J
Johannes Helder
Researcher at Wageningen University and Research Centre
Publications - 119
Citations - 8066
Johannes Helder is an academic researcher from Wageningen University and Research Centre. The author has contributed to research in topics: Potato cyst nematode & Globodera rostochiensis. The author has an hindex of 38, co-authored 112 publications receiving 7045 citations.
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Top 10 plant-parasitic nematodes in molecular plant pathology
John T. Jones,Annelies Haegeman,Etienne Danchin,H. S. Gaur,Johannes Helder,Michael G. K. Jones,Taisei Kikuchi,Rosa H. Manzanilla-López,Juan E. Palomares-Rius,Wim Wesemael,Roland N. Perry,Roland N. Perry +11 more
TL;DR: The aim of this review was to undertake a survey of researchers working with plant-parasitic nematodes in order to determine a 'top 10' list of these pathogens based on scientific and economic importance.
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Phylum-Wide Analysis of SSU rDNA Reveals Deep Phylogenetic Relationships among Nematodes and Accelerated Evolution toward Crown Clades
Martijn Holterman,Andre van der Wurff,Sven van den Elsen,Hanny van Megen,Tom Bongers,Oleksandr Holovachov,Jaap Bakker,Johannes Helder +7 more
TL;DR: The exclusive common presence of fungivorous and plant parasitic nematodes supports a long-standing hypothesis that states that plant parasitic Nematodes arose from fungivory ancestors.
Top 10 plant parasitic nematodes in molecular plant pathology in (Abstracts from the 6th International Congress of Nematology, Cape Town, South Africa, 4-9 May 2014)
John T. Jones,Annelies Haegeman,Etienne Danchin,H. S. Gaur,Johannes Helder,Michael G. K. Jones,T. Kikuchi,Rosa H. Manzanilla-López,Juan E. Palomares-Rius,Wim Wesemael,Roland N. Perry +10 more
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A phylogenetic tree of nematodes based on about 1200 full-length small subunit ribosomal DNA sequences.
Hanny van Megen,Sven van den Elsen,Martijn Holterman,Gerrit Karssen,Paul Mooyman,Tom Bongers,Oleksandr Holovachov,Jaap Bakker,Johannes Helder +8 more
TL;DR: The extensiveness of convergent evolution is one of the most striking phenomena observed in the phylogenetic tree presented here – it is hard to find a morphological, ecological or biological characteristic that has not arisen at least twice during nematode evolution.
Journal ArticleDOI
Endogenous cellulases in animals: Isolation of β-1,4-endoglucanase genes from two species of plant-parasitic cyst nematodes
Geert Smant,J.P.W.G. Stokkermans,Yitang Yan,J.M. de Boer,Thomas J. Baum,Xiaohong Wang,Richard S. Hussey,Fred J. Gommers,Bernard Henrissat,Eric L. Davis,Johannes Helder,Arjen Schots,J. Bakker +12 more
TL;DR: The synthesis of EGases in the esophageal glands of the cyst nematodes Globodera rostochiensis and Heterodera glycines is reported on and it is revealed that the four catalytic domains belong to family 5 of the glycosyl hydrolases.