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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Diaporthe diversity and pathogenicity revealed from a broad survey of grapevine diseases in europe
Guarnaccia, V. ; Groenewald, J.Z. ; Woodhall, J. ; Armengol, J. ; Cinelli, T. ; Eichmeier, A. ; Ezra, D. ; Fontaine, F. ; Gramaje, D. ; Gutierrez-Aguirregabiria, A. ; Kaliterna, J. ; Kiss, L. ; Larignon, P. ; Luque, J. ; Mugnai, L. ; Naor, V. ; Raposo, R. ; Sándor, E. ; Váczy, K.Z. ; Crous, P.W. - \ 2018
Persoonia 40 (2018). - ISSN 0031-5850 - p. 135 - 153.
Canker - Multi-locus sequence typing - Pathogenicity - Vitis

Species of Diaporthe are considered important plant pathogens, saprobes, and endophytes on a wide range of plant hosts. Several species are well-known on grapevines, either as agents of pre-or post-harvest infections, including Phomopsis cane and leaf spot, cane bleaching, swelling arm and trunk cankers. In this study we explore the occurrence, diversity and pathogenicity of Diaporthe spp. associated with Vitis vinifera in major grape production areas of Europe and Israel, focusing on nurseries and vineyards. Surveys were conducted in Croatia, Czech Republic, France, Hungary, Israel, Italy, Spain and the UK. A total of 175 Diaporthe strains were isolated from asymptomatic and symptomatic shoots, branches and trunks. A multi-locus phylogeny was established based on five genomic loci (ITS, tef1, cal, his3 and tub2), and the morphological characters of the isolates were determined. Preliminary pathogenicity tests were performed on green grapevine shoots with representative isolates. The most commonly isolated species were D. eres and D. ampelina. Four new Diaporthe species described here as D. bohemiae, D. celeris, D. hispaniae and D. hungariae were found associated with affected vines. Pathogenicity tests revealed D. baccae, D. celeris, D. hispaniae and D. hungariae as pathogens of grapevines. No symptoms were caused by D. bohemiae. This study represents the first report of D. ambigua and D. baccae on grapevines in Europe. The present study improves our understanding of the species associated with several disease symptoms on V. vinifera plants, and provides useful information for effective disease management.

High-cell-density cultivation of yeasts on disaccharides in oxygen-limited batch cultures
Castrillo, J.I.C. ; Kaliterna, J. ; Weusthuis, R.A. ; Dijken, J.P. van; Pronk, J.T. - \ 1996
Biotechnology and Bioengineering 49 (1996). - ISSN 0006-3592 - p. 621 - 628.
Coordination of sucrose uptake and respiration in the yeast Debaryomyces yamadae
Kaliterna, J. ; Weusthuis, R.A. ; Castrillo, J.I. ; Dijken, J.P. van; Pronk, J.T. - \ 1995
Microbiology 141 (1995)7. - ISSN 1350-0872 - p. 1567 - 1574.
Screening in batch cultures identified Debaryomyces yamadae as a yeast that exhibits the Kluyver effect for sucrose: this disaccharide can be respired but, even under oxygen-limited conditions, alcoholic fermentation of sucrose does not occur. Ethanol, glycerol and arabitol were the main fermentation products during oxygen-limited growth on glucose in chemostat cultures. None of these fermentation products were produced in oxygen-limited chemostat cultures grown on sucrose and the fraction of the sucrose that could not be respired remained unused in the culture medium. This absence of alcoholic fermentation was not due to repression of the key fermentative enzymes pyruvate decarboxylase and alcohol dehydrogenase. In contrast to some other yeasts that exhibit a Kluyver effect, D. yamadae did not exhibit a preference for ethanol in batch cultures grown on mixtures of ethanol and sucrose. Sucrose metabolism in D. yamadae involves intracellular hydrolysis by an α-glucosidase. Incubation of weakly buffered cell suspensions with sucrose led to a rapid transient alkalinization, indicating the presence of a sucrose-proton symport system. The apparent substrate saturation constant of the sucrose-uptake system was 0.2 mmol l-1. Sucrose-dependent alkalinization rates were much lower in samples from oxygen-limited cultures than in samples from aerobic cultures. Transient responses of D. yamadae to oxygen limitation were investigated by applying a sudden decrease in the oxygen feed to aerobic sugar-limited chemostat cultures. In glucose grown cultures, this led to alcoholic fermentation and no significant accumulation of sugar occurred after the switch. In sucrose-limited cultures, sugar accumulation occurred instantaneously after the switch, and ethanol formation was virtually absent. The results indicate that the Kluyver effect for sucrose in D. yamadae, i.e. the adjustment of the glycolytic flux to the cells' respiratory capacity, is effected by rapid down-regulation of the capacity of the sucrose carrier under oxygen-limited conditions.
Transient responses of Candida utilis to oxygen-limitation Regulation of the Kluyver effect for maltose
Kaliterna, J. ; Weusthuis, R.A. ; Castrillo, J.I. ; Dijken, J.P. van; Pronk, J.T. - \ 1995
Yeast 11 (1995)4. - ISSN 0749-503X - p. 317 - 325.
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