Dr. rer. nat. Susanne von Bargen

Profil

Zusammenfassung

Dr. von Bargen erforscht Pflanzenviren, insbesondere ihre genetische Struktur, Vielfalt und Ausbreitung in Wildpflanzen und Kulturpflanzen. Sie nutzt moderne Sequenzierungsmethoden, um neue Virusarten zu identifizieren und zu charakterisieren sowie die Epidemiologie von Virusausbrüchen zu verstehen. Diese Expertise ist praktisch relevant für die Diagnose von Pflanzenkrankheiten, die Vorhersage von Virusausbreitungsmustern und die Entwicklung von Bekämpfungsstrategien.

Skills

Name

Dr. rer. nat. Susanne von Bargen

Titel

Dr. rer. nat.

Fakultät

Lebenswissenschaftliche Fakultät

Institut

Albrecht Daniel Thaer-Institut für Agrar- und Gartenbauwissenschaften

Arbeitsgruppe

Phytomedizin

E-Mail

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HU-FIS-Profil

Quelle ↗

Zuletzt gescrapt

28.6.2026, 01:02:52

• Functional Genomics of Cherry Leaf Roll Virus (CLRV) and Molecular Analyses of Finnish Virus Variants

  Quelle ↗

  Förderer: DFG Sachbeihilfe Zeitraum: 11/2011 - 05/2016 Projektleitung: Dr. rer. nat. Susanne von Bargen, Prof. Dr. agr. Carmen Büttner

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• Interactions between the tomato spotted wilt virus movement protein and plant proteins showing homologies to myosin, kinesin and DnaJ-like chaperones

  2001

  Plant Physiology and Biochemistry · 81 Zitationen · DOI

• Characterisation of a novel Emaravirus identified in mosaic‐diseased Eurasian aspen (<scp><i>Populus tremula</i></scp>)

  2020

  Annals of Applied Biology · 40 Zitationen · DOI

  Abstract Since Emaraviruses have been discovered in 2007 several new species were detected in a range of host plants. Five genome segments of a novel Emaravirus from mosaic‐diseased Eurasian aspen ( Populus tremula ) have been completely determined. The monocistronic, segmented ssRNA genome of the virus shows a genome organisation typical for Emaraviruses encoding the viral RNA‐dependent RNA polymerase (RdRP, 268.2 kDa) on RNA1 (7.1 kb), a glycoprotein precursor (GPP, 73.5 kDa) on RNA2 (2.3 kb), the viral nucleocapsid protein (N, 35.6 kDa) on RNA3 (1.6 kb), and a putative movement protein (MP, 41.0 kDa) on RNA4 (1.6 kb). The fifth identified genome segment (RNA5, 1.3 kb) encodes a protein of unknown function (P28, 28.1 kDa). We discovered that it is distantly related to proteins encoded by Emaraviruses, such as P4 of European mountain ash ringspot‐associated virus. All proteins from this group contain a central hydrophobic region with a conserved secondary structure and a hydrophobic amino acid stretch, bordered by two highly conserved positions, thus clearly representing a new group of homologues of Emaraviruses. The virus identified in Eurasian aspen is closely associated with observed leaf symptoms, such as mottle, yellow blotching, variegation and chloroses along veins. All five viral RNAs were regularly detectable by RT‐PCR in mosaic‐diseased P . tremula in Norway, Finland and Sweden (Fennoscandia). Observed symptoms and testing of mosaic‐diseased Eurasian aspen by virus‐specific RT‐PCR targeting RNA3 and RNA4 confirmed a wide geographic distribution of the virus in Fennoscandia. We could demonstrate that the mosaic‐disease is graft‐transmissible and confirmed that the virus is the causal agent by detection in symptomatic, graft‐inoculated seedlings used as rootstocks as well as in the virus‐infected scions used for graft‐inoculation. Owing to these characteristics, the virus represents a novel species within the genus Emaravirus and was tentatively denominated aspen mosaic‐associated virus.

• <i>Fusarium</i>Species Colonizing Spears and Forming Mycotoxins in Field Samples of Asparagus from Germany and Poland

  2006

  Journal of Phytopathology · 34 Zitationen · DOI

  Abstract The occurrence of Fusarium spp. and associated mycotoxins in asparagus spears was evaluated in Poland in 2002 and 2003 and in Germany in 2002. Spears of two cultivars, Eposs and Gijnlim, were collected from two locations in Poland, Swidwowiec and Poznan, on sandy and sandy loam soil, respectively. Fusarium oxysporum and F. proliferatum were detected at an average incidence of 38.3% and 15.8% in the spear sections sampled, respectively. In stands of 11 (tested) cultivars of asparagus sampled in Germany on sandy soil, the same species dominated, however, they were less frequent than in Poland (26.6% and 5.6% of the spears infected with F. oxysporum and F. proliferatum , respectively). Chemical analyses revealed that fumonisin B 1 (FB 1 ) and moniliformin (MON) were present in some of the spears sampled in Poland. FB 1 was not found and MON was not assessed in spears sampled in Germany in 2002, but F. proliferatum was able to form the toxin in vitro in the range from 101.4 up to 205.8 μ g/kg maize kernel substrate. Asparagus samples in Poland contained FB 1 at up to 5.6 μ g/kg spear fresh weight. The highest MON concentration (1350 μ g/kg) was detected in cultivar Eposs in Marcelin, Poland, in 2002. MON and FB 1 were found in spears infected by both F. oxysporum and F. proliferatum , however, only the latter fungus was able to synthesize both toxins.

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