Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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    The impact of double-blind placebo-controlled food challenge (DBPCFC) on the socioeconomic cost of food allergy in Europe
    Cerecedo, I. ; Zamora, J. ; Fox, M. ; Voordouw, J. ; Plana, N. ; Rokicka, E. ; Fernandez-Rivas, M. ; Vazquez Cortes, S. ; Reche, M. ; Fiandor, A. ; Kowalski, M. ; Antonides, G. ; Mugford, M. ; Frewer, L.J. ; Hoz, B. De la - \ 2014
    Journal of Investigational Allergology & Clinical Immunology 24 (2014)6. - ISSN 1018-9068 - p. 418 - 424.
    prevalence - hypersensitivity - sensitization
    BACKGROUND: Double-blind placebo controlled food (DBPCFC) is the gold standard diagnostic test in food allergy because it minimizes diagnostic bias. OBJECTIVE: To investigate the potential effect of diagnosis on the socioeconomic costs of food allergy. METHODS: A prospective longitudinal cost analysis study was conducted in Spain and Poland within the EuroPrevall project. Food-allergic patients were enrolled into the study and in all cases diagnosis was confirmed through a standardized DBPCFC. Data were collected through a self-administered survey on all aspects of health and social care resource use, costs of living, and costs of leisure activities. Costs were measured before and 6 months after the DBPCFC and reported in international dollars with 2007 as the benchmark year. RESULTS: Forty-two patients were enrolled. Twenty-one patients had a negative DBPCFC and the suspected food was reintroduced into their diet. Comparing total direct costs before and after the DBPCFC, the reactive group spent a significantly higher amount (median increase of $ 813.1 over baseline), while the tolerant group's spending decreased by a median of $ 87.3 (P=0.31). The amount of money spent on food 6 months after diagnosis was also significantly higher in the reactive group (P=40). Finally, a larger, but not statistically significant, decrease in total indirect costs was observed in the tolerant group compared with the reactive group ($538.3 vs $ 32.3). CONCLUSION: DBPCFC has an impact on indirect and direct costs of living. The main contrubition to this increase was money to spent on food. Keywords: Food allergy. Double-Blind Placebo-Controlled Food Challenge. Diagnosis. Socioeconomic impact.
    Contracting decision and performance of Mexican coffee traders: The role of market institutions
    Rodriguez-Padron, B. ; Cortes Jarrin, A.R. ; Buerger, K. - \ 2014
    International Journal of Agricultural Marketing 1 (2014)2. - ISSN 2167-0470 - p. 10 - 25.
    We identified and explained the contractual choices of Mexican coffee traders in selling their product and analyzed the traders´ performance. The data were obtained from personal interviews with 53 intermediaries in four coffee producing regions of the states of Oaxaca and Veracruz, Mexico. Marketing margins were used as an indicator of traders’ performance. The results indicate that being a roaster, having a wet processing plant and selling cherry coffee negatively affects the use of contracts whereas being vertically integrated has a positive effect. The results also suggest that being registered in the National Coffee System (which only a minority of the interviewed traders were) increases the margin for the trader. Selling cherry coffee, participating in a competitive environment and having a contract decreases these margins (at 5% significance) and may thus enhance the performance of the supply chain and benefit the producers
    Microbial community dynamics in a submerged fixed bed bioreactor during biological treatment of saline urban wastewater
    Cortés-Lorenzo, C. ; Sipkema, D. ; Rodríguez-Díaz, M. ; Fuentes, S. ; Juárez-Jiménez, B. ; Rodelas, B. ; Smidt, H. ; González-López, J. - \ 2014
    Ecological Engineering 71 (2014). - ISSN 0925-8574 - p. 126 - 132.
    activated-sludge - treatment plants - bacterial diversity - sewage-treatment - biofilm reactor - gradient - denitrification - sea
    The influence of salt (NaCl) on bacterial and archaeal communities in a submerged fixed bed bioreactor system for the treatment of urban wastewater was determined by DGGE and 454 pyrosequencing of PCR-amplified 16S ribosomal RNA gene fragments. Cluster analysis of DGGE fingerprints showed significant differences in the community structure dependent on the salt concentration in the influent. Proteobacteria was found to be the dominant bacterial phylum in all experiments, with a-Proteobacteria being the main order at low salinity and ¿-Proteobacteria the dominant order at high salinity. Euryarchaeota was the main archaeal phylum in all experiments, with all microorganisms corresponding to methanogenic archaea. Whereas bacterial a-diversity decreased as salinity increased, archaeal a-diversity increased with higher NaCl concentrations.
    Evolution of the microbial communities in a submerged fixed bed bioreactor during biological treatment of saline urban wastewater
    Cortes Lorenzo, Carmen ; Sipkema, D. ; Rodríguez-Díaz, M. ; Fuentes Enriquez de Salamanca, S. ; Juárez-Jiménez, B. ; Rodelas, B. ; Smidt, H. ; González-López, J. - \ 2013
    Wageningen University
    PRJEB1662 - PRJEB1662 - PRJEB1661 - Alphaproteobacteria - Gammaproteobacteria - Euryarchaeota
    The influence of salt (NaCl) on bacterial and archaeal communities in a submerged fixed bed bioreactor system treating urban wastewater with different saline concentrations was determined by 454 pyrosequencing. Cluster analysis of DGGE fingerprints showed significant differences of the community structure dependent upon the salt concentration applied to the influent. Proteobacteria was found to be the dominant Bacteria Phylum and Euryarchaeota was the main Archaea Phylum in all the experiments. While bacterial α-diversity decreased as salinity increased, the Archaea α-diversity was higher when the NaCl concentration in the influent rose. The differences found between the microbial communities and biodiversity showed that salinity had effects on the structure of microbial communities.
    La agrobiodiversidad de los huertos familiares en Santa Catarina Juquila, Oaxaca: aspectos etnobiológicos
    Sánchez-Cortés, C.E. ; Montaño-Contreras, E.A. ; Vásquez-Dávila, M.A. ; Lope-Alzina, D.G. - \ 2012
    In: Aves y huertos de México / Vásquez-Dávila, M.A., Lope-Alzina, D.G., Oaxaca, MX : Carteles Editores - ISBN 9786077751823 - p. 116 - 117.
    Subjective Welfare, Well-Being, and Self-Reported Food Hypersensitivity in Four European Countries: Implications for European Policy
    Voordouw, J. ; Antonides, G. ; Fox, M. ; Cerecedo, I. ; Zamora, J. ; Hoz Caballer, B. de la; Rokicka, E. ; Cornelisse-Vermaat, J.R. ; Jewczak, M. ; Starosta, P. ; Kowalska, M.L. ; Jedrzejczak-Czechowicz, M. ; Vázquez-Cortés, S. ; Escudero, C. ; Flokstra-de Blok, B.M. ; Dubois, A.E.J. ; Mugford, M. ; Frewer, L.J. - \ 2012
    Social Indicators Research 107 (2012)3. - ISSN 0303-8300 - p. 465 - 482.
    quality-of-life - labeling preferences - allergic consumers - economic costs - health - children - prevalence - income - questionnaire - explanation
    This study estimates the effects of food hypersensitivity on individuals’ perceived welfare and well-being compared to non-food hypersensitive individuals. Study respondents were recruited in the Netherlands, Poland, Spain and UK. The difference in welfare between food hypersensitive respondents and those asymptomatic to foods was estimated using a subjective welfare approach, including income evaluation. Well-being was measured using the Cantril Ladder-of-Life Scale, and health status using the Self-Perceived Health Scale. The difference in well-being, welfare and health status between participant groups was explained further using a number of background variables. No significant within-country differences in welfare between food hypersensitive respondents and respondents asymptomatic to foods were found. In terms of well-being, adult food hypersensitive respondents and their spouses reported significantly less happiness than respondents and their spouses asymptomatic to foods in the Netherlands and Poland. In Spain, the spouses of the food hypersensitive respondents were significantly less happy than respondents aymptomatic to foods. The well-being of children did not significantly differ between groups. The degree of severity of food hypersensitivity was negatively related to overall health status. In Poland, food hypersensitive respondents reported worse health status compared to asymptomatic respondents. In Spain, the converse was true. Food hypersensitive respondents were generally less happy with their life as a whole than respondents asymptomatic to foods, presumably because they experienced more negative effects, which were not related to perceived health status
    Hyperpredation by generalist predatory mites disrupts biological control of aphids by the aphidophagous gall midge Aphidoletes aphidimyza
    Messelink, G.J. ; Bloemhard, C.M.J. ; Cortes, J.A. ; Sabelis, M.W. ; Jansen, A. - \ 2011
    Biological Control 57 (2011)3. - ISSN 1049-9644 - p. 246 - 252.
    intraguild predation - phytoseiid predators - neoseiulus-cucumeris - amblyseius-swirskii - bemisia-tabaci - acari phytoseiidae - prey communities - alternative food - myzus-persicae - control agents
    Biological control of different species of pest with various species of generalist predators can potentially disrupt the control of pests through predator-predator interactions. We evaluate the impact of three species of generalist predatory mites on the biological control of green peach aphids, Myzus persicae (Sulzer) with the aphidophagous gall midge Aphidoletes aphidimyza (Rondani). The predatory mites tested were Neoseiulus cucumeris (Oudemans), Iphiseius degenerans (Berlese) and Amblyseius swirskii Athias–Henriot, which are all commonly used for pest control in greenhouse sweet pepper. All three species of predatory mites were found to feed on eggs of A. aphidimyza, even in the presence of abundant sweet pepper pollen, an alternative food source for the predatory mites. In a greenhouse experiment on sweet pepper, all three predators significantly reduced population densities of A. aphidimyza, but aphid densities only increased significantly in the presence of A. swirskii when compared to the treatment with A. aphidimyza only. This stronger effect of A. swirskii can be explained by the higher population densities that this predator reached on sweet pepper plants compared to the other two predator species. An additional experiment showed that female predatory midges do not avoid oviposition sites with the predator A. swirskii. On the contrary, they even deposited more eggs on plants with predatory mites than on plants without. Hence, this study shows that disruption of aphid control by predatory mites is a realistic scenario in sweet pepper, and needs to be considered when optimizing biological control strategies.
    Genome sequence of the pea aphid Acyrthosiphon pisum
    Richards, Stephen ; Gibbs, Richard A. ; Gerardo, Nicole M. ; Moran, Nancy ; Nakabachi, Atsushi ; Stern, David ; Tagu, Denis ; Wilson, Alex C.C. ; Muzny, Donna ; Kovar, Christie ; Cree, Andy ; Chacko, Joseph ; Chandrabose, Mimi N. ; Dao, Marvin Diep ; Dinh, Huyen H. ; Gabisi, Ramatu Ayiesha ; Hines, Sandra ; Hume, Jennifer ; Jhangian, Shalini N. ; Joshi, Vandita ; Lewis, Lora R. ; Liu, Yih Shin ; Lopez, John ; Morgan, Margaret B. ; Nguyen, Ngoc Bich ; Okwuonu, Geoffrey O. ; Ruiz, San Juana ; Santibanez, Jireh ; Wright, Rita A. ; Fowler, Gerald R. ; Hitchens, Matthew E. ; Lozado, Ryan J. ; Moen, Charles ; Steffen, David ; Warren, James T. ; Zhang, Jingkun ; Nazareth, Lynne V. ; Chavez, Dean ; Davis, Clay ; Lee, Sandra L. ; Patel, Bella Mayurkumar ; Pu, Ling Ling ; Bell, Stephanie N. ; Johnson, Angela Jolivet ; Vattathil, Selina ; Williams, Rex L. ; Shigenobu, Shuji ; Dang, Phat M. ; Morioka, Mizue ; Fukatsu, Takema ; Kudo, Toshiaki ; Miyagishima, Shin Ya ; Jiang, Huaiyang ; Worley, Kim C. ; Legeai, Fabrice ; Gauthier, Jean Pierre ; Collin, Olivier ; Zhang, Lan ; Chen, Hsiu Chuan ; Ermolaeva, Olga ; Hlavina, Wratko ; Kapustin, Yuri ; Kiryutin, Boris ; Kitts, Paul ; Maglott, Donna ; Murphy, Terence ; Pruitt, Kim ; Sapojnikov, Victor ; Souvorov, Alexandre ; Thibaud-Nissen, Françoise ; Câmara, Francisco ; Guigó, Roderic ; Stanke, Mario ; Solovyev, Victor ; Kosarev, Peter ; Gilbert, Don ; Gabaldón, Toni ; Huerta-Cepas, Jaime ; Marcet-Houben, Marina ; Pignatelli, Miguel ; Moya, Andrés ; Rispe, Claude ; Ollivier, Morgane ; Quesneville, Hadi ; Permal, Emmanuelle ; Llorens, Carlos ; Futami, Ricardo ; Hedges, Dale ; Robertson, Hugh M. ; Alioto, Tyler ; Mariotti, Marco ; Nikoh, Naruo ; McCutcheon, John P. ; Burke, Gaelen ; Kamins, Alexandra ; Latorre, Amparo ; Ashton, Peter ; Calevro, Federica ; Charles, Hubert ; Colella, Stefano ; Douglas, Angela E. ; Jander, Georg ; Jones, Derek H. ; Febvay, Gérard ; Kamphuis, Lars G. ; Kushlan, Philip F. ; Macdonald, Sandy ; Ramsey, John ; Schwartz, Julia ; Seah, Stuart ; Thomas, Gavin ; Vellozo, Augusto ; Cass, Bodil ; Degnan, Patrick ; Hurwitz, Bonnie ; Leonardo, Teresa ; Koga, Ryuichi ; Altincicek, Boran ; Anselme, Caroline ; Atamian, Hagop ; Barribeau, Seth M. ; Vos, Martin De; Duncan, Elizabeth ; Evans, Jay ; Ghanim, Murad ; Heddi, Abdelaziz ; Kaloshian, Isgouhi ; Vincent-Monegat, Carole ; Parker, Ben J. ; Pérez-Brocal, Vicente ; Rahbé, Yvan ; Spragg, Chelsea J. ; Tamames, Javier ; Tamarit, Daniel ; Tamborindeguy, Cecilia ; Vilcinskas, Andreas ; Bickel, Ryan D. ; Brisson, Jennifer A. ; Butts, Thomas ; Chang, Chun Che ; Christiaens, Olivier ; Davis, Gregory K. ; Duncan, Elizabeth ; Ferrier, David ; Iga, Masatoshi ; Janssen, Ralf ; Lu, Hsiao Ling ; McGregor, Alistair ; Miura, Toru ; Smagghe, Guy ; Smith, James ; Zee, Maurijn Van Der; Velarde, Rodrigo ; Wilson, Megan ; Dearden, Peter ; Edwards, Owain R. ; Gordon, Karl ; Hilgarth, Roland S. ; Rider, Stanley Dean ; Srinivasan, Dayalan ; Walsh, Thomas K. ; Ishikawa, Asano ; Jaubert-Possamai, Stéphanie ; Fenton, Brian ; Huang, Wenting ; Rizk, Guillaume ; Lavenier, Dominique ; Nicolas, Jacques ; Smadja, Carole ; Zhou, Jing Jiang ; Vieira, Filipe G. ; He, Xiao Li ; Liu, Renhu ; Rozas, Julio ; Field, Linda M. ; Campbell, Peter ; Carolan, James C. ; Fitzroy, Carol I.J. ; Reardon, Karen T. ; Reeck, Gerald R. ; Singh, Karam ; Wilkinson, Thomas L. ; Huybrechts, Jurgen ; Abdel-Latief, Mohatmed ; Robichon, Alain ; Veenstra, Jan A. ; Hauser, Frank ; Cazzamali, Giuseppe ; Schneider, Martina ; Williamson, Michael ; Stafflinger, Elisabeth ; Hansen, Karina K. ; Grimmelikhuijzen, Cornelis J.P. ; Price, Daniel R.G. ; Caillaud, Marina ; Fleet, Eric Van; Ren, Qinghu ; Gatehouse, John A. ; Brault, Véronique ; Monsion, Baptiste ; Diaz, Jason ; Hunnicutt, Laura ; Ju, Ho Jong ; Pechuan, Ximo ; Aguilar, José ; Cortés, Teresa ; Ortiz-Rivas, Benjamín ; Martínez-Torres, David ; Dombrovsky, Aviv ; Dale, Richard P. ; Davies, T.G.E. ; Williamson, Martin S. ; Jones, Andrew ; Sattelle, David ; Williamson, Sally ; Wolstenholme, Adrian ; Cottret, Ludovic ; Sagot, Marie France ; Heckel, David G. ; Hunter, Wayne - \ 2010
    PloS Biology 8 (2010)2. - ISSN 1544-9173

    Aphids are important agricultural pests and also biological models for studies of insect-plant interactions, symbiosis, virus vectoring, and the developmental causes of extreme phenotypic plasticity. Here we present the 464 Mb draft genome assembly of the pea aphid Acyrthosiphon pisum. This first published whole genome sequence of a basal hemimetabolous insect provides an outgroup to the multiple published genomes of holometabolous insects. Pea aphids are host-plant specialists, they can reproduce both sexually and asexually, and they have coevolved with an obligate bacterial symbiont. Here we highlight findings from whole genome analysis that may be related to these unusual biological features. These findings include discovery of extensive gene duplication in more than 2000 gene families as well as loss of evolutionarily conserved genes. Gene family expansions relative to other published genomes include genes involved in chromatin modification, miRNA synthesis, and sugar transport. Gene losses include genes central to the IMD immune pathway, selenoprotein utilization, purine salvage, and the entire urea cycle. The pea aphid genome reveals that only a limited number of genes have been acquired from bacteria; thus the reduced gene count of Buchnera does not reflect gene transfer to the host genome. The inventory of metabolic genes in the pea aphid genome suggests that there is extensive metabolite exchange between the aphid and Buchnera, including sharing of amino acid biosynthesis between the aphid and Buchnera. The pea aphid genome provides a foundation for post-genomic studies of fundamental biological questions and applied agricultural problems.

    Ecological relationships between phytoplankton communities at different spatial scales in European reservoirs: implications at catchment level monitoring programmes.
    Cabecinha, E. ; Brink, P.J. van den; Cabral, J.A. ; Cortes, R. - \ 2009
    Hydrobiologia 628 (2009)1. - ISSN 0018-8158 - p. 27 - 45.
    canonical correspondence-analysis - shallow hypertrophic lake - fresh-water diatoms - land-use - environment relationships - assemblages - framework - streams - landscape - dynamics
    Phytoplankton communities are structured by factors acting over temporal and spatial scales. Identifying which factors are driving spatial patterns in aquatic communities is the central aim of ecology. In this study, data sets of phytoplankton communities and environmental data of two Portuguese reservoirs types (lowland "riverine reservoirs" and higher altitude "artificial lake reservoirs") were used to determine the importance of environmental variables at different spatial (geographical, regional and local) and time scales (seasons, years) on the community structure. In all the data sets, the multivariate ordination technique Canonical Correspondence Analysis (CCA) showed that regional and local scales explained the majority (9¿18% and 13-19%, respectively) of the taxa variance. However, for "riverine reservoirs", time variables were more important, explaining 27% of the variability in phytoplankton assemblages. Variance partitioning was used to assess the individual importance of the three spatial scales and time for the community structure of the two reservoir types. The majority of among-site variability (5.9-21.4%) was accounted for by time variables, with local, regional, and geographical scale variables accounting for 3.3-5.6%, 3.7-4.5% and 2.6-2.9%, respectively. The effects of different spatial scales on phytoplankton communities were clearly interrelated; thus, implying that phytoplankton assemblages are capable of detecting stress from catchment to site scales.
    Management of elasmobranch fisheries in the North Atlantic
    Ellis, J.R. ; Clarke, M.W. ; Cortes, E. ; Heessen, H.J.L. ; Apostolaki, P. ; Carlson, J.K. ; Kulka, D.W. - \ 2008
    In: Advances in fisheries science: 50 years on from Beverton and Holt / Potter , T. Payne, A., Cotter, J., Oxford : Blackwell - ISBN 9781405170833 - p. 184 - 228.
    Measurement of lipid transfer protein in 88 apple cultivars
    Sancho, A.I. ; Ree, R. van; Leeuwen, A. van; Meulenbroek, E.J. ; Weg, W.E. van de; Gilissen, L.J.W.J. ; Puehringer, H. ; Laimer, M. ; Martinelli, A. ; Zaccharini, M. ; Vazquez-Cortes, S. ; Fernandez-Rivas, M. ; Hoffmann-Sommergruber, K. ; Clare Mills, E.N. ; Zuidmeer, L. - \ 2008
    International Archives of Allergy and Immunology 146 (2008)1. - ISSN 1018-2438 - p. 19 - 26.
    oral allergy syndrome - malus-domestica - rosaceae fruits - plant foods - in-vivo - pollen - ige - allergenicity - reactivity - mal-d-3
    Background: Fruits are a major cause of food allergy in adults. Lipid transfer proteins (LTP) are implicated in severe allergic reactions to fruits, but little is known about LTP content in different cultivars. Objective: Determination of the levels of LTP in a wide range of apple cultivars. Methods: LTP was measured in apples from 53 cultivars grown in Italy and 35 grown in The Netherlands, using three different immunoassays: a competitive ELISA (cELISA), a sandwich ELISA (sELISA) and a RAST inhibition (RI). Selected cultivars were evaluated using the basophil histamine release test (BHR), skin prick test (SPT) and double-blind, placebo-controlled food challenge (DBPCFC). Results: LTP levels measured with the three immunoassays were significantly correlated, as judged by Pearson's correlation (0.61
    A Dynamic Simulation Model for Growth of Penaeid shrimps
    Mishra, A.K. ; Verdegem, M.C.J. ; Dam, A.A. van - \ 2002
    In: Avances en Nutrición Acuícola VI. Memorias del VI, Simposium Internacional de Nutrición Acuícola. 3 al 6 de Septiembre del 2002. Cancún, Quintana Roo, México. - - p. 448 - 470.
    Review of structural and functional characteristics of greenhouses in European Union countries. Part II: Typical designs
    Elsner, B. von; Briassoulis, D. ; Waaijenberg, D. ; Mistriotis, A. ; Zabeltitz, Chr. von; Gratraud, J. ; Russo, G. ; Suay-Cortes, R. - \ 2000
    Journal of Agricultural Engineering Research 75 (2000). - ISSN 0021-8634 - p. 2 - 126.
    Review of structural and functional characteristics of greenhouses in European Union countries. Part I: Design requirements
    Elsner, B. von; Briassoulis, D. ; Waaijenberg, D. ; Mistriotis, A. ; Zabeltitz, Chr. von; Gratraud, J. ; Russo, G. ; Suay-Cortes, R. - \ 2000
    Journal of Agricultural Engineering Research 75 (2000). - ISSN 0021-8634 - p. 1 - 16.
    Antigenic structure of the capsid protein of rabbit haemorrhagic disease virus
    Martinez-Torrecuadrada, J.L. ; Cortés, E. ; Vela, C. ; Langeveld, J.P.M. ; Meloen, R.H. ; Dalsgaard, K. ; Hamilton, W.D.O. ; Casal, J.I. - \ 1998
    Journal of General Virology 79 (1998). - ISSN 0022-1317 - p. 1901 - 1909.
    An RT-PCR procedure to amplify S RNA sequences of distinct tospovirus species.
    Cortes, I. ; Pereira, A. ; Goldbach, R. ; Peters, D. ; Kormelink, R. - \ 1998
    In: 4th International Symposium on Tospoviruses and Thrips in floral and Vegetable Crops, Wageningen, The Netherlands - p. 35 - 37.
    Molecular and serological characterization of iris yellow spot virus, a new and distinct tospovirus species.
    Cortes, I. ; Livieratos, I.C. ; Derks, A. ; Peters, D. ; Kormelink, R. - \ 1998
    Phytopathology 88 (1998). - ISSN 0031-949X - p. 1276 - 1282.
    Detection of a novel tospovirus in chrysanthemum.
    Verhoeven, J.T.J. ; Roenhorst, J.W. ; Cortes, I. ; Peters, D. - \ 1996
    Acta Horticulturae 432 (1996). - ISSN 0567-7572 - p. 44 - 51.
    Up to 1994, tomato spotted wilt virus (TSWV) was the only tospovirus species reported in chrysanthemum (Dendranthema morifolium) in the Netherlands. Since then, however, occasionally an aberrant tospovirus was found in this ornamental. The virus evoked symptoms similar to those caused by TSWV, i.e. mild to severe stem necrosis, wilting of leaves and stems, and chlorotic and/or necrotic spots and rings on some of the leaves. The virus was isolated from different cultivars grown in different greenhouses. Test plants mechanically inoculated with this virus, produced symptoms that resemble those caused by TSWV. The most obvious differences were observed in Datura stramonium, in which only the tospovirus from chrysanthemum evoked stem necrosis and in Physalis floridana, in which systemic symptoms were caused by TSWV but not by the chrysanthemum virus. The symptoms produced on Citrullus lanatus ‘Dulzura’, Nicotiana occidentalis-P1 and Phaseolus vulgaris ‘Dubbele Witte zonder draad’ and ‘Pinto’ differ slightly from those caused by TSWV. Lycopersicum esculentum appeared to be less susceptible for this virus than for TSWV. Electron-microscopic studies revealed the presence of tospovirus-like particles in infected plants. In ELISA, however, the tospovirus from chrysanthemum did not react with antisera to the nucleocapsid protein of TSWV, neither to those of Impatiens necrotic spot virus, watermelon silver mottle virus and a tospovirus isolated from iris, respectively. Based on these results it is concluded that the tospovirus from chrysanthemum is a distinct virus that does not belong to any of the established serogroups. Sofar, in each greenhouse in which the first infection of this novel virus was found, chrysanthemum plants were derived from mother plants in Brazil, suggesting that the virus is endemic in South America.
    Peptide vaccine against canine parvovirus: Identification of two neutralization subsites in the N terminus of VP2 and optimization of the amino acid sequence
    Casal, J.I. ; Langeveld, J.P.M. ; Cortes, E. ; Schaaper, W.M.M. ; Dijk, E. van; Vela, C. ; Kamstrup, S. ; Meloen, R.H. - \ 1995
    Journal of Virology 69 (1995). - ISSN 0022-538X - p. 7274 - 7277.
    Field gas exchange laboratory : technical report
    Cortes, P.M. ; Beek, J. van der; Blom, J.H.G. - \ 1988
    Wageningen : De Dorschkamp (Rapport / Rijksinstituut voor Onderzoek in de Bos- en Landschapsbouw "De Dorschkamp" nr. 511) - 106
    meting - instrumenten (meters) - methodologie - technieken - bosbouw - omloop - absorptie - transpiratie - oplossingen - vloeistoffen (liquids) - gassen - evapotranspiratie - experimenteel veldonderzoek - measurement - instruments - methodology - techniques - forestry - circulation - absorption - transpiration - solutions - liquids - gases - evapotranspiration - field experimentation
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