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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Epigenetic Dynamics in Plants Species with Different Reproductive Modes
Antro, Morgane van; Verhoeven, Koen - \ 2018
Grondig boeren met maïs
Verhoeven, John - \ 2018
Grondig boeren met maïs
Verhoeven, John - \ 2018
Angst, woede en wantrouwen over gaswinning : hoe Groningse politici emotioneel schakelen tussen burgers en Den Haag
Verhoeven, I. ; Metze, T.A.P. - \ 2018
In: Het hart op de tong / Swierstra, Tsjalling, Koenis, Sjaak, Gabriëls, René, Amsterdam University Press - ISBN 9789463723312
CO2-uitstoot in veenweide ongrijpbaar
Verhoeven, John - \ 2018
Alstroemeria yellow spot virus (AYSV) : a new orthotospovirus species within a growing Eurasian clade
Hassani-Mehraban, A. ; Dullemans, A.M. ; Verhoeven, J.Th.J. ; Roenhorst, J.W. ; Peters, D. ; Vlugt, R.A.A. van der; Kormelink, R. - \ 2018
Archives of Virology (2018). - ISSN 0304-8608 - 10 p.

An orthotospovirus distinct from all other orthotospoviruses was isolated from naturally infected alstroemeria plants. Disease symptoms caused by this virus mainly consisted of yellow spots on the leaves based on which the name alstroemeria yellow spot virus (AYSV) was coined. A host range analysis was performed and a polyclonal antiserum was produced against purified AYSV ribonucleoproteins which only reacted with the homologous antigen and not with any other (established or tentative) orthotospovirus from a selection of American and Asian species. Upon thrips transmission assays the virus was successfully transmitted by a population of Thrips tabaci. The entire nucleotide sequence of the M and S RNA segments was elucidated by a conventional cloning and sequencing strategy, and contained 4797 respectively 2734 nucleotides (nt). Simultaneously, a next generation sequencing (NGS) approach (RNAseq) was employed and generated contigs covering the entire viral tripartite RNA genome. In addition to the M and S RNA nucleotide sequences, the L RNA (8865 nt) was obtained. The nucleocapsid (N) gene encoded by the S RNA of this virus consisted of 819 nucleotides with a deduced N protein of 272 amino acids and by comparative sequence alignments to other established orthotospovirus species showed highest homology (69.5% identity) to the N protein of polygonum ringspot virus. The data altogether support the proposal of AYSV as a new orthotospovirus species within a growing clade of orthotospoviruses that seem to share the Middle East basin as a region of origin.

Data from: Increased transgenerational epigenetic variation, but not predictable epigenetic variants, after environmental exposure in two apomictic dandelion lineages
Preite, Veronica ; Oplaat, Carla ; Biere, Arjen ; Kirschner, Jan ; Putten, W.H. van der; Verhoeven, Koen J.F. - \ 2018
DNA methylation - stress memory - drought - salicylic acid
DNA methylation is one of the mechanisms underlying epigenetic modifications. DNA methylations can be environmentally induced and such induced modifications can at times be transmitted to successive generations. However, it remains speculative how common such environmentally induced transgenerational DNA methylation changes are and if they persist for more than one offspring generation. We exposed multiple accessions of two different apomictic dandelion lineages of the Taraxacum officinale group (Taraxacum alatum and T. hemicyclum) to drought and salicylic acid (SA) treatment. Using methylation-sensitive amplified fragment length polymorphism markers (MS-AFLPs) we screened anonymous methylation changes at CCGG restriction sites throughout the genome after stress treatments and assessed the heritability of induced changes for two subsequent unexposed offspring generations. Irrespective of the initial stress treatment, a clear buildup of heritable DNA methylation variation was observed across three generations, indicating a considerable background rate of heritable epimutations. Less evidence was detected for environmental effects. Drought stress showed some evidence for accession-specific methylation changes, but only in the exposed generation and not in their offspring. By contrast, SA treatment caused an increased rate of methylation change in offspring of treated plants. These changes were seemingly undirected resulting in increased transgenerational epigenetic variation between offspring individuals, but not in predictable epigenetic variants. While the functional consequences of these MS-AFLP-detected DNA methylation changes remain to be demonstrated, our study shows that (1) stress-induced transgenerational DNA methylation modification in dandelions is genotype and context-specific; and (2) inherited environmental DNA methylation effects are mostly undirected and not targeted to specific loci.
Flourishing Foodscapes - Designing City-Region Food Systems
Wiskerke, Han - \ 2018
Saline Verhoeven and Han Wiskerke (lecturer Foodscapes at the Academy of Architecture between 2013 and 2016) will present their publication Flourishing Foodscapes on Thursday 27 September. The first copy will be handed over to Hanneke Kijne, the new head of Landscape Architecture at the Academy of Architecture.
Flourishing Foodscapes : Designing City-Region Food Systems
Wiskerke, J.S.C. ; Verhoeven, Saline - \ 2018
Amsterdam : - ISBN 9789492095381 - 296 p.
The term ‘foodscapes’—a combination of food and landscape—refers to the social and spatial organization of networks and systems of food provisioning. In other words, the physical places and social practices of food production, food processing, distribution, sales, reparation,
and consumption. Creating future-proof food systems is about addressing its social, economic, and ecological vulnerabilities and sustainabilities, as well as how the spatial qualities of the rural and urban landscape and its use need to adapt and change. Food not only has to do with nutrition, but influences a multitude of domains; from health to (eating) culture and from employment to climate change. It has a major impact on the city (especially on consumption and distribution, and, to a lesser extent, on production) and on rural areas (mainly production), but also the relations between city and countryside, close by as well as far apart. Thinking about food-related problems and challenges is becoming increasingly important. These issues influence our planet and way of life, but also our everyday existence. Flourishing Foodscapes transcends the field of bottom-up initiatives and private projects. If we really want to design more sustainable food systems, we will have to think more structurally about changing food provisioning at different levels of scale. Flourishing Foodscapes links research, case studies and spatial design and takes a step towards a more comprehensive approach to food issues, building on inspiring practices, projects and designs from all over the world.
Introduction
Wiskerke, J.S.C. ; Verhoeven, Saline - \ 2018
In: Flourishing Foodscapes / Wiskerke, J.S.C., Verhoeven, Saline, Amsterdam : - ISBN 9789492095381 - p. 9 - 16.
The Spatiality of Food Provisioning
Wiskerke, J.S.C. ; Verhoeven, Saline - \ 2018
In: Flourishing Foodscapes / Wiskerke, J.S.C., Verhoeven, Saline, Amsterdam : - ISBN 9789492095381 - p. 17 - 38.
Plant functional diversity and nutrient availability can improve restoration of floating fens via facilitation, complementarity and selection effects
Zuidam, Jeroen P. van; Leeuwen, Casper H.A. van; Bakker, Elisabeth S. ; Verhoeven, Jos T.A. ; Ijff, Stéphanie ; Peeters, Edwin T.H.M. ; Zuidam, Bastiaan G. van; Soons, Merel B. - \ 2018
Journal of Applied Ecology (2018). - ISSN 0021-8901
assisted colonization - floating fen - functional diversity - peat formation - restoration - rhizome formation - terrestrialization - wetlands

Peat-forming wetlands, particularly floating fens that form the initial stages of these ecosystems, are declining globally due to excavation, dehydration and eutrophication. Restoration typically involves reestablishment of early-successional open-water stages, with oligotrophic conditions that are characteristic for these systems. However, restoration success is notoriously limited. A potential improvement may be to initiate succession by reintroducing of target plant species. Knowledge is therefore needed on (a) which plant functional groups should be re-introduced to stimulate fen formation; and (b) how to manage nutrient levels during restoration, considering that plant growth may be slow in oligotrophic conditions. We hypothesized that increasing functional diversity of introduced species would stimulate the formation of peat-forming target communities, their biomass accumulation and expansion onto open water. We also hypothesized that nutrient availability would mediate the relative contribution of specific functional groups to these effects. We investigated this in 36 artificial outdoor ponds by manipulating plant functional diversity (clonal dominants, clonal stress-tolerators and interstitials) on constructed rafts with fen-forming communities, and subjected these to a range of nutrient loadings over 2 years. Increasing functional diversity as well as increasing nutrient loadings had stimulating effects on plant biomass accumulation, cover formation and rhizome growth onto open water. Both complementarity (due to niche partitioning or facilitation) and selection effects were mechanisms underlying the diversity effect, with a constant relative importance over the entire range of nutrient availabilities. Different functional groups were important for biomass production at different nutrient availabilities. Rhizome formation by clonal stress-tolerators contributed disproportionately to open water colonization, identifying this functional group as key across all nutrient levels. Synthesis and applications. Restoration of floating fen communities can be stimulated during the first 2 years by introducing a high functional diversity of plant species. There include fast-growing clonal species, clonal stress-tolerators and interstitials, which facilitate each other. Restoration is dependent on the presence of clonal stress-tolerators such as Calla palustris, Comarum palustre and Menyanthes trifoliata for expansion onto the open water. Furthermore, restoration can start under a wide range of water nutrient levels, including eutrophic conditions.

City Region Perspective
Wiskerke, J.S.C. ; Verhoeven, Saline - \ 2018
In: Flourishing Foodscapes / Wiskerke, J.S.C., Verhoeven, Saline, Amsterdam : - ISBN 9789492095381 - p. 39 - 46.
Linking Scales
Wiskerke, J.S.C. ; Verhoeven, Saline ; Wegerif, M.C.A. - \ 2018
In: Flourishing Foodscapes / Wiskerke, J.S.C., Verhoeven, Saline, Amsterdam : - ISBN 9789492095381 - p. 83 - 98.
Connecting Flows
Wiskerke, J.S.C. ; Verhoeven, Saline - \ 2018
In: Flourishing Foodscapes / Wiskerke, J.S.C., Verhoeven, Saline, Amsterdam : - ISBN 9789492095381 - p. 137 - 144.
San Francisco: A Zero-Waste City by 2020
Verhoeven, Saline ; Wiskerke, J.S.C. - \ 2018
In: Flourishing Foodscapes / Wiskerke, J.S.C., Verhoeven, Saline, Amsterdam : - ISBN 9789492095381 - p. 159 - 164.
Spatial Diversity
Wiskerke, J.S.C. ; Verhoeven, Saline - \ 2018
In: Flourishing Foodscapes / Wiskerke, J.S.C., Verhoeven, Saline, Amsterdam : - ISBN 9789492095381 - p. 173 - 180.
Food Utopias
Wiskerke, J.S.C. ; Verhoeven, Saline - \ 2018
In: Flourishing Foodscapes / Wiskerke, J.S.C., Verhoeven, Saline, Amsterdam : - ISBN 9789492095381 - p. 211 - 218.
Redesigning the Foodscape of the Metropolitan Region of Amsterdam
Verhoeven, Saline ; Wiskerke, J.S.C. - \ 2018
In: Flourishing Foodscapes / Wiskerke, J.S.C., Verhoeven, Saline, Amsterdam : - ISBN 9789492095381 - p. 219 - 235.
Socio-Spatial Design
Wiskerke, J.S.C. ; Verhoeven, Saline - \ 2018
In: Flourishing Foodscapes / Wiskerke, J.S.C., Verhoeven, Saline, Amsterdam : - ISBN 9789492095381 - p. 275 - 285.
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