Effects of temperature and water activity on FUM2 and FUM21 gene expression and fumonisin B production in Fusarium verticillioides     

Irene Lazzaro  Antonia Susca  Giuseppina Mulè  Alberto Ritieni  Rosalia Ferracane  Adriano Marocco  Paola Battilani 《European journal of plant pathology / European Foundation for Plant Pathology》2012,134(4):685-695

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Effects of the infection by the fungal endophyte Epichloë festucae in the growth and nutrient content of Festuca rubra     

Íigo Zabalgogeazcoa  Antonia García Ciudad  Beatriz R. Vzquez de Aldana  Balbino García Criado 《European Journal of Agronomy》2006,24(4):374-384

Festuca rubra, a commercially important turfgrass, is a common species in natural semiarid grasslands of western Spain. In natural populations of this grass, about 70% of the individuals are infected by the fungal endophyte Epichloë festucae. In most cases, infected plants are asymptomatic. To test if there were differences in growth or nutrient content between infected (E+) and uninfected (E−) plants, five half-sib lines of F. rubra were used. Each line consisted of E+ and E− individuals. These plants were used for a 5 years long field experiment in conditions typical of the surrounding semiarid grasslands. The soil was poor in nutrients, and rainfall was scarce in the spring and summer. No differences in biomass production or number of stems were observed between E+ and E− plants. Regarding nutrient content, E+ plants in vegetative state contained more phosphorus than E− plants. This effect was consistently observed in the 3 years that this type of tissue was analyzed. In one of these 3 years Mn content was lower in E+ plants than in their E− counterparts. In plants in a reproductive stage, differences between E+ and E− plants were found with respect to Ca, Mg, and Cu content. In this developmental stage, the contents of neutral detergent fiber and lignin were lower in infected plants, and their organic matter digestibility was greater. The evidence presented in this study shows that in field conditions, the content of certain nutrients, P in particular, and fiber constituents of F. rubra are altered when the plants are infected by the endophyte E. festucae. Since most nutrients were found in concentrations below the adequate range for plant growth, increased P content is a beneficial effect of E. festucae infection. This fact helps to explain why endophyte infection incidence is high in natural populations of F. rubra, and why the development of endophyte infected turfgrass cultivars may be useful for low maintenance lawns.  相似文献   

Extraction and analysis of lead in sweeteners by flow-injection Donnan dialysis with flame atomic absorption spectroscopy     

Antonia A  Allen LB 《Journal of agricultural and food chemistry》2001,49(10):4615-4618

Flow-injection Donnan dialysis is demonstrated for the extraction of lead in sweeteners using flame atomic absorption spectroscopy (FAAS). For spiked concentrations in the low microgram per gram range, recoveries were greater than 90%, and the relative standard deviation was typically less than 10% for a 15-min dialysis procedure. The method detection limit is 350 ng/g. Donnan dialysis is shown to be successful for the extraction of lead in sucrose, corn syrup, and honey but limited in performance for molasses and artificial syrup. This paper also includes a comparison to other procedures for the determination of lead in sweeteners and presents options for realizing improved method performance with Donnan dialysis.  相似文献   

Production in large quantities of highly purified hydroxytyrosol from liquid-solid waste of two-phase olive oil processing or "Alperujo"     

Fernández-Bolaños J  Rodríguez G  Rodríguez R  Heredia A  Guillén R  Jiménez A 《Journal of agricultural and food chemistry》2002,50(23):6804-6811

The effect of hydrothermal treatment of two-phase olive waste (alperujo) on the solubilization of hydroxytyrosol was studied. Different conditions of saturated steam were assayed. A high amount of hydroxytyrosol was solubilized and increased with increasing steaming temperature and time, reaching 1.4-1.7 g/100 g of dry alperujo. The effect of acidic (H(2)SO(4)) and basic (NaOH) catalysts was also evaluated. Acid-catalyzed treatment was more effective at milder conditions, whereas the alkali-catalyzed conditions were not very suitable. In the present study, the extracted hydroxytyrosol was purified by means of a new, simple, and inexpensive chromatographic system, under international patent application (PCT/ES02/00058). From 1000 kg of alperujo, with 70% humidity, can be obtained approximately 4.5-5 kg of hydroxytyrosol. After a purification process, at least 3 kg of hydroxytyrosol, at 90-95% purity, would be obtained. The purified compound was identified by HPLC/UV and (1)H and (13)C NMR analyses, and its antioxidant activity was tested on refined olive oil without antioxidants by Rancimat method. The oxidative stability of refined olive oil was increased by a factor of 1.71 in the presence of 100 ppm of hydroxytyrosol.  相似文献   

Plasma levels of six carotenoids in nine European countries: report from the European Prospective Investigation into Cancer and Nutrition (EPIC)     

Al-Delaimy WK  van Kappel AL  Ferrari P  Slimani N  Steghens JP  Bingham S  Johansson I  Wallström P  Overvad K  Tjønneland A  Key TJ  Welch AA  Bueno-de-Mesquita HB  Peeters PH  Boeing H  Linseisen J  Clavel-Chapelon F  Guibout C  Navarro C  Quirós JR  Palli D  Celentano E  Trichopoulou A  Benetou V  Kaaks R  Riboli E 《Public health nutrition》2004,7(6):713-722

BACKGROUND: In addition to their possible direct biological effects, plasma carotenoids can be used as biochemical markers of fruit and vegetable consumption for identifying diet-disease associations in epidemiological studies. Few studies have compared levels of these carotenoids between countries in Europe. OBJECTIVE: Our aim was to assess the variability of plasma carotenoid levels within the cohort of the European Prospective Investigation into Cancer and Nutrition (EPIC). METHODS: Plasma levels of six carotenoids--alpha-carotene, beta-carotene, beta-cryptoxanthin, lycopene, lutein and zeaxanthin--were measured cross-sectionally in 3043 study subjects from 16 regions in nine European countries. We investigated the relative influence of gender, season, age, body mass index (BMI), alcohol intake and smoking status on plasma levels of the carotenoids. RESULTS: Mean plasma level of the sum of the six carotenoids varied twofold between regions (1.35 micromol l(-1) for men in Malm?, Sweden vs. 2.79 micromol l(-1) for men in Ragusa/Naples, Italy; 1.61 micromol l(-1) for women in The Netherlands vs. 3.52 micromol l(-1) in Ragusa/Naples, Italy). Mean levels of individual carotenoids varied up to fourfold (alpha-carotene: 0.06 micromol l(-1) for men in Murcia, Spain vs. 0.25 micromol l(-1) for vegetarian men living in the UK). In multivariate regression analyses, region was the most important predictor of total plasma carotenoid level (partial R(2)=27.3%), followed by BMI (partial R(2)=5.2%), gender (partial R(2)=2.7%) and smoking status (partial R(2)=2.8%). Females had higher total carotenoid levels than males across Europe. CONCLUSIONS: Plasma levels of carotenoids vary substantially between 16 different regions in Italy, Greece, Spain, France, Germany, the UK, Sweden, Denmark and The Netherlands. Compared with region of residence, the other demographic and lifestyle factors and laboratory measurements have limited predictive value for plasma carotenoid levels in Europe.  相似文献   

An anatomical study of the dorsal and ventral nasal conchal bullae and middle nasal conchae in normal Shetland ponies: Computed tomographic anatomical and morphometric findings     

Kerstin Gerlach  Ingrid Vervuert  Claudia Gittel  Lisa Köhler  Nane Schmidt  Karsten Winter  Dagmar Berner  Antonia Troillet  Ellen Schulz-Kornas 《Anatomia, histologia, embryologia》2021,50(3):431-438

Equine paranasal sinuses are susceptible to inflammation. Insufficient drainage through the nasal passages and meatus may lead to the accumulation of inspissated purulent discharge. Particularly in ponies, these anatomical structures are suspected to be relatively small. To date, there are no reports considering the morphology of nasal conchal bullae in small horse breeds such as Shetland ponies. The aim of the present study was to evaluate the size of the conchal bullae and the medial nasal conchae of Shetland ponies and their relation to the skull dimension using computed tomography. Reconstructed images of healthy adult heads of Shetland ponies were used. Linear skull measurements as well as two cranial indices of the head dimensions were taken. Length, width and height of the dorsal and ventral conchal bullae and the medial nasal conchae were measured in relation to the skull and compared with the data of skulls of large breed horses. The anatomical proportions of pony heads were characterized by a smaller cranial index and a greater nasal index than those of large breed horses. Shetland ponies showed a longer cranial length compared with the nasal length. Heads are consistently smaller, and the relationship of the bullae to the head length was also smaller than those measured in large breed horses. A negative correlation between the head and bullae size was found. In conclusion, this study suggests that Shetland ponies have distinguishing proportions of the head. These findings are relevant for clinical examination and surgical treatment of equine sinus disease in those breeds.  相似文献   

Nutrition consultation for an overweight growing Bernese Mountain Dog—A case report     

Antonia Giordanella  Kerstin Gerstner  Angela Gimmel  Annette Liesegang 《Journal of animal physiology and animal nutrition》2021,105(Z2):124-128

In growing dogs, overweight is assimilated and attributed to a fast growth rate. Proper nutrition plays a very important role during growth as mistakes in feeding may lead to severe disease. This case report is an example for excessive weight gain during growth that, particularly in large breed dogs, may lead to skeletal disorders such as improper alignments of the limbs. If body weight gain exceeds the ideal range of the individual growth curve (by initially 4 kg in this case), fast growth may lead to growth disturbances and associated chronic diseases. These cases require a dietary adaption. However, the success in the nutritional management of the body weight relies largely on the owner's compliance.  相似文献   

Immunopathogenesis and immunotherapy of Culicoides hypersensitivity in horses: an update     

Eliane Marti  Ella N. Novotny  Iva Cvitas  Anja Ziegler  A. Douglas Wilson  Sigurbjörg Torsteinsdottir  Antonia Fettelschoss-Gabriel  Sigridur Jonsdottir 《Veterinary dermatology》2021,32(6):579-e156

Culicoides hypersensitivity (CH) is a strongly pruritic dermatitis of horses, characterised histologically by mixed perivascular to diffuse cellular infiltrates of mononuclear cells and eosinophils, and caused by helper T cell (Th)2, immunoglobulin (Ig)E-mediated reactions to antigens present in the saliva of biting Culicoides midges. As treatment of CH is still not satisfactory, a better knowledge of the pathogenesis of CH is needed for the development of new therapeutic modalities. Accordingly, availability of pure Culicoides allergens instead of crude whole body extracts is essential for the improvement of in vitro diagnosis of CH and development of a more effective allergen immunotherapy (AIT). Beside the Th2 cytokines interleukin (IL)-4 and IL-13, recent studies have shown the involvement of thymic stromal lymphopoietin, IL-5 and IL-31 in the pathogenesis of CH. The importance of IL-5 and IL-31 has been confirmed through targeting these cytokines by active immunisation of CH patients, resulting in a significant decrease of CH lesion scores. Thirty Culicoides salivary allergens have been described over the last 10 years and produced as pure recombinant (r-) proteins. Use of a protein microarray has allowed the identification of the most relevant Culicoides r-allergens for CH in central and northern Europe. An immunisation protocol has been developed for preventive AIT against CH. Small amounts of r-Culicoides allergens injected into the submandibular lymph nodes with Alum/MPLA as adjuvants seem to induce a suitable immune response for both preventive and therapeutic AIT. The next years will reveal whether these recent advancements will translate into an improved diagnosis, treatment and prevention of CH.  相似文献   

A genomewide association study in divergently selected lines in rabbits reveals novel genomic regions associated with litter size traits     

Bolívar Samuel Sosa-Madrid  María Antonia Santacreu  Agustín Blasco  Luca Fontanesi  Romi Natacha Pena  Noelia Ibáñez-Escriche 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》2020,137(2):123-138

Uterine capacity (UC), defined as the total number of kits from unilaterally ovariectomized does at birth, has a high genetic correlation with litter size. The aim of our research was to identify genomic regions associated with litter size traits through a genomewide association study using rabbits from a divergent selection experiment for UC. A high-density SNP array (200K) was used to genotype 181 does from a control population, high and low UC lines. Traits included total number born (TNB), number born alive (NBA), number born dead, ovulation rate (OR), implanted embryos (IE) and embryo, foetal and prenatal survivals at second parity. We implemented the Bayes B method and the associations were tested by Bayes factors and the percentage of genomic variance (GV) explained by windows. Different genomic regions associated with TNB, NBA, IE and OR were found. These regions explained 7.36%, 1.27%, 15.87% and 3.95% of GV, respectively. Two consecutive windows on chromosome 17 were associated with TNB, NBA and IE. This genomic region accounted for 6.32% of GV of TNB. In this region, we found the BMP4, PTDGR, PTGER2, STYX and CDKN3 candidate genes which presented functional annotations linked to some reproductive processes. Our findings suggest that a genomic region on chromosome 17 has an important effect on litter size traits. However, further analyses are needed to validate this region in other maternal rabbit lines.  相似文献   

Further insights into the characterization of equine adipose tissue-derived mesenchymal stem cells     

Raabe O  Shell K  Würtz A  Reich CM  Wenisch S  Arnhold S 《Veterinary research communications》2011,35(6):355-365

Adipose tissue-derived stem cells (ADSCs) represent a promising subpopulation of adult stem cells for tissue engineering applications in veterinary medicine. In this study we focused on the morphological and molecular biological properties of the ADSCs. The expression of stem cell markers Oct4, Nanog and the surface markers CD90 and CD105 were detected using RT-PCR. ADSCs showed a proliferative potential and were capable of adipogenic and osteogenic differentiation. Expression of Alkaline phosphatase (AP), phosphoprotein (SPP1), Runx2 and osteocalcin (OC) mRNA were positive in osteogenic lineages and peroxisome proliferator activated receptor (Pparγ2) mRNA was positive in adipogenic lineages. ADSCs show stem cell and surface marker profiles and differentiation characteristics that are similar to but distinct from other adult stem cells, such as bone marrow-derived mesenchymal stem cells (BM-MSCs). The availability of an easily accessible and reproducible cell source may greatly facilitate the development of stem cell based tissue engineering and therapies for regenerative equine medicine.  相似文献