prediction of penicillium expansum spoilage and patulin concentration in apples used for apple juice production by electronic nose analysis. | classification models for penicillium expansum spoilage of apples and prediction models for patulin concentration in apples usable for apple juice production were made on the basis of electronic nose (e-nose) analysis correlated to hplc quantification of patulin. a total of 15 golden delicious and 4 jonagold apples were surface sterilized and divided into three groups per variety. the golden delicious group consisted of five apples each. group 1 was untreated control, group 2 was surface inocula ... | 2007 | 17458978 |
| a microarray for monitoring the production of mycotoxins in food. | a microarray, which covers most of the known relevant mycotoxin biosynthesis genes, has been developed. the microarray carries oligonucleotides of the fumonisin, the aflatoxin, the ochratoxin, the trichothecene (type a and b) and the patulin biosynthesis pathways. for trichothecene producing fusaria the biosynthesis cluster of trichothecene producing fusarium sporotrichioides (type a) and of gibberrella zeae (type b, teleomorph of f. graminearum) have been spotted. the aflatoxin cluster carries ... | 2007 | 17512074 |
| impact of the botrytis cinerea strain and metabolism on (-)-geosmin production by penicillium expansum in grape juice. | geosmin, an off-flavour of some rotten grapes, has been implicated in wine defects. botrytis cinerea and penicillium expansum were the most common among the numerous microorganisms isolated from rotten grapes. p. expansum produces geosmin on model media but not healthy grape juice. however, geosmin synthesis by p. expansum was demonstrated in grape juice and on crushed grapes that had been pre-cultured with certain b. cinerea strains. 34 out of 156 b. cinerea strains ([bot +] phenotype) isolated ... | 2007 | 17562219 |
| microbial toxicity of pesticide derivatives produced with uv-photodegradation. | our study aimed at acquiring information about the biological effect of pesticides and their degradates produced by uv-treatment on microbiological activity. five photosensitive pesticides (carbendazim, acetochlor, simazine, chlorpyrifos, eptc) and six representative soil microbes (bacillus subtilis, pseudomonas fluorescens, mycobacterium phlei, fusarium oxysporum, penicillium expansum, trichoderma harzianum) were applied throughout our model experiments. the antimicrobial effects of the pestici ... | 2007 | 17639315 |
| enhanced activity of strobilurin and fludioxonil by using berberine and phenolic compounds to target fungal antioxidative stress response. | identify natural products that effectively target antioxidative signal transduction/stress response systems [i.e., mitogen-activated protein kinase (mapk) pathway, mitochondrial superoxide dismutase (mn-sod)] of fungi. enhance activity of strobilurin or fludioxonil with discovered compounds. | 2007 | 17651208 |
| modeling the effect of temperature on the growth rate and lag phase of penicillium expansum in apples. | the objective of the present study was to develop validated models that describe the effect of storage temperature on the growth rate and lag phase of six penicillium expansum strains. the growth of the selected strains was therefore studied on apple puree agar medium (apam) at 30, 25, 16, 10, 4 and 2 degrees c. growth rates and lag phases were estimated using linear regression. several secondary models were evaluated and for the growth rate, a modification of the extended ratkowsky model was se ... | 2007 | 17698233 |
| [rapid improvement of lipase production in penicillium expansum by genome shuffling]. | in the present study, the genome shuffling was used to improve lipase production of penicillium expansum. a lipase producing mutant strain-penicillium expansum fs8486 and a wild type of aspergillus tamarii fs-132 isolated from soil of a volcano in xinjiang were used as the parental strains. after two rounds of genome shuffling, several elite daughter strains were screened. the lipase activity in one of the daughter strains was increased 317% over the starting strain fs8486. comparisons of the mo ... | 2007 | 17822042 |
| [improvement of the the thermostability of penicillium expansum lipase by mutagenesis the random mutant ep8 at k55r]. | in order to improve the thermostability of the penicillium expansum lipase (pel), the lipase encoding genes was mutated by site-directed mutagenesis. a recombinant vector pao815-ep8-k55r which contain double mutant genes was constructed by overlap extension pcr using the cdna of a random-mutant lipase ep8 (a single site mutant) as the template and two special primers were used to generate another mutation site k55r. the recombinant vector was transformed into pichia pastoris gs115 by electropora ... | 2007 | 17822043 |
| influence of storage conditions of apples on growth and patulin production by penicillium expansum. | penicillium expansum causes blue mould rot, a serious post-harvest disease of apples, and is the main producer of the mycotoxin patulin. the present study aimed to determine the influence of storage conditions (i.e. temperature and o(2) level) on growth and patulin production by different p. expansum strains on a simulation medium and on apples. growth was strongly influenced by the temperature, while the used atmosphere (20, 3, and 1% o(2); <1% co(2)) had no effect. optimal growth was observed ... | 2007 | 17900726 |
| the implication of xyloglucan endotransglucosylase/hydrolase (xths) in tomato fruit infection by penicillium expansum link. a. | in general, cell wall-degrading enzymes produced by plant pathogenic fungi are considered important pathogenicity factors. in this work, we evaluate the implication of xyloglucan endotransglucosylase/hydrolase (xths), a potential hemicellulosic repairing enzyme, in the infection mechanism process by the fungus. this study investigated the slxths expresion and xyloglucan endotransglucosylase (xet) activity during infection of two tomato fruit cultivars by penicillium expansum link. a. in infected ... | 2007 | 17960871 |
| biological control of postharvest spoilage caused by penicillium expansum and botrytis cinerea in apple by using the bacterium rahnella aquatilis. | the epiphytic bacterium rahnella aquatilis, isolated from fruit and leaves of apples, was tested for antagonistic properties against penicillium expansum and botrytis cinerea on red delicious apple fruit. in "in vitro" assays, this bacterium inhibited completely the germination of p. expansum and b. cinerea spores, but it needed direct contact with the spores to do it. however the putative mechanism seemed be different for the two pathogens. the bacterium did not produce extracellular antibiotic ... | 2007 | 17007950 |
| the sequence of the isoepoxydon dehydrogenase gene of the patulin biosynthetic pathway in penicillium species. | interest in species of the genus penicillium is related to their ability to produce the mycotoxin patulin and to cause spoilage of fruit products worldwide. the sequence of the isoepoxydon dehydrogenase (idh) gene, a gene in the patulin biosynthetic pathway, was determined for 28 strains representing 12 different penicillium species known to produce the mycotoxin patulin. isolates of penicillium carneum, penicillium clavigerum, penicillium concentricum, penicillium coprobium, penicillium dipodom ... | 2007 | 17043910 |
| synergistic effect of chitosan and cryptococcus laurentii on inhibition of penicillium expansum infections. | this study was conducted to determine the efficacy of chitosan at different concentrations with various intrinsic viscosities alone, and in its combination with a yeast antagonist cryptococcus laurentii in reducing the blue mold rot caused by penicillium expansum in apple fruit. the results indicated that application of chitosan alone was effective in inhibiting the blue mold rot in apple fruit wounds, especially with the high concentrations and low viscosities. but its efficacy was declining wi ... | 2007 | 17107729 |
| patulin distribution in fuji and golden apples contaminated with penicillium expansum. | this work assesses the extent of patulin contamination in penicillium expansum-infected apples stored at room temperature for short periods of time and its relationship with apple variety (golden or fuji), degree of ripeness and size of lesions. inoculated apples were incubated at 20 degrees c. patulin was determined in both sound and decayed tissue from cylindrical samples taken around the lesions and cut into 0.5-cm thick sections. higher accumulation of patulin occurred in golden apples, with ... | 2006 | 17118875 |
| efficacy of candida sake cpa-1 formulation for controlling penicillium expansum decay on pome fruit from different mediterranean regions. | the effectiveness of a formulated product of the yeast candida sake cpa-1 for controlling postharvest diseases on pome fruits was demonstrated in laboratory, semicommercial, and commercial trials carried out in the major pome fruit producing region of the european union. first, one wettable powder and seven liquid formulations were tested in laboratory trials that involved two varieties of apples and two varieties of pears. in all cases, an efficacy similar to that of fresh cells was demonstrate ... | 2006 | 17133815 |
| activity of trans-2-hexenal against penicillium expansum in 'conference' pears. | to investigate the effects of trans-2-hexenal on blue mould disease, patulin content and fruit quality in 'conference' pears. | 2006 | 16696666 |
| effect of lipase immobilization on resolution of (r, s)-2-octanol in nonaqueous media using modified ultrastable-y molecular sieve as support. | the lipase from penicillium expansum ped-03 (pel) was immobilized onto modified ultrastable-y (usy) molecular sieve and the resolution of (r, s)- 2-octanol was carried out in a bioreactor in nonaqueous media by the immobilized lipase. it was found that the conversion rate, enantiomeric excess (ee) value, and enantioselectivity (e) value of the resolution catalyzed by pel immobilized on modified usy molecular sieve were much higher than those of the reaction catalyzed by free pel and pel immobili ... | 2006 | 16891665 |
| susceptibility of penicillium expansum spores to sodium hypochlorite, electrolyzed oxidizing water, and chlorine dioxide solutions modified with nonionic surfactants. | the use of water flotation tanks during apple packing increases the risk of contamination of apples by spores of penicillium expansum, which may accumulate in the recirculating water. routine addition of sanitizers to the water may prevent such contamination. sodium hypochlorite (naocl), chlorine dioxide (clo2), and electrolyzed oxidizing (eo) water have varied activity against spores of p. expansum, and their effectiveness could be enhanced using surfactants. the objective of this study was to ... | 2006 | 16924921 |
| byssochlamys nivea with patulin-producing capability has an isoepoxydon dehydrogenase gene (idh) with sequence homology to penicillium expansum and p. griseofulvum. | nucleotide sequences of the isoepoxydon dehydrogenase gene (idh) for eight strains of byssochlamys nivea were determined by constructing genomewalker libraries. a striking finding was that all eight strains of b. nivea examined had identical nucleotide sequences, including those of the two introns present. the length of intron 2 was nearly three times the size of introns in strains of penicillium expansum and p. griseofulvum, but intron 1 was comparable in size to the number of nucleotides prese ... | 2006 | 16934966 |
| a caps test allowing a rapid distinction of penicillium expansum among fungal species collected on grape berries, inferred from the sequence and secondary structure of the mitochondrial ssu-rrna. | penicillium expansum is a fungal species highly damageable for the postharvest conservation of numerous fruits. in vineyards, this fungus is sometimes isolated from grape berries where its presence may lead to the production of geosmin, a powerful earthy odorant, which can impair grapes and wines aromas. however, the discrimination of p. expansum from related fungi is difficult because it is based on ambiguous phenotypic characters and/or expensive and time-consuming molecular tests. in this con ... | 2006 | 16935376 |
| antifungal activity of tio2 photocatalysis against penicillium expansum in vitro and in fruit tests. | the antifungal activity of tio2 photocatalytic reaction in the form of tio2 powder and tio2 coated on a plastic film against penicillium expansum was investigated in vitro and in fruit tests. the mixture of p. expansum conidial suspension and tio2 powder was added to potato dextrose agar (pda) plates for vitro test. the tio2 photocatalytic reaction reduced conidial germination of the fungal pathogen. it was found that the ability of the tio2 photocatalytic reaction to suppress p. expansum growth ... | 2006 | 16269195 |
| cloning and molecular characterization of penicillium expansum genes upregulated under conditions permissive for patulin biosynthesis. | penicillium expansum is commonly associated with patulin production in pomaceous fruits. both the full-length isoepoxydon dehydrogenase (idh) gene and a 470 bp fragment of the 6-methylsalicylic acid synthase (6-msas) gene have been cloned from p. expansum. in addition, we cloned a 715 bp fragment of a putative atp-binding cassette transporter gene peab1, together with part of two putative cytochrome p450 monooxygenase genes p-450 1 and p-450 2. increased expression of all five genes was observed ... | 2006 | 16436057 |
| protein splicing of prp8 mini-inteins from species of the genus penicillium. | inteins are protein-intervening sequences found inside the coding region of different host proteins and are translated in-frame with them. they can self-excise through protein splicing, which ligates the host protein flanks with a peptide bond. in this study, four different species of the genus penicillium were investigated for the presence of inteins inside the conserved splicing-factor protein prp8. we identified 157 to 162 amino acid in-frame insertions in the prp8 protein of penicillium chry ... | 2006 | 16544141 |
| effects of trehalose on stress tolerance and biocontrol efficacy of cryptococcus laurentii. | to investigate the effects of internal trehalose on viability and biocontrol efficacy of antagonistic yeast cryptococcus laurentii under stresses of low temperature (lt), controlled atmosphere (ca) and freeze drying. | 2006 | 16553742 |
| the isoepoxydon dehydrogenase gene of the patulin metabolic pathway differs for penicillium griseofulvum and penicillium expansum. | purified dna from isolates of penicillium griseofulvum and p. expansum was used as a template to amplify a 600-bp fragment of the isoepoxydon dehydrogenase (idh) gene of the patulin biosynthetic pathway. primer pairs designed from the p. griseofulvum gene to amplify specific regions of the idh gene yielded similar-sized bands for all strains. asymmetrical amplification produced dna products for sequencing and dna sequences were translated to produce the corresponding amino acid sequences. after ... | 2006 | 16328863 |
| aureobasidium pullulansas a biocontrol agent of blue mold in "rocha" pear. | the blue mold of "rocha" pear caused by penicillium expansum is an important postharvest disease which is adequately controlled by application of synthetic fungicides. in recent years, strategies like biological control have been considered a desirable alternative to chemicals. several studies have demonstrated the potential of the yeast-like fungus aureobasidium pullulans for control of postharvest decay of pear. a portuguese isolate of aureobasidium pullulans was characterized and evaluated fo ... | 2006 | 17390846 |
| biocontrol of blue mold on apple fruits by aureobasidium pullulans (strain ach 1-1): in vitro and in situ evidence for the possible involvement of competition for nutrients. | aureobasidium pullulans strain ach1-1 was recently isolated for its biocontrol effectiveness against penicillium expansum, the causal agent of blue mold on harvested apples. in the present study, strain ach1-1 was found to be very effective in controlling p. expansum on apple wounds. for in vitro tests, strain ach1-1 and p. expansum were cocultured in the presence of apple juice (0 - 5%) using a system preventing direct contact between both agents. the presence of the antagonist greatly reduced ... | 2006 | 17390872 |
| effect of incubation temperature and relative humidity on lesion diameter of botrytis cinerea pers. and penicillium expansum link. on apple fruits. | previous studies carried out in our laboratory demonstrated that the growth of b. cinerea and p. expansum was highly influenced by water activity and temperature in 'in vitro' conditions. regardless the temperature, a, minimal for growth was < or = 0.89 and equal to 0.89 for p. expansum and b. cinerea respectively. the effect of incubation temperature (5-25 degrees c) and relative humidity (rh 75-98%) on the lesion diameter of two common fungi b. cinerea and p. expansum was studied and modelled ... | 2006 | 17390873 |
| effect of the biocontrol yeast rhodotorula glutinis strain ls11 on patulin accumulation in stored apples. | abstract contamination of apples (malus domestica) and derived juices with fungicide residues and patulin produced by penicillium expansum are major issues of food safety. biocontrol agents represent an alternative or supplement to chemicals for disease control. our data show that these microbes could also contribute to actively decreasing patulin accumulation in apples. three biocontrol agents, rhodotorula glutinis ls11, cryptococcus laurentii ls28, and aureobasidium pullulans ls30, were examin ... | 2005 | 18943357 |
| enhancement of biocontrol activity of cryptococcus laurentii by silicon and the possible mechanisms involved. | abstract exogenous application of silicon (si) in the form of sodium metasilicate reduced disease development caused by penicillium expansum and monilinia fructicola in sweet cherry fruit at 20 degrees c. the inhibition of fruit decay was correlated closely with si concentrations. silicon at concentrations of 1%, in combination with the biocontrol agent cryptococcus laurentii at 1 x 10(7) cells per ml, provided synergistic effects against both diseases. population dynamics of c. laurentii were s ... | 2005 | 18943838 |
| development of real-time pcr using minor groove binding probe to monitor the biological control agent candida oleophila (strain o). | a real-time pcr assay using a 3'-minor groove binding (mgb) probe was developed for specific detection and monitoring of candida oleophila (strain o), a biocontrol agent against botrytis cinerea and penicillium expansum, on harvested apples. the application of the rapd technique on c. oleophila strains followed by reproducible sequence characterized amplified region (scar) amplifications allowed the identification of a semi-specific fragment of 244 bp, observed in the profiles of strain o and th ... | 2005 | 15567227 |
| metabiotic associations of molds and salmonella poona on intact and wounded cantaloupe rind. | salmonella poona, a serotype rarely implicated in human infections, has recently caused several cantaloupe-associated outbreaks of salmonellosis. metabiotic associations of molds and foodborne pathogens on produce have been reported. we tested proteolytic activity and measured changes in the ph of cantaloupe rind caused by growth of alternaria alternata, cladosporium cladosporioides, epicoccum nigrum, geotrichum candidum, and penicillium expansum. survival and growth characteristics of salmonell ... | 2005 | 15582743 |
| osmotically induced trehalose and glycine betaine accumulation improves tolerance to desiccation, survival and efficacy of the postharvest biocontrol agent pantoea agglomerans eps125. | the application of the biocontrol agent pantoea agglomerans eps125 to unwounded fruits was practically ineffective for control of postharvest blue mould caused by penicillium expansum when the treatment and subsequent wounding and pathogen inoculation were separated by periods of unfavourable conditions. this was due to a rapid decrease in viability of the alocthonous introduced biocontrol agent in the intact peel surface. a system for osmoadaptation of the biocontrol agent was developed by comb ... | 2005 | 16002241 |
| epidemiology of mycotoxigenic fungi associated with fusarium ear blight and apple blue mould: a review. | research on the epidemiology of plant diseases is briefly reviewed, focusing on two diseases caused by mycotoxin-producing pathogens: fusarium ear (or head) blight (feb or fhb) of small grain cereals and apple blue mould (penicillium expansum). pathogen development during its key life cycles is discussed in relation to important environmental factors and host resistance. current control methods are also reviewed, focusing on cultural and biological methods. the future challenge is to understand ... | 2005 | 16019798 |
| infection of cantaloupe rind with cladosporium cladosporioides and penicillium expansum, and associated migration of salmonella poona into edible tissues. | a study was undertaken to determine if the growth of two phytopathogens, cladosporium cladosporioides and penicillium expansum, in wounds on cantaloupe rinds facilitates migration of salmonella poona into subsurface mesocarp tissues. wounded sites in cantaloupe rind were inoculated with s. poona only, s. poona and mold simultaneously, or mold followed by s. poona 3 days later. a cylindrical plug (ca. 3 cm diameter and 4 cm deep) of inoculated tissue extending from the rind surface into edible ti ... | 2005 | 16023237 |
| enhanced production of penicillium expansum ped-03 lipase through control of culture conditions and application of the crude enzyme in kinetic resolution of racemic allethrolone. | alkaline lipase production was performed in submerged fermentation by penicillium expansum ped-03. it was found that the suitable carbon source and nitrogen source for lipase production were 0.5% starch and 4.0% soybean meal, respectively. the maximal lipase activity (850 u/ml) of production was achieved at initial ph 5.5-6.0, 26 degrees c, 72 h. tween-80 was an effective enhancer for lipase production. agitation speed of the fermentor played an important role, and the suitable agitation speed f ... | 2005 | 16080697 |
| origin of (-)-geosmin on grapes: on the complementary action of two fungi, botrytis cinerea and penicillium expansum. | one of the consequences of rot on grapes is the development of volatile compounds giving fungal, mouldy or earthy odours. among these compounds, (-)-geosmin (trans-1,10-dimethyl-trans-9-decalol), a powerful aromatic compound with an earthy smell is a persistent defect in grape juice and wines made with at least partially rotten grapes. a microbiota analysis of rotten grapes containing (-)-geosmin was carried out on sites from four french regions from 1999 to 2002, to clarify the involvement in g ... | 2005 | 16096689 |
| purification and preliminary crystallographic analysis of a penicillium expansum lipase. | pf898 is a strain of penicillium expansum optimized for the high level production of penicillium expansum lipase (pel). this pel is unique compared with other lipases in several aspects, for example, the pel shows low sequence identities (<30%) to all other known lipases, and high percentage of hydrophobic residues in the n-terminal region. the pel was purified to homogeneity and shown to be 28 kda by sds-page. crystals suitable for x-ray diffraction analysis were obtained by the sitting-drop me ... | 2005 | 16112629 |
| biological control of apple blue mold with pseudomonas fluorescens. | pseudomonas fluorescens isolate 1100-6 was evaluated as a potential biological control agent for apple blue mold caused by penicillium expansum or penicillium solitum. both the wild-type isolate 1100-6 and a genetically modified derivative labeled with the gene encoding the green fluorescent protein (gfp) were compared. the p. fluorescens isolates with or without gfp equally reduced the growth of penicillium spp. and produced large zones of inhibition in dual culture plate assays. cell-free meta ... | 2005 | 16175208 |
| integration of biocontrol agents and food-grade additives for enhancing protection of stored apples from penicillium expansum. | forty-nine compounds currently used as additives in foods were tested in combination with three biocontrol agents, the yeasts rhodotorula glutinis, cryptococcus laurentii, and the yeastlike fungus aureobasidium pullulans, to increase their antagonistic activity against penicillium expansum, the causal agent of blue mold on apples. twelve additives dramatically improved the antagonistic activity of one or more of the tested biocontrol agents. in a two-way factorial experiment with these selected ... | 2005 | 16245713 |
| development of a biological control method against postharvest diseases of citrus fruits. | candida oleophila strain o was previously selected for its high and reliable antagonistic activity against botrytis cinerea and penicillium expansum, two important wound pathogens on post-harvest apples. the application of these antagonistic strains on wound pathogens of citrus was more recently undertaken. the efficacy of yeast (applied at several concentrations from 10(5) to 10(8) cfu/ml) was assessed against p. digitatum and p. italicum inoculated after one hours (at a concentration of 10(5), ... | 2005 | 16637158 |
| a new post-harvest fungicide to control fruit rot on apple and pear. | philabuster is a new post-harvest fungicide developed by janssen pharmaceutica n.v.. it provides an advanced mould control by post-harvest treatments of citrus and pome fruit. the product is formulated as a stable suspension concentrate intended for dilution in water before use. philabuster 400 sc contains 200 g/l imazalil and 200 g/l pyrimethanil. both active ingredients have a different single site mode of action. imazalil inhibits ergosterol biosynthesis (dmi), whereas pyrimethanil interferes ... | 2005 | 16637162 |
| selection of antagonists of postharvest apple parasites: penicillium expansum and botrytis cinerea. | the objectives of this study were to constitute a collection of pathogenic agents of economic importance which cause losses of apple fruits after harvest namely botrytis cinerea and penicillium expansum and to select in vivo efficient antagonistic strains able to protect fruits against both pathogens at 5 degrees c (p. expansum) and 25 degrees c (p. expansum & b. cinerea). twenty strains of p. expansum and ten strains of b. cinerea have been isolated from infected apple fruits. potential antagon ... | 2005 | 16637169 |
| micromycetes, producers of toxins, detected on stored vegetables. | in 2003-2004, investigations of mycological contamination of stored and newly harvested vegetables were carried out. the aim of the study was to detect fungal species able to synthesize toxic metabolites, which are spread on vegetables under various conditions. for mycological investigations, samples of carrots, onions and cabbage were taken from storehouses with different storage periods and conditions. penicillium expansum, p. nalgiovense, mucor silvaticus and penicillium verrucosum were more ... | 2005 | 16457482 |
| characterization of intact penicillium spores by matrix-assisted laser desorption/ionization mass spectrometry. | the fungal spores of penicillium expansum, p. chrysogenum, p. citrinum, p. digitatum, p. italicum, and p. pinophilum were characterized by using matrix-assisted laser desorption/ionization with time-of-flight mass spectrometry (maldi-tofms). these fungal spores are frequently found in grain and fruit. the mass spectra of these six species were directly obtained from the intact spores without any pretreatment. the results obtained indicate that 2,5-dihydroxybenzoic acid and sinapinic acid are sui ... | 2005 | 16276495 |
| antifungal activity of limonoids from khaya ivorensis. | chemical investigation of the diethyl ether extract of the stem bark of khaya ivorensis a chev (meliaceae) afforded ten limonoids of angolensates, ring d-opened limonoids and mexicanolides. the structures of the limonoids isolated were determined by comparison of their (1)h and (13)c nmr data with those reported in the literature. these compounds were evaluated for their antifungal activity against the plant pathogenic fungus botrytis cinerea pers. methyl 6-hydroxyangolensate and 3,7-dideacetylk ... | 2005 | 15619711 |
| control of blue mold (penicillium expansum) by fludioxonil in apples (cv empire) under controlled atmosphere and cold storage conditions. | a reduced risk fungicide, fludioxonil, was tested for its efficacy against blue mold caused by thiabendazole-resistant and -sensitive penicillium expansum (link) thom in apples under three storage conditions. in a co-treatment, fludioxonil and inoculum were applied together to test the protective activity of the fungicide on wounds that had been aged for 1 or 2 days. the fungicide was also tested for its curative activity in post-inoculation treatment on apples that had been inoculated for 1 or ... | 2005 | 15662721 |
| evaluation of several culture media for production of patulin by penicillium species. | the aim of this study was to evaluate different species of penicillium to identify those which have the potential to produce the greatest amount of the mycotoxin, patulin. additionally, six different culture media were compared to determine maximum patulin production. eleven different strains of penicillium species were selected because they had previously been reported to be producers of patulin. the strains included penicillium expansum, penicillium griseofulvum (formerly penicillium urticae), ... | 2005 | 15698685 |
| mycological survey of ripped service tree fruits (sorbus domestica l.) with an emphasis on toxinogenic fungi. | to investigate a possible incidence of microscopic fungi in ripped service tree (sorbus domestica l.) fruits, a mycological survey was carried out during october-november 2003 in slovakia. this rare kind of fruit is renowned for its significant curative actions in various human and animal diseases. the study revealed that all 24 surface sterilized fruits analysed were contaminated with fungi. the most dominant endogenous contaminant encountered was cladosporium cladosporioides (fres.) de vries f ... | 2005 | 15734569 |
| effects of a biocontrol agent and methyl jasmonate on postharvest diseases of peach fruit and the possible mechanisms involved. | to investigate effects of application of 200 micromol l(-1) methyl jasmonate [meja (200)] and cryptococcus laurentii alone or in combination against postharvest diseases (monilinia fructicola and penicillium expansum) in peach fruit stored at 25 and 0 degrees c, and to evaluate the possible mechanisms involved. | 2005 | 15752341 |
| synergistic effects of combining biocontrol agents with silicon against postharvest diseases of jujube fruit. | the synergistic effects of biocontrol yeasts cryptococcus laurentii and rhodotorula glutinis combined with silicon (si) against alternaria alternata and penicillium expansum molds were investigated in jujube fruit (chinese date, zizyphus jujuba) stored at 20 and 0 degrees c, respectively. combinations of c. laurentii and r. glutinis at 5 x 10(7) cells/ml with 2% si was most effective in controlling the diseases caused by a. alternata and p. expansum on jujube fruit stored at 20 degrees c. when f ... | 2005 | 15771180 |
| identification of fungal contamination and determination of mycotoxigenic molds by micellar electrokinetic capillary chromatography in smoked paprika. | the purpose of this work was to analyze the fungal contamination in smoked and unsmoked paprika processed from different cultivars of pepper and to investigate the ability of these and other mycotoxigenic molds to grow and synthesize mycotoxins in smoked paprika. eighteen mycotoxins were evaluated using micellar electrokinetic capillary chromatography. no relevant differences were found in fungal contamination between smoked and unsmoked paprika. the number of yeasts obtained was low, ranging fr ... | 2005 | 15830676 |
| physicochemical properties and bioactivity of fungal chitin and chitosan. | chitinous material was extracted from mycelia of aspergillus niger and mucor rouxii grown in yeast peptone dextrose broth for 15 and 21 days, respectively. the extracted material was characterized for purity, degree of acetylation, and crystallinity and tested for antibacterial and eliciting properties. the maximum glucosamine level determined in the mycelium of a. niger was 11.10% dw and in the mycelium of m. rouxii was 20.13% dw. on the basis of the stepwise extraction of freeze-dried mycelia, ... | 2005 | 15884813 |
| studying and modelling the combined effect of temperature and water activity on the growth rate of p. expansum. | the effect of solutes, water activity (a(w), 0.890--0.980) and temperature (5--25 degrees c) on the mycelial growth rate of penicillium expansum was evaluated. the growth rate dropped as the temperature and a(w) of the medium decreased. nacl was the solute causing the greatest growth rate reduction, followed by glucose, glycerol and sorbitol. statistical analysis of the results showed a significant effect of solute, a(w), temperature and combinations of two or three of these factors (p<0.0001). ... | 2005 | 15885834 |
| sodium bicarbonate enhances biocontrol efficacy of yeasts on fungal spoilage of pears. | the addition of 2% (w/v) sodium bicarbonate (sbc) in the suspensions of antagonistic yeast cryptococcus laurentii or trichosporon pullulans significantly limited spore germination and germ tube elongation of penicillium expansum and alternaria alternata in potato dextrose broth (pdb) medium. biocontrol activity of c. laurentii or t. pullulans against postharvest decay caused by p. expansum and a. alternata in pear fruits was significantly increased when c. laurentii or t. pullulans combined with ... | 2004 | 15163586 |
| evaluation of nostoc strain atcc 53789 as a potential source of natural pesticides. | the cyanobacterium nostoc strain atcc 53789, a known cryptophycin producer, was tested for its potential as a source of natural pesticides. the antibacterial, antifungal, insecticidal, nematocidal, and cytotoxic activities of methanolic extracts of the cyanobacterium were evaluated. among the target organisms, nine fungi (armillaria sp., fusarium oxysporum f. sp. melonis, penicillium expansum, phytophthora cambivora, p. cinnamomi, rhizoctonia solani, rosellinia, sp., sclerotinia sclerotiorum, an ... | 2004 | 15184126 |
| characterization of tomato endo-beta-1,4-glucanase cel1 protein in fruit during ripening and after fungal infection. | the tomato (lycopersicon esculentum mill.) endo-beta-1,4-glucanase (egase) cel1 protein was characterized in fruit using specific antibodies. two polypeptides ranging between 51 and 52 kda were detected in the pericarp, and polypeptides ranging between 49 and 51 kda were detected in locules. the polypeptides recognized by cel1 antiserum in fruit are within the size range predicted for cel1 protein and could be derived from heterogeneous glycosylation. cel1 protein accumulation was examined throu ... | 2004 | 15243740 |
| a new antifungal metabolite from penicillium expansum. | a new antifungal compound, (3s)-4,6-dihydro-8-methoxy-3,5-dimethyl-6-oxo-3h-2-benzopyran (4), was isolated from penicillium expansum. during the isolation procedure 4 was determined to be unstable and readily reacted with methanol, ethanol, and water, forming three new isochromans, (1s,3s)-6-hydroxy-1,8-dimethoxy-3,5-dimethylisochroman (1), 1-ethoxy-6-hydroxy-8-methoxy-3,5-dimethylisochroman (2), and 1,6-dihydroxy-8-methoxy-3,5-dimethylisochroman (3), respectively. (3s)-6-hydroxy-8-methoxy-3,5-d ... | 2004 | 15270557 |
| [penicillium expansum, a resident fungal strain of the orbital complex mir, producing xanthocillin x and questiomycin a]. | it was demonstrated that the fungus penicillium expansum 2-7, a resident strain of the orbital complex mir, which became dominating at the end of a long-term space flight, formed biologically active secondary metabolites (antibiotics). using physicochemical methods, these metabolites were identified as xanthocyllin x and questiomycin a. time courses of their biosyntheses during growth and development of the producer culture were studied. addition of zinc to the culture medium affected both the g ... | 2004 | 15283339 |
| antifungal constituents of melicope borbonica. | fractionation of extracts of the leaves of melicope borbonica (syn. euodia borbonica var. borbonica), a medicinal plant from the réunion island that is traditionally used for wound healing and other ailments, afforded an acetophenone (xanthoxylin) and two coumarins, scoparone and limettin, as the major constituents. all three compounds exhibited moderate antifungal activity against candida albicans and penicillium expansum, in accordance with the traditional use of the plant. moreover, 2,4,6-tri ... | 2004 | 15305313 |
| fumaric acid in apple juice: a potential indicator of microbial spoilage of apples used as raw material. | the effects of heat treatment (evaporation and excessive heating), and microbial contamination (rhizopus stolonifer, penicillium expansum and lactobacillus plantarum) as sources of fumaric acid formation in apple juice concentrates were investigated. fumaric acid formed in apple juice did not exceed 1.0 mg l(-1) during both commercial-scale evaporation and laboratory-scale excessive heat treatment, indicating that malic dehydration is not the primary source of fumaric acid formation. however, r. ... | 2004 | 15370835 |
| effect of treatment with trichoderma harzianum rifai formulated in invert emulsion on postharvest decay of apple blue mold. | conidia of trichoderma harzianum were formulated in invert emulsion (water-in-oil type) at a concentration of 6.0 x 10(7) conidia/ml of the formulation. treatments with conidia in the formulated emulsion and conidia in sterile distilled water were conducted to assess the effect on penicillium expansum link inoculated on apple fruits. comparisons were made with control treatments of an uninoculated emulsion and uninoculated distilled water. the t. harzianum-containing emulsion significantly (p <o ... | 2004 | 15454318 |
| growth inhibition of foodborne pathogens and food spoilage organisms by select raw honeys. | twenty-seven honey samples from different floral sources and geographical locations were evaluated for their ability to inhibit the growth of seven food spoilage organisms (alcaligenes faecalis, aspergillus niger, bacillus stearothermophilus, geotrichum candidum, lactobacillus acidophilus, penicillium expansum, pseudomonas fluorescens) and five foodborne pathogens (bacillus cereus, escherichia coli o157:h7, listeria monocytogenes, salmonella enterica ser. typhimurium, and staphylococcus aureus) ... | 2004 | 15527912 |
| detection of aflatoxin-producing molds in korean fermented foods and grains by multiplex pcr. | an assay based on multiplex pcr was applied for the detection of potential aflatoxin-producing molds in korean fermented foods and grains. three genes, avfa, omta, and ver-1, coding for key enzymes in aflatoxin biosynthesis, were used as aflatoxin-detecting target genes in multiplex pcr. dna extracted from aspergillus flavus, aspergillus parasiticus, aspergillus oryzae, aspergillus niger, aspergillus terreus, penicillium expansum, and fusarium verticillioides was used as pcr template to test spe ... | 2004 | 15553652 |
| influence of intrinsic factors of apples on the growth and patulin production of penicillium expansum. | 2004 | 15560184 | |
| the presence of penicillium and penicillium mycotoxins in food wastes. | a total of 97 samples (48 summer and 49 winter) of food waste from private households were investigated for penicillium and for mycotoxins. twenty-five penicillium species were isolated and penicillium crustosum, penicillium brevicompactum, penicillium chrysogenum, penicillium expansum, penicillium roqueforti, penicillium spinulosum, penicillium viridicatum, penicillium commune, penicillium citrinum and penicillium solitum were, in decreasing order, the most frequently identified species. mycoto ... | 2004 | 14698099 |
| new insecticidal compounds, communesins c, d and e, from penicillium expansum link mk-57. | three new communesin congeners, communesins c, d, and e, together with two known communesins a and b were isolated from okara that had been fermented with penicillium expansum link mk-57. all these communesins showed the insecticidal activity against the silkworms. | 2004 | 15056914 |
| inhibition of patulin production by penicillium expansum cultured with neem (azadirachta indica) leaf extracts. | aqueous extract of the leaves of neem [azadirachta indica a. juss (meliaceae)] was tested in vitro for antifungal activity against penicillium expansum. patulin production was inhibited during cultivation, when concentrations higher than 50 mg/ml of neem leaf extract was added to the culture medium. analyses of mycotoxin production were performed by tlc and hplc. fungal growth and colony characteristics, in the presence of the extract, were investigated and compared with extract-free cultures. | 2004 | 15069669 |
| penicillium expansum: consistent production of patulin, chaetoglobosins, and other secondary metabolites in culture and their natural occurrence in fruit products. | penicillium expansum is known for its destructive rot and patulin production in apple juice. according to the literature, p. expansum can, among other compounds, produce citrinin, ochratoxin a, patulin, penitrem a, and rubratoxin b. in this study the qualitative production of metabolites was examined using tlc (260 isolates), hplc (85 isolates), and ms (22 isolates). the results showed that none of the 260 isolates produced ochratoxin a, penitrem a, or rubratoxin b. however, chaetoglobosin a and ... | 2004 | 15080656 |
| apple (malus domestica) and tomato (lycopersicum esculentum) fruits cell-wall hemicelluloses and xyloglucan degradation during penicillium expansum infection. | we characterized the changes in cell-wall hemicellulosic polysaccharides and the hemicellulose-degrading enzymes associated with apple and tomato fruits infected by penicillium expansum. our results showed a reduction in the molecular mass of hemicelluloses, with this reduction being particularly notable in the xyloglucan associated with p. expansum infection. the activation of fungal beta-glucanases was also highlighted. fruit xyloglucan endotransglucosylase/hydrolase (xth)-specific activity de ... | 2004 | 15612782 |
| relationship between host acidification and virulence of penicillium spp. on apple and citrus fruit. | abstract penicillium expansum, p. digitatum, and p. italicum acidify the ambient environments of apple and citrus fruit during decay development. they use two mechanisms for this: the production of organic acids, mainly citric and gluconic, and nh(4)(+) utilization associated with h(+) efflux. exposure of p. expansum and p. digitatum hyphae to ph 5.0 increased their citric acid production, compared with the production of organic acids at acidic ambient ph. in decayed fruit, both pathogens produc ... | 2004 | 18943818 |
| occurrence ofpenicillium expansum and patulin in apples as raw materials for processing of foods - case study. | the contamination of apples gloster variety withpenicillium expansum was investigated in the case study. the apples serve as a raw material in thefood industry for processing of baby foodstuffs and other apple products. the core of 3 - 5 % apple samples has been contaminated with spores and mycelium of untested microfungi. the surface tissue of stored apples has not been damaged. penicillium expansum was isolated in all tested apple samples. patulin has been found at levels tens to hundreds of ü ... | 2004 | 23604993 |
| liquid formulation of the postharvest biocontrol agent candida sake cpa-1 in isotonic solutions. | abstract viability of the postharvest biocontrol agent candida sake cpa-1 stored as liquid formulation was evaluated by studying the effect of growth, preservation medium, and temperature. c. sake was grown in molasses medium with unmodified water activity (a(w)) and in the same with a(w) modified to 0.98 with the addition of several solutes. cells were preserved with isotonic solutions of different substances. efficacy of liquid formulations stored for different periods was tested against infec ... | 2003 | 18944358 |
| isolation and characterization of genes differentially expressed during the interaction between apple fruit and penicillium expansum. | summary differences in gene expression during the susceptible interaction between 'golden delicious' apple fruits and the fungus penicillium expansum were investigated by differential display (dd) rt-pcr. partial cdnas from 26 clones from both the fungus and the fruit were selected for nucleotide sequence determination and homology searches, and 20 were subsequently selected for further analyses. in a preliminary series of northern blot analyses, 18 genes were confirmed as showing a higher expre ... | 2003 | 20569404 |
| resistance of postharvest biocontrol yeasts to oxidative stress: a possible new mechanism of action. | abstract we detected the generation of the reactive oxygen species (ros) superoxide anion ( o.(-) (2)) and hydrogen peroxide (h(2)o(2)) in apple wounds 2 immediately after wounding, and assessed the relationships between (i) timely colonization of apple wounds by biocontrol yeasts, (ii) resistance of these microorganisms to oxidative stress caused by ros, and (iii) their antagonism against postharvest wound pathogens. we analyzed a model system consisting of two yeasts with higher (cryptococcus ... | 2003 | 18942978 |
| detection of penicillium expansum by polymerase chain reaction. | penicillium expansum is a major causative agent of postharvest decay in a variety of fruits, including apples, peaches, nectarines, and cherries. it causes significant economic losses to the fruit industry and is also of potential public health significance, since it produces patulin, a mycotoxin known to cause harmful effects in animals. rapid and specific detection of p. expansum is important for ensuring microbiological quality and safety of fruits and fruit juices. the traditional methods fo ... | 2003 | 14623379 |
| effect of gamma irradiation on elimination of aflatoxins produced by apple mycoflora in apple fruits. | the influence of ionizing radiation on the growth of apple mycoflora and the aflatoxins production was investigated. four strains of fungal isolates, aspergillus flavus, a. fumigatuis, a. niger, penicillium expansum, were used. four doses of gamma radiation were applied (0.5, 1.0, 1.5 and 2.0 kgy). the elimination of aflatoxins under selected conditions was detected by using hplc techniques. doses of 0.5 kgy stimulated the production of aflatoxins by all fungi tested while 1.0-2.0 kgy reduced th ... | 2003 | 15095925 |
| differential adaptation of membranes of two osmotolerant fungi, aspergillus chevalieri and penicillium expansum to high sucrose concentrations. | aspergillus chevalieri and penicillium expansum were able to tolerate sucrose concentrations in the growth media up to 80% (w/v). at 50% sucrose the growth rate is approximately 1.4 and 1.2 times, respectively, higher than in the control. while at 80% sucrose it drops to 35% and 45% of the control level for both fungi. lipids and proteins in plasma membranes increased with increasing sucrose concentrations in the growth medium. phospholipid content in membranes of both organisms being also incre ... | 2003 | 12916728 |
| antifungal activity of 10-oxo-trans-8-decenoic acid and 1-octen-3-ol against penicillium expansum in potato dextrose agar medium. | in mushrooms, 10-oxo-trans-8-decenoic acid (oda) and 1-octen-3-ol are secondary metabolites produced naturally by the enzymatic breakdown of linoleic acid. both compounds were determined to inhibit the mycelial growth of penicillium expansum pp497a, a common food spoilage organism, when added to potato dextrose agar medium. oda and 1-octen-3-ol were inhibitory at concentrations of > 1.25 mm (230 microg/g for oda and 160 microg/g for 1-octen-3-ol). at ph 5.6, 1-octen-3-ol was more inhibitory than ... | 2003 | 12929847 |
| liquid formulation of the biocontrol agent candida sake by modifying water activity or adding protectants. | to evaluate the effect of modification of water activity (aw) and the addition of protective substances in the preservation medium of liquid formulations of the biocontrol agent candida sake stored at 4 and 20 degrees c. | 2003 | 12534826 |
| non-conventional methods for the control of post-harvest pear diseases. | pears are highly perishable products, especially during the post-harvest phase, when considerable losses can occur. among the fungal diseases, blue mold caused by penicillium expansum, grey mould caused by botrytis cinerea, mucor rot caused by mucor piriformis are common on pear fruits. other (weak) pathogens like phialophora malorum, alternaria spp., and cladosporium herbarum tend to infect wounds and senescent fruits. a post-harvest fungicide treatment can reduce decay but effectiveness decrea ... | 2003 | 12694440 |
| apple quality, storage, and washing treatments affect patulin levels in apple cider. | patulin is a mycotoxin produced primarily by penicillium expansum, a mold responsible for rot in apples and other fruits. the growth of this fungus and the production of patulin are common in fruit that has been damaged. however, patulin can be detected in visibly sound fruit. the purpose of this project was to determine how apple quality, storage, and washing treatments affect patulin levels in apple cider. patulin was not detected in cider pressed from fresh tree-picked apples (seven cultivars ... | 2003 | 12696685 |
| germination and adhesion of fungal conidia on polycarbonate membranes and on apple fruit exposed to mycoactive acetate esters. | the adhesion and germination of conidia of nine fungal species were assessed on polycarbonate membranes or on the skin of apple fruit in sealed glass bottles injected or not injected with acetate esters. adhesion was determined after dislodging conidia from surfaces using a sonication probe. adhesion and germination of conidia of aspergillus flavus, aspergillus fumigatus, aspergillus niger, penicillium citrinum, penicillium claviforme, or trichoderma sp. on membranes after 48 h were not increase ... | 2003 | 12718401 |
| isolation, identification and seasonal distribution of airborne and waterborne fungi in terkos lake (istanbul-turkey). | this paper focuses on isolation and identification of airborne and waterborne fungi from different parts of terkos lake located in istanbul (turkey). the quantitative and qualitative fungal composition of the air and water of the lake was surveyed monthly for a year (august 2000-july 2001). water samples were taken at five different stations at terkos lake. airborne fungal spore levels were estimated by exposing a petri dish containing rose-bengal streptomycin agar medium to air for 15 minutes. ... | 2003 | 12746850 |