@article {728, title = {An early record of Meloidogyne fallax from Ireland}, journal = {ZookeysZookeys}, volume = {643}, year = {2017}, note = {Topalovic, Olivera Moore, John F. Janssen, Toon Bert, Wim Karssen, Gerrit}, pages = {33-52}, abstract = {Root-knot nematodes, Meloidogyne spp., cause huge economic losses worldwide. Currently, three Meloidogyne spp. are present on the quarantine A2 list of EPPO, M. chitwoodi, M. fallax and M. enterolobii. As a quarantine organism, M. fallax has been detected in England and Northern Ireland on sport turf in 2011, and in England on leek in 2013. However, its presence in Ireland has probably been overlooked since 1965, when Mr. John F. Moore and Dr. Mary T. Franklin had detected a new Meloidogyne species for that time. While the relevant data was recorded and a preliminary manuscript describing the species was prepared but never submitted for publication, and together with the original slides, pictures and drawings, it was restudied recently. We compared the population of Irish Meloidogyne sp. to other similar Meloidogyne spp. Careful observation and comparison shows that it belongs to M. fallax. The characters found to be common for Irish Meloidogyne sp. and M. fallax are female stylet length (14.6 mu m) with oval to rounded basal knobs, oval shaped perineal pattern with moderately high dorsal arch, slender stylet in males (18.5 mu m) with set off and rounded basal knobs, slightly set off male head with one post-labial annule and incomplete transverse incisures, and second-stage juveniles with large and rounded stylet basal knobs, and a gradually tapering tail (46.9 mu m) with a broadly rounded tip and a clearly delimitated smooth hyaline part sometimes marked by constrictions (12.9 mu m). The host test and gall formation also correspond to M. fallax. The identification could not be additionally supported by molecular analysis, as we were unable to extract DNA from the old permanent slides. Nevertheless, our study reveals that the Meloidogyne species detected in Ireland in 1965 belongs to M. fallax.}, isbn = {1313-2989}, author = {Topalovi{\'c}, O. and Moore, J. F. and Janssen, T. and Bert, W. and Karssen, G.} } @article {715, title = {Integrative taxonomy of root-knot nematodes reveals multiple independent origins of mitotic parthenogenesis}, journal = {PloS ONEPloS ONE}, volume = {http://dx.doi.org/10.1371/journal.pone.0172190}, year = {2017}, author = {Janssen, T. and Karssen, G. and Topalovi{\'c}, O. and Coyne, D. and Bert, W.} } @article {716, title = {Mitochondrial coding genome analysis of tropical root-knot nematodes (Meloidogyne) supports haplotype based diagnostics and reveals evidence of recent reticulate evolution}, journal = {Scientific ReportsScientific Reports}, volume = {doi: 10.1038/srep22591}, year = {2016}, author = {Janssen, T. and Karssen, G. and Verhaeven, M. and Coyne, D. and Bert, W.} } @article {717, title = {First Report of Meloidogyne enterolobii causing tuber galling damage on white yam (Dioscorea rotundata) in Nigeria}, journal = {Plant DiseasePlant Disease}, year = {2016}, author = {Kolombia, Y. A. and Lava Kumar, P. and Claudius-Cole, A. O. and Karssen, G. and Viaene, N. and Coyne, D. and Bert, W.} } @article {410, title = {Deceptive morphological variation in Hirschmanniella mucronata (Nematoda: Pratylenchidae) and a polytomous key to the genus}, journal = {NematologyNematology}, number = {17}, year = {2015}, pages = {377-400}, author = {Khun, K. and Decraemer, W. and Couvreur, M. and Karssen, G. and Steel, H. and Bert, W.} } @article {201, title = {The cellular structure of the female reproductive system within the Heteroderinae and Meloidogyninae (Nematoda)}, journal = {NematologyNematology}, volume = {4}, year = {2002}, note = {Times Cited: 4 Article English Bert, W State Univ Ghent, Dept Biol, Ledeganckstr 35, B-9000 Ghent, Belgium Cited References Count: 40 651JE BRILL ACADEMIC PUBLISHERS PLANTIJNSTRAAT 2, P O BOX 9000, 2300 PA LEIDEN, NETHERLANDS LEIDEN Part 8}, pages = {953-963}, abstract = {Gonads from living young females, representing 23 different species, were extracted to study the cellular structure of the female genital structure within the Meloidogyninae and Heteroderinae. All genera studied can be characterised by their cellular spermatheca morphology. Within Meloidogyne a spherical spermatheca is found with lobe-like protruding cells, most species having 16 to 18 spermatheca cells with interlaced cell boundaries while M. microtyla and M. ichinohei have more spermatheca cells with different cell boundaries. Heterodera and Globodera reveal a comparable gonad structure. The spermatheca cells of Heterodera are columnar and arranged in a restricted number of rows, whereas in Globodera the spermatheca cells are squarish to rounded, depending on the species. The gonad morphology of Afenestrata koreana is clearly different from what would be expected based on the related genera Globodera and Heterodera. The apparently simplest genital system was found in Meloidodera floridensis where the uterus has a limited number of cells. In the other genera studied a large and variable cell-number was found}, keywords = {Afenestrata, CELLS, CLASSIFICATION, CYST, DNA, Evolution, female genital system, GENITAL SYSTEM, Globodera, GLOBODERA-ROSTOCHIENSIS, gonad, HETERODERA, HETERODERINAE, Meloidodera, MELOIDOGYNE, morphology, Nematoda, REPRODUCTIVE-SYSTEM, SEM, SPERMATHECA, TYLENCHIDA, variable cell number}, isbn = {1388-5545}, author = {Bert, W. and Karssen, G. and Van Driessche, R. and Geraert, E.} } @inbook {85, title = {Phylogeny and evolution of nematodes}, booktitle = {COST Action 872 Exploiting genomics to understand plant-nematode interactions}, volume = {557}, year = {2011}, pages = {45-59}, publisher = {Springer}, organization = {Springer}, address = {Dordrecht}, author = {Bert, W. and Karssen, G. and Helder, J.}, editor = {Jones, J. and Gheysen, G. and Fenoll, C.} } @article {73, title = {Diversity and incidence of plant-parasitic nematodes in Belgian turf grass}, journal = {NematologyNematology}, volume = {13}, year = {2011}, note = {Vandenbossche, Bart Viaene, Nicole de Sutter, Nancy Maes, Martine Karssen, Gerrit Bert, WimPart 2}, pages = {245-256}, abstract = {Eleven golf courses and eight football pitches, located in Belgium, were surveyed for plant-parasitic nematodes. This revealed a remarkably high diversity: 52 different species/taxa were identified morphologically, belonging to 23 genera and nine families. Among the most prevalent nematodes on both sports field types were Helicotylenchus pseudorobustus and Meloidogyne naasi (> 85\% and > 45\% of the analysed samples, respectively). Golf greens contained a higher density and diversity of cyst nematodes than football fields. Cyst nematode species included Punctodera punctata, Heterodera mani, H. ustinovi, H. bifenestra and H. hordecalis. Multivariate statistics of the first three species showed that they could be separated based on morphometrical characters of juveniles, but not on values based on the vulva! pattern. Several detected species, e.g., Meloidogyne minor, are a potential source of infestation of agricultural fields. This study shows the importance of plant-parasitic nematodes in turf grass in temperate Europe. In addition, a comparison between two extraction methods revealed that significantly more nematodes were extracted with the zonal centrifuge than after 2 weeks extraction with the Baermann method, except for juveniles of Meloidogyne spp. and cyst-forming species.}, isbn = {1388-5545}, author = {Vandenbossche, B. and Viaene, N. and de Sutter, N. and Maes, M. and Karssen, G. and Bert, W.} } @article {21, title = {Deceptive morphological variation in Hirschmanniella mucronata (Nematoda: Pratylenchidae) and a polytomous key to the genus}, journal = {Nematology, in pressNematology, in press}, year = {2015}, author = {Khun, K. and Decraemer. W. and Couvreur, M. and Karssen, G. and Steel, H. and Bert, W.} }