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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Identification and characterization of metabolite quantitative trait loci in tomato leaves and comparison with those reported for fruits and seeds
Nunes-Nesi, Adriano ; Alseekh, Saleh ; Oliveira Silva, Franklin Magnum de; Omranian, Nooshin ; Lichtenstein, Gabriel ; Mirnezhad, Mohammad ; González, Roman R.R. ; y Garcia, Julia Sabio ; Conte, Mariana ; Leiss, Kirsten A. ; Klinkhamer, Peter G.L. ; Nikoloski, Zoran ; Carrari, Fernando ; Fernie, Alisdair R. - \ 2019
Metabolomics 15 (2019)4. - ISSN 1573-3882
Leaf metabolism - Metabolite network - Metabolite QTL - Tomato

Introduction: To date, most studies of natural variation and metabolite quantitative trait loci (mQTL) in tomato have focused on fruit metabolism, leaving aside the identification of genomic regions involved in the regulation of leaf metabolism. Objective: This study was conducted to identify leaf mQTL in tomato and to assess the association of leaf metabolites and physiological traits with the metabolite levels from other tissues. Methods: The analysis of components of leaf metabolism was performed by phenotypying 76 tomato ILs with chromosome segments of the wild species Solanum pennellii in the genetic background of a cultivated tomato (S. lycopersicum) variety M82. The plants were cultivated in two different environments in independent years and samples were harvested from mature leaves of non-flowering plants at the middle of the light period. The non-targeted metabolite profiling was obtained by gas chromatography time-of-flight mass spectrometry (GC-TOF-MS). With the data set obtained in this study and already published metabolomics data from seed and fruit, we performed QTL mapping, heritability and correlation analyses. Results: Changes in metabolite contents were evident in the ILs that are potentially important with respect to stress responses and plant physiology. By analyzing the obtained data, we identified 42 positive and 76 negative mQTL involved in carbon and nitrogen metabolism. Conclusions: Overall, these findings allowed the identification of S. lycopersicum genome regions involved in the regulation of leaf primary carbon and nitrogen metabolism, as well as the association of leaf metabolites with metabolites from seeds and fruits.

How to slow the global spread of small hive beetles, Aethina tumida
Schäfer, M.O. ; Cardaio, Ilaria ; Cilia, Giovanni ; Cornelissen, A.C.M. ; Crailsheim, Karl ; Formato, Giovanni ; Lawrence, A.K. ; Conte, Y. Le; Mutinelli, Franco ; Nanetti, Antonio ; Rivera-Gomis, Jorge ; Teepe, Anneke ; Neumann, P. - \ 2019
Biological Invasions 21 (2019)5. - ISSN 1387-3547 - p. 1451 - 1459.
Apis mellifera - Apiculture - Bees - Contingency plan - Honeybee - Parasite
Small hive beetles (SHBs) are parasites of social bee colonies endemic to sub-Saharan Africa and have become a widespread invasive species. In the new ranges, SHBs can cause damage to apiculture and wild bees. Although the further spread seems inevitable, eradication of new introductions and containment of established ones are nevertheless urgently required to slow down the invasion speed until better mitigation options are available. However, at present there is no adequate action plan at hand. Here, we propose to take advantage of SHB invasion history and biology to enrol a feasible plan involving all stakeholders. Raising awareness, education and motivation of stakeholders (incl. adequate and timely compensation of beekeepers) is essential for success. Moreover, sentinel apiaries are recommended in areas at risk, because early detection is crucial for the success of eradication efforts. Given that introductions are detected early, SHB eradication is recommended, incl. destruction of all infested apiaries, installation of sentinel colonies to lure escaped SHBs and a ban on migratory beekeeping. If wild perennial social bee colonies are infested, eradication programs are condemned to fail and a strategic switch to a containment strategy is recommended. Containment includes adequate integrated pest management and a strict ban on migratory beekeeping. Despite considerable gaps in our knowledge of SHBs, the proposed action plan will help stakeholders to slow down the global spread of SHBs.
Integrating methods for ecosystem service assessment : Experiences from real world situations
Dunford, Rob ; Harrison, Paula ; Smith, Alison ; Dick, Jan ; Barton, David N. ; Martin-Lopez, Berta ; Kelemen, Ezsther ; Jacobs, Sander ; Saarikoski, Heli ; Turkelboom, Francis ; Verheyden, Wim ; Hauck, Jennifer ; Antunes, Paula ; Aszalós, Réka ; Badea, Ovidu ; Baró, Francesc ; Berry, Pam ; Carvalho, Laurence ; Conte, Giulio ; Czúcz, Bálint ; Garcia Blanco, Gemma ; Howard, Dave ; Giuca, Relu ; Gomez-Baggethun, Erik ; Grizetti, Bruna ; Izakovicova, Zita ; Kopperoinen, Leena ; Langemeyer, Johannes ; Luque, Sandra ; Lapola, David M. ; Martinez-Pastur, Guillermo ; Mukhopadhyay, Raktima ; Roy, S.B. ; Niemelä, Jari ; Norton, Lisa ; Ochieng, John ; Odee, David ; Palomo, Ignacio ; Pinho, Patricia ; Priess, Joerg ; Rusch, Graciella ; Saarela, Sanna Riikka ; Santos, Rui ; Wal, Jan Tjalling van der; Vadineanu, Angheluta ; Vári, Ágnes ; Woods, Helen ; Yli-Pelkonen, Vesa - \ 2018
Ecosystem Services 29 (2018)pt. C. - ISSN 2212-0416 - p. 499 - 514.
The Ecosystem Services (ES) concept highlights the varied contributions the environment provides to humans and there are a wide range of methods/tools available to assess ES. However, in real-world decision contexts a single tool is rarely sufficient and methods must be combined to meet practitioner needs. Here, results from the OpenNESS project are presented to illustrate the methods selected to meet the needs of 24 real-world case studies and better understand why and how methods are combined to meet practical needs. Results showed that within the cases methods were combined to: i) address a range of ES; ii) assess both supply and demand of ES; iii) assess a range of value types; iv) reach different stakeholder groups v) cover weaknesses in other methods used and vi) to meet specific decision context needs. Methods were linked in a variety of ways: i) as input-output chains of methods; ii) through learning; iii) through method development and iv) through comparison/triangulation of results. The paper synthesises these case study-based experiences to provide insight to others working in practical contexts as to where, and in what contexts, different methods can be combined and how this can add value to case study analyses.
Spatial and temporal dynamics of shifting cultivation in the middle-Amazonas river : Expansion and intensification
Jakovac, Catarina Conte ; Dutrieux, Loic ; Siti, Latifah ; Peña-Claros, Marielos ; Bongers, Frans - \ 2017
PLoS ONE 12 (2017)7. - ISSN 1932-6203
Shifting cultivation is the main land-use system transforming landscapes in riverine Amazonia. Increased concentration of the human population around villages and increasing market integration during the last decades may be causing agricultural intensification. Studies have shown that agricultural intensification, i.e. higher number of swidden-fallow cycles and shorter fallow periods, reduces crop productivity of swiddens and the regrowth capacity of fallows, undermining the resilience of the shifting cultivation system as a whole. We investigated the temporal and spatial dynamics of shifting cultivation in Brazilian Amazonia to test the hypotheses that (i) agriculture has become more intensive over time, and (ii) patterns of land-use intensity are related to land accessibility and human population density. We applied a breakpoint-detection algorithm to Landsat time-series spanning three decades (1984–2015) and retrieved the temporal dynamics of shifting cultivation fields, which go through alternating phases of crop production (swidden) and secondary forest regrowth (fallow). We found that fallow-period length has decreased from 6.4 to 5.1 years on average, and that expansion over old-growth forest has slowed down over time. Shorter fallow periods and higher frequency of slash and burn cycles are practiced closer to residences and around larger villages. Our results indicate that shifting cultivation in riverine Amazonia has gone through a process of agricultural intensification in the past three decades. The resulting landscape is predominantly covered by young secondary forests (≤ 12 yrs old), and 20% of it have gone through intensive use. Reversing this trend and avoiding the negative consequences of agricultural intensification requires land use planning that accounts for the constraints of land use in riverine areas.
Floodplains as an Achilles' heel of Amazonian forest resilience
Flores, Bernardo M. ; Holmgren Urba, Milena ; Xu, Chi ; Nes, Egbert H. van; Conte Jakovac, Catarina ; Mesquita, Rita C.G. ; Scheffer, Marten - \ 2017
Proceedings of the National Academy of Sciences of the United States of America 114 (2017)17. - ISSN 0027-8424 - p. 4442 - 4446.
Climate change - Drought - Fire - Tropical forest - Tropical savanna

The massive forests of central Amazonia are often considered relatively resilient against climatic variation, but this view is challenged by the wildfires invoked by recent droughts. The impact of such fires that spread from pervasive sources of ignition may reveal where forests are less likely to persist in a drier future. Here we combine field observations with remotely sensed information for the whole Amazon to show that the annually inundated lowland forests that run through the heart of the system may be trapped relatively easily into a fire-dominated savanna state. This lower forest resilience on floodplains is suggested by patterns of tree cover distribution across the basin, and supported by our field and remote sensing studies showing that floodplain fires have a stronger and longer-lasting impact on forest structure as well as soil fertility. Although floodplains cover only 14% of the Amazon basin, their fires can have substantial cascading effects because forests and peatlands may release large amounts of carbon, and wildfires can spread to adjacent uplands. Floodplains are thus an Achilles' heel of the Amazon system when it comes to the risk of large-scale climatedriven transitions.

Land use as a filter for species composition in Amazonian secondary forests
Conte Jakovac, Catarina ; Bongers, Frans ; Kuijper, Thomas ; Mesquita, Rita C.G. ; Peña-Claros, Marielos - \ 2016
Journal of Vegetation Science 27 (2016)6. - ISSN 1100-9233 - p. 1104 - 1116.
Brazil - Cecropia - Fire - Landscape composition - Phosphorus - Slash-and-burn - Soil - Sprouting - Succession - Vismia - α-Diversity - β-Diversity

Questions: Secondary succession in the tropics can follow alternative pathways. Land-use history is known to engender alternative successional communities, but the underlying mechanisms driving and sustaining divergence remain unclear. In this study we aim to answer the following questions: (1) does previous land use act as a filter for species composition in secondary forests; and (2) what are the relative roles of management practices, soil properties and landscape composition in determining species composition?. Location: Central Amazon, Brazil. Methods: We sampled trees, shrubs and palms (≥1cm diameter) in 38 early secondary forests (5 yr after abandonment) located along gradients of land-use intensity in five shifting cultivation landscapes. We measured the diameter and height of each sampled plant, identified it to species or morpho-species level and checked if it was resprouting or not. At each secondary forest we also collected soil samples for chemical and physical analyses and estimated the amount of old-growth forest surrounding it (landscape composition). Results: We found that previous land-use intensity determined species composition. With increasing land-use intensity, management practices of cut-and-burn and associated reduction in soil quality filtered out seed-dependent species and favoured strong sprouters and species that can cope with low nutrient availability. Landscape composition had a weak effect on species assemblages. We found specific species assemblages and indicator species associated with different levels of previous land-use intensity. As a consequence of these local filters, species α- and β-diversity decreased and therefore early successional communities became more similar to each other. Conclusion: Species composition of successional forests is strongly determined by different land-use intensities. Dispersal limitation has a limited effect on determining the composition of the dominant species. Filtering effects of management practices and soil quality determine the species dominating the canopy at early stages of succession and narrow down the range of species able to colonize and establish. This study highlights how land use shapes successional communities and suggests that alternative successional pathways are determined at early stages of succession. Therefore, accounting for land-use history is crucial to improve the understanding of tropical secondary succession. We present a list of indicator species for different levels of previous land-use intensity that can be used to support conservation and restoration decisions in the Amazon.

Fighting Food Fraud : Horsemeat Scandal; Use of Recalls in Enforcement throughout the EU
Meulen, S. van der; Boin, G. ; Bousoula, I. ; Conte-Salinas, N. ; Paganizza, V. ; Montanari, F. ; Rodriquez Fuentes, V. ; Meulen, B.M.J. van der - \ 2015
European Food and Feed Law Review 10 (2015)01. - ISSN 1862-2720 - p. 2 - 13.
To cover up the horsemeat fraud, criminal food business operators tempered with their bookkeeping. This adversely affected the traceability of horsemeat and beef alike. This article assesses to what extent national food safety authorities in seven EU Member States issued recall orders to deal with this situation. Since no measurable food safety problems have been found, several countries consider that the conditions of Article 19 of Regulation 178/2002 have not been met. In some of these countries recalls orders, nevertheless, were issued based on national food law that has a wider scope. Other countries consider disruption of traceability sufficient justification to invoke Article 19.
Standard methods for toxicology research in Apis mellifera
Medrzycki, P. ; Giffard, H. ; Aupinel, P. ; Belzunces, L.P. ; Chauzat, M.P. ; Classen, C. ; Colin, M.E. ; Dupont, T. ; Girolami, V. ; Johnson, R. ; Conte, Y. Le; Luckmann, J. ; Marzaro, M. ; Pistorius, J. ; Porrini, C. ; Schur, A. ; Sgolastra, F. ; Delso, N.S. ; Steen, J.J.M. van der; Wallner, K. ; Alaux, C. ; Biron, D.G. ; Blot, N. ; Bogo, G. ; Brunet, J.L. ; Delbac, F. ; Diogon, M. ; Alaoui, H. El; Provost, B. ; Tosi, S. ; Vidau, C. - \ 2013
Journal of Apicultural Research 52 (2013)4. - ISSN 0021-8839
honey-bees hymenoptera - size field colonies - free-flying colonies - parathion penncap-m - neonicotinoid insecticides - systemic insecticides - nosema-ceranae - pesticide sensitivity - pollen availability - rearing temperature
Modern agriculture often involves the use of pesticides to protect crops. These substances are harmful to target organisms (pests and pathogens). Nevertheless, they can also damage non-target animals, such as pollinators and entomophagous arthropods. It is obvious that the undesirable side effects of pesticides on the environment should be reduced to a minimum. Western honey bees (Apis mellifera) are very important organisms from an agricultural perspective and are vulnerable to pesticide-induced impacts. They contribute actively to the pollination of cultivated crops and wild vegetation, making food production possible. Of course, since Apis mellifera occupies the same ecological niche as many other species of pollinators, the loss of honey bees caused by environmental pollutants suggests that other insects may experience a similar outcome. Because pesticides can harm honey bees and other pollinators, it is important to register pesticides that are as selective as possible. In this manuscript, we describe a selection of methods used for studying pesticide toxicity/selectiveness towards Apis mellifera. These methods may be used in risk assessment schemes and in scientific research aimed to explain acute and chronic effects of any target compound on Apis mellifera.
Blame on Them, Shame on Us
Ferreira, N. ; Mascarenhas, S. ; Paiva, A. ; Tosto, G. Di; Dignum, F. ; McBreen, J. ; Degens, D.M. ; Hofstede, G.J. ; Andrighetto, G. ; Conte, R. - \ 2013
An Agent Model for the Appraisal of Normative Events Based in In-Group and Out-Group Relations
Ferreira, N. ; Mascarenhas, S. ; Paiva, A. ; Tosto, G. Di; Dignum, F. ; McBreen, J. ; Degens, D.M. ; Hofstede, G.J. ; Andrighetto, G. ; Conte, R. - \ 2013
Climate change and the spread of vector-borne diseases: using approximate Bayesian computation to compare invasion scenarios for the bluetongue virus vector Culicoides imicola in Italy
Mardulyn, P. ; Goffredo, M. ; Conte, A. ; Hendrickx, G. ; Meiswinkel, R. ; Balenghien, T. ; Sghaier, S. ; Lohr, Y. ; Gilbert, M. - \ 2013
Molecular Ecology 22 (2013)9. - ISSN 0962-1083 - p. 2456 - 2466.
multilocus genotype data - chain monte-carlo - population-structure - mediterranean basin - entomological surveillance - statistical evaluation - expanding populations - genetic diversity - range expansion - history
Bluetongue (BT) is a commonly cited example of a disease with a distribution believed to have recently expanded in response to global warming. The BT virus is transmitted to ruminants by biting midges of the genus Culicoides, and it has been hypothesized that the emergence of BT in Mediterranean Europe during the last two decades is a consequence of the recent colonization of the region by Culicoides imicola and linked to climate change. To better understand the mechanism responsible for the northward spread of BT, we tested the hypothesis of a recent colonization of Italy by C. imicola, by obtaining samples from more than 60 localities across Italy, Corsica, Southern France, and Northern Africa (the hypothesized source point for the recent invasion of C. imicola), and by genotyping them with 10 newly identified microsatellite loci. The patterns of genetic variation within and among the sampled populations were characterized and used in a rigorous approximate Bayesian computation framework to compare three competing historical hypotheses related to the arrival and establishment of C. imicola in Italy. The hypothesis of an ancient presence of the insect vector was strongly favoured by this analysis, with an associated P = 99%, suggesting that causes other than the northward range expansion of C. imicola may have supported the emergence of BT in southern Europe. Overall, this study illustrates the potential of molecular genetic markers for exploring the assumed link between climate change and the spread of diseases.
Chronic Wasting Disease in Bank Voles: Characterisation of the Shortest Incubation Time Model for Prion Diseases
Bari, M.A. Di; Nonno, R. ; Castilla, J. ; Augostino, C. D'; Pirisinu, L. ; Riccardi, G. ; Conte, M. ; Richt, J.A. ; Kunkle, R. ; Langeveld, J.P.M. ; Vaccari, G. ; Agrimi, U. - \ 2013
PLoS Pathogens 9 (2013)3. - ISSN 1553-7366
chromatography-mass spectrometry - misfolding cyclic amplification - creutzfeldt-jakob-disease - cervus-elaphus-nelsoni - in-vitro generation - transgenic mice - spongiform encephalopathy - mule deer - species-barrier - protein allotypes
In order to assess the susceptibility of bank voles to chronic wasting disease (CWD), we inoculated voles carrying isoleucine or methionine at codon 109 (Bv109I and Bv109M, respectively) with CWD isolates from elk, mule deer and white-tailed deer. Efficient transmission rate (100%) was observed with mean survival times ranging from 156 to 281 days post inoculation. Subsequent passages in Bv109I allowed us to isolate from all CWD sources the same vole-adapted CWD strain (Bv109ICWD), typified by unprecedented short incubation times of 25–28 days and survival times of ~35 days. Neuropathological and molecular characterisation of Bv109ICWD showed that the classical features of mammalian prion diseases were all recapitulated in less than one month after intracerebral inoculation. Bv109ICWD was characterised by a mild and discrete distribution of spongiosis and relatively low levels of protease-resistant PrPSc (PrPres) in the same brain regions. Despite the low PrPres levels and the short time lapse available for its accumulation, end-point titration revealed that brains from terminally-ill voles contained up to 108,4 i.c. ID50 infectious units per gram. Bv109ICWD was efficiently replicated by protein misfolding cyclic amplification (PMCA) and the infectivity faithfully generated in vitro, as demonstrated by the preservation of the peculiar Bv109ICWD strain features on re-isolation in Bv109I. Overall, we provide evidence that the same CWD strain was isolated in Bv109I from the three-cervid species. Bv109ICWD showed unique characteristics of “virulence”, low PrPres accumulation and high infectivity, thus providing exceptional opportunities to improve basic knowledge of the relationship between PrPSc, neurodegeneration and infectivity.
A high-resolution map of the Nile tilapia genome: a resource for studying cichlids and other percomorphs
Guyon, R. ; Rakotomanga, M. ; Azzouzi, N. ; Coutanceau, J.P. ; Bonillo, C. ; Cotta, H. D'; Pepey, E. ; Soler, L. ; Rodier-Goud, M. ; Hont, A. D'; Conte, M.A. ; Bers, N.E.M. van; Penman, D.J. ; Hitte, C. ; Crooijmans, R.P.M.A. ; Kocher, T.D. ; Ozouf-Costaz, C. ; Baroiller, J.F. ; Galibert, F. - \ 2012
BMC Genomics 13 (2012). - ISSN 1471-2164
radiation hybrid map - genetic-linkage map - oreochromis-niloticus - sex determination - tetraodon-nigroviridis - zebrafish genome - fish - sequence - construction - evolution
Background: The Nile tilapia (Oreochromis niloticus) is the second most farmed fish species worldwide. It is also an important model for studies of fish physiology, particularly because of its broad tolerance to an array of environments. It is a good model to study evolutionary mechanisms in vertebrates, because of its close relationship to haplochromine cichlids, which have undergone rapid speciation in East Africa. The existing genomic resources for Nile tilapia include a genetic map, BAC end sequences and ESTs, but comparative genome analysis and maps of quantitative trait loci (QTL) are still limited. Results: We have constructed a high-resolution radiation hybrid (RH) panel for the Nile tilapia and genotyped 1358 markers consisting of 850 genes, 82 markers corresponding to BAC end sequences, 154 microsatellites and 272 single nucleotide polymorphisms (SNPs). From these, 1296 markers could be associated in 81 RH groups, while 62 were not linked. The total size of the RH map is 34,084 cR(3500) and 937,310 kb. It covers 88% of the entire genome with an estimated inter-marker distance of 742 Kb. Mapping of microsatellites enabled integration to the genetic map. We have merged LG8 and LG24 into a single linkage group, and confirmed that LG16-LG21 are also merged. The orientation and association of RH groups to each chromosome and LG was confirmed by chromosomal in situ hybridizations (FISH) of 55 BACs. Fifty RH groups were localized on the 22 chromosomes while 31 remained small orphan groups. Synteny relationships were determined between Nile tilapia, stickleback, medaka and pufferfish. Conclusion: The RH map and associated FISH map provide a valuable gene-ordered resource for gene mapping and QTL studies. All genetic linkage groups with their corresponding RH groups now have a corresponding chromosome which can be identified in the karyotype. Placement of conserved segments indicated that multiple inter-chromosomal rearrangements have occurred between Nile tilapia and the other model fishes. These maps represent a valuable resource for organizing the forthcoming genome sequence of Nile tilapia, and provide a foundation for evolutionary studies of East African cichlid fishes.
Potential damage costs of Diabrotica virgifera virgifera infestation in Europe - the 'no control' scenario
Wesseler, J.H.H. ; Fall, E.H. - \ 2010
Journal of Applied Entomology 134 (2010)5. - ISSN 0931-2048 - p. 385 - 394.
western corn-rootworm - yield
he Western Corn Rootworm (WCR or Dvv., Diabrotica virgifera virgifera Le Conte) was first detected in Europe in the early nineties in Serbia. Since then the beetle has spread to more than 15 European countries. We assess the potential damage costs of the invasive species Diabrotica virgifera virgifera LeConte (Dvv.) in Europe under a 'no control' scenario. While previous studies considered benefits and costs at country level, this study explicitly investigates the external benefits of control in one country for other countries. The assessment considers the spatial and temporal aspects of invasion considering a number of scenarios developed together with experts. The results indicate enormous economic benefits can be gained by controlling further spread of Dvv. The economic benefits of control range between 143 million Euro in the best case and 1739 million Euro in the worst case scenario. The most likely scenario results in average annual economic benefits of 472 million Euro. Even in countries that do not face high damage costs control can be justified as this will reduce the speed of spread of the WCR and generate a positive externality for other regions with higher damage costs.
The Culicoides 'snapshot': a novel approach used to assess vector densities widely and rapidly during the 2006 outbreak of bluetongue in The Netherlands
Meiswinkel, R. ; Goffredo, M. ; Leijs, P. ; Conte, M. - \ 2008
Preventive Veterinary Medicine 87 (2008)1-2. - ISSN 0167-5877 - p. 98 - 118.
ribosomal dna-sequences - subgenus avaritia fox - obsoletus complex - virus - ceratopogonidae - diptera - identification - europe - epidemiology - infection
A novel method was developed and implemented during the recent outbreak of bluetongue (BT) in sheep and cattle in The Netherlands to obtain rapidly a `snapshot¿ of Culicoides vector densities at the national level. The country was divided into 110 raster cells, each measuring 20 km × 20 km; within 106 of these cells, a farm was selected with a minimum of 10 cattle and sampled for Culicoides for one night only using the Onderstepoort-type blacklight trap. Prior to deployment of the light traps in the field, local veterinarians were trained in their use and in the preservation of captured Culicoides. The collections were despatched daily by courier to a field laboratory where the Culicoides were counted and identified. The `snapshot¿ commenced on 12 September 2006 and was completed on 28 September coinciding with the 5¿7 weeks of BT virus (BTV) activity in The Netherlands and when the number of weekly cases of disease was on the rise. Analysis of the 106 collections was completed on 5 October. The number of grid cells in which a taxon occurred is represented by the index 202 gFR (=20 km × 20 km grid Frequency Rate); this index essentially reflects the percentage of examined raster cells found to contain the potential vector in question. The `snapshot¿ results can be summarised as follows:
The Generation Challenge Programme comparative plant stress-responsive gene catalogue
Wanchana, S. ; Thongjuea, S. ; Ulat, V.J. ; Anacleto, M. ; Mauleon, R. ; Conte, M. ; Rouard, M. ; Ruiz, M. ; Krishnamurthy, N. ; Sjolander, K. ; Hintum, T.J.L. van; Bruskiewich, R.M. - \ 2008
Nucleic acids research 36 (2008). - ISSN 0305-1048 - p. D943 - D946.
phylogenomic inference - expression patterns - alignment - genomics
The Generation Challenge Programme (GCP; has developed an online resource documenting stress-responsive genes comparatively across plant species. This public resource is a compendium of protein families, phylogenetic trees, multiple sequence alignments (MSA) and associated experimental evidence. The central objective of this resource is to elucidate orthologous and paralogous relationships between plant genes that may be involved in response to environmental stress, mainly abiotic stresses such as water deficit (`drought¿). The web-based graphical user interface (GUI) of the resource includes query and visualization tools that allow diverse searches and browsing of the underlying project database. The web interface can be accessed at
Elemental quantitation of natural organic matter by CPMAS C-13 NMR spectroscopy
Conte, P. ; Piccolo, A. ; Lagen, B. van; Buurman, P. ; Hemminga, M.A. - \ 2002
Solid state nuclear magnetic resonance 21 (2002). - ISSN 0926-2040 - p. 3 - 4.
bodemchemie - organische stof - chemische analyse - kernmagnetische resonantiespectroscopie - soil chemistry - organic matter - chemical analysis - nuclear magnetic resonance spectroscopy
Elemental quantification of natural organic matter by cpmas 13c nmr spectroscopy
Conte, P. ; Piccolo, A. ; Lagen, B. van; Buurman, P. ; Hemminga, M.A. - \ 2002
Solid state nuclear magnetic resonance 21 (2002). - ISSN 0926-2040 - p. 158 - 170.
Reduced heterogeneity of a lignite humic acid by preparative HPSEC following interaction with an organic acid. Characterization of size-separates by pyr-gc-ms and 1h-nmr spectroscopy
Piccolo, A. ; Conte, P. ; Trivellone, E. ; Lagen, B. van; Buurman, P. - \ 2002
Environmental Science and Technology 36 (2002). - ISSN 0013-936X - p. 76 - 84.
bodemchemie - humus - chemische analyse - gc-ms - kernmagnetische resonantie - soil chemistry - chemical analysis - nuclear magnetic resonance
Genetic modification for crop protection - pros and cons
Zadoks, J.C. - \ 2001
In: Book of Abstracts: Genetically modified organisms: doubts and certainties, Porto Conte Ricerche, Tramariglio, Alghero (Sardinia) , Italy, 19-20 October 2001
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