Comparison of the volatile composition of wild fennel samples (Foeniculum vulgare Mill.) from central Spain     

Díaz-Maroto MC  Pérez-Coello MS  Esteban J  Sanz J 《Journal of agricultural and food chemistry》2006,54(18):6814-6818

Comparison of the volatile composition of fennel (Foeniculum vulgare Mill.) has been carried out using direct thermal desorption (DTD) coupled to gas chromatography-mass spectrometry. Forty-two wild fennel stem samples were collected in two different geographical areas of Central Spain. DTD allowed a high recovery of volatiles from small sample sizes without thermal decomposition. trans-Anethole was the main volatile compound for most cases, although a high variability was found among samples, showing clear phytochemical differences.  相似文献   

Preferential distribution of fish larvae in the California Current System: Time,space, and temperature          下载免费PDF全文

J. Jesús Bautista‐Romero  Rene Funes‐Rodríguez  Sylvia P. A. Jiménez‐Rosenberg  Daniel B. Lluch‐Cota 《Fisheries Oceanography》2018,27(3):259-273

The preferential larval distributions of 22 fish species in the California Current System were identified in their temporal, spatial, and thermal domains using single parameter quotient analysis. This analysis allowed the characterization of their reproductive habitats based on ranges of preference, tolerance, and avoidance. In the temporal domain, the species’ preference intervals were wider than those previously reported, and all species showed preferences during two or more seasons of the year. In the spatial domain, the preferential distributions of the species were also wider, and some of them had different preferred zones from those described in previous works. Because one group of species was preferably distributed in coastal zones, and the other group was preferably distributed in oceanic zones, the biological production mechanisms sustaining these groups differ, namely, coastal upwelling and geostrophic fluxes of subarctic origin, respectively. In the thermal domain, the larval distribution preferences of 20 of 22 species have been determined for the first time, providing important information on their thermal tolerance window during the larval stage, a window that changes in width throughout each of the ontogenetic stages of fish. The distribution in each domain suggests association patterns between species, but additional studies are necessary to validate these patterns.  相似文献   

Vermicompost and Vermiwash Minimized the Influence of Salinity Stress on Growth Parameters in Potato Plants     

José de Jesús Pérez-Gómez  Miguel Abud-Archila  Juan José Villalobos-Maldonado  Samuel Enciso-Saenz  Héctor Hernández de León  Víctor Manuel Ruiz-Valdiviezo 《Compost science & utilization》2017,25(4):282-287

Potato (Solanum tuberosum L.) is the fourth major crop worldwide after cereals. Some producers use irrigation water with high salinity, which consequently decreases the agronomic yield and potato quality. The aim of this investigation was to determine the effect of vermicompost and vermiwash on plant growth and tuber yield and characteristic traits in Solanum tuberosum L. plants and tubers subjected to salinity stress. A surface response experimental design with three replicates using a central point and 15 treatments was used with vermicompost at 300, 580, and 860 g plant^?1; vermiwash at 5, 10, and 15 ml plant^?1; and salinity stress with 15, 20, and 25 mM of NaCl levels. Plant physiological measurements included plant height (cm), stem diameter (mm), and plant fresh and plant dry weight (g). Six months after planting, measurements on tuber fresh weight, pH, electric conductivity, and °Brix were carried out. The addition of vermicompost and vermiwash minimized the influence of salinity stress on growth parameters and tuber characteristics in potato plants. Vermicompost (580 g plant^?1) plus vermiwash (15 ml plant^?1) induced a greater plant height and stem diameter. Plants amended with vermicompost (860 g plant^?1), vermiwash (15 ml plant^?1), and salinity stress (15 mM) had higher pH values, whereas electrical conductivity value in potato tubers decreased.  相似文献   

TRANSRECTAL ULTRASONOGRAPHY OF EQUINE LUMBOSACRAL NERVES: PILOT STUDY IN 28 HEALTHY WARMBLOOD HORSES          下载免费PDF全文

Pablo Espinosa  Philippe Benoit  Isabel Salazar  Jesús de la Fuente  Philippe Heiles 《Veterinary radiology & ultrasound》2017,58(2):228-236

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A multi-criteria approach to identify favorable areas for goat production systems in Veracruz,México     

Emmanuel de Jesús Ramírez-Rivera  Jose Lopez-Collado  Pablo Díaz-Rivera  Eusebio Ortega-Jiménez  Glafiro Torres-Hernández  Jazmín Jacinto-Padilla  Erasmo Herman-Lara 《Tropical animal health and production》2017,49(4):725-731

This research identifies favorable areas for goat production systems in the state of Veracruz, Mexico. Through the use of the analytic hierarchy process, layers of biophysical and soil information were combined to generate a model of favorability. Model validation was performed by calculating the area under the curve, the true skill statistic, and a qualitative comparison with census records. The results showed the existence of regions with high (4494.3 km²) and moderate (2985.8 km²) favorability, and these areas correspond to 6.25 and 4.15%, respectively, of the state territory and are located in the regions of Sierra de Huayacocotla, Perote, and Orizaba. These regions are characterized as mountainous and having predominantly temperate-wet or cold climates, and having montane mesophilic forests, containing pine, fir, and desert scrub. The reliability of the distribution model was supported by the area under the curve value (0.96), the true skill statistic (0.86), and consistency with census records.  相似文献   

Random pattern of parasitism and female-biased sex ratio in the egg parasitoid <Emphasis Type="Italic">Neochrysocharis formosa</Emphasis> attacking the pine sawfly <Emphasis Type="Italic">Diprion pini</Emphasis> in mountain forests of Spain     

Jesús Selfa  Carlo Polidori  Josep Daniel Asís  Luis De Pedro  Juli Pujade-Villar  José Tormos 《Phytoparasitica》2017,45(1):85-93

The most harmful hymenopteran pests of Pinus sylvestris L. are conifer sawflies from the family Diprionidae, including the widespread Diprion pini (L.). Natural enemies of this pest are still poorly known in many European areas where attacks occur. We studied the egg parasitoids of D. pini at four sites in two mountainous areas of Spain: the Sierra de Francia (western Spain) and the Sierra de Albarracín (eastern Spain). At all sites, the dominant egg parasitoid was Neochrysocharis formosa (Westwood) (Hymenoptera: Eulophidae), whereas other three chalcidoid species were rare. All these species were previously recorded in association with D. pini, but we report here their first record in Spain. Neochrysocharis formosa attacked up to 32.3% of egg clusters of D. pini in the Sierra de Albarracín and 18.5% in the Sierra de Francia. In the attacked egg clusters, this species parasitized up to 35% of eggs in the Sierra de Albarracín and 23.7% in the Sierra de Francia, with a marked female-biased sex ratio. Contrary to the clustered pattern of parasitism observed for N. formosa while attacking other gregarious diprionids, the oviposition in egg clusters of D. pini followed a random pattern, probably due to the froth roof (spumous coating) that covers its eggs and interferes with the egg-searching behavior of females. Indeed, other parasitoid species of D. pini have been reported to behave similarly.  相似文献   

Migration by seed dispersal of ACCase‐inhibitor‐resistant Avena fatua in north‐western Mexico          下载免费PDF全文

J Antonio Tafoya‐Razo  Juan Núñez‐Farfán  Jesús R Torres‐García 《Pest management science》2017,73(1):167-173

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A negative association between bromadiolone exposure and nestling body condition in common kestrels: management implications for vole outbreaks          下载免费PDF全文

Jesús Martínez‐Padilla  Jhon J López‐Perea  Rafael Mateo  Alfonso Paz  Javier Viñuela 《Pest management science》2017,73(2):364-370

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Estimation of preliminary reference values for macro and micronutrients in ‘Valencia’ orange in Venezuela,by means of the compositional nutrient diagnosis system     

Edwin A. Hernández-Caraballo  Wendy C. Bencomo-Fernández  Jesús Aular  Orlando Rodríguez-Rodríguez 《Communications in Soil Science and Plant Analysis》2018,49(15):1943-1952

The present study was aimed at developing preliminary reference values for foliar tissue for nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), copper (Cu), iron (Fe), manganese (Mn), and zinc (Zn) for `Valencia´ orange in Venezuela, using the Compositional Nutrient Diagnosis system (CND). References values were derived from a database comprising the nutrients concentrations and the yields of `Valencia´ orange trees (Citrus sinensis L. Osbeck) grafted on two different rootstocks, viz., Volkamer lemon (Citrus volkameriana Pasq.), and Cleopatra tangerine (Citrus reshni, Hort. ex. Tan). Cutoff values separating high- and low-yield sub-samples were estimated through modeling the cumulative variance ratio function versus yield relationships with the Boltzmann equation. For macronutrients, the norms developed were dependent upon the inclusion of the micronutrients concentrations in the calculations, and on the rootstocks. Care must thus be exercised, since nutrient indexes, and thus nutritional diagnosis, are based upon proper selection of such values.  相似文献   

Oxidative stress regulates the expression of the Pht cluster genes involved in phaseolotoxin synthesis in <Emphasis Type="Italic">Pseudomonas syringae</Emphasis> pv. <Emphasis Type="Italic">phaseolicola</Emphasis> NPS3121     

Alejandro Hernández-Morales  Jennifer Alexis Rojas-Morales  Marisol Reynoso-López  Abril Bernardette Martínez-Rizo  Jesús Bernardino Velázquez-Fernández  Jackeline Lizzeta Arvizu-Gómez 《Journal of General Plant Pathology》2018,84(2):137-141

This study evaluated the role of oxidative stress on the expression of Pht cluster genes involved in phaseolotoxin synthesis in Pseudomonas syringae pv. phaseolicola. Results demonstrate that the expression of Pht cluster genes is regulated by oxidative stress in a manner dependent of the ROS present in the cell. The presence of H₂O₂ and Paraquat, influences on the expression of the Pht cluster genes in function of the compound and of the concentration evaluated, demonstrating that expression of Pht genes is part of the oxidative stress response in P. syringae pv. phaseolicola NPS3121.  相似文献