title: Verticillium longisporum, the invisible threat to oilseed rape and other brassicaceous plant hosts.
abstract: The causal agents of Verticillium wilts are globally distributed pathogens that cause significant crop losses every year. Most Verticillium wilts are caused by V. dahliae, which is pathogenic on a broad range of plant hosts, whereas other pathogenic Verticillium species have more restricted host ranges. In contrast, V. longisporum appears to prefer brassicaceous plants and poses an increasing problem to oilseed rape production.
  
  
  
  Kingdom Fungi; Phylum Ascomycota; Class Sordariomycetes; Subclass Hypocreomycetida; Family Plectosphaerellaceae; genus Verticillium.
  
  
  
  Dark unilateral stripes appear on the stems of apparently healthy looking oilseed rape plants at the end of the growing season. Microsclerotia are subsequently formed in the stem cortex beneath the epidermis.
  
  
  
  Verticillium longisporum is the only non-haploid species in the Verticillium genus, as it is an amphidiploid hybrid that carries almost twice as much genetic material as the other Verticillium species as a result of interspecific hybridization.
  
  
  
  There is no effective fungicide treatment to control Verticillium diseases, and resistance breeding is the preferred strategy for disease management. However, only a few Verticillium wilt resistance genes have been identified, and monogenic resistance against V. longisporum has not yet been found. Quantitative resistance exists mainly in the Brassica C-genome of parental cabbage lines and may be introgressed in oilseed rape breeding lines.
  
  
  
  Oilseed rape colonized by V. longisporum does not develop wilting symptoms, and therefore the common name of Verticillium wilt is unsuitable for this crop. Therefore, we propose 'Verticillium stem striping' as the common name for Verticillium infections of oilseed rape.
authors.affiliation: Laboratory of Phytopathology, Wageningen University, Droevendaalsesteeg 1, 6708, PB, Wageningen, the Netherlands.|Department of Crops and Agronomy, National Institute of Agricultural Botany, Huntingdon Road, Cambridge, CB3 0LE, UK.
authors.forename: Jasper R L
authors.initials: JR
authors.lastname: Depotter
authors.affiliation: Laboratory of Phytopathology, Faculty of Bioscience Engineering, Coupure links 653, Ghent University, B-9000, Ghent, Belgium.
authors.forename: Silke
authors.initials: S
authors.lastname: Deketelaere
authors.affiliation: Department of Plant Pathology, University of California Davis, One Shields Avenue, Davis, CA, 95616, USA.
authors.forename: Patrik
authors.initials: P
authors.lastname: Inderbitzin
authors.affiliation: Department of Crop Sciences, Plant Pathology and Crop Protection Division, Georg-August University Göttingen, Grisebachstrasse 6, 37077, Göttingen, Germany.
authors.forename: Andreas Von
authors.initials: AV
authors.lastname: Tiedemann
authors.affiliation: Laboratory of Phytopathology, Faculty of Bioscience Engineering, Coupure links 653, Ghent University, B-9000, Ghent, Belgium.
authors.forename: Monica
authors.initials: M
authors.lastname: Höfte
authors.affiliation: Department of Plant Pathology, University of California Davis, One Shields Avenue, Davis, CA, 95616, USA.
authors.forename: Krishna V
authors.initials: KV
authors.lastname: Subbarao
authors.affiliation: Department of Crops and Agronomy, National Institute of Agricultural Botany, Huntingdon Road, Cambridge, CB3 0LE, UK.
authors.forename: Thomas A
authors.initials: TA
authors.lastname: Wood
authors.affiliation: Laboratory of Phytopathology, Wageningen University, Droevendaalsesteeg 1, 6708, PB, Wageningen, the Netherlands.
authors.forename: Bart P H J
authors.initials: BP
authors.lastname: Thomma
mesh_terms: D005075:Biological Evolution; D029688:Brassica napus / Q000382:microbiology*; D018556:Crops, Agricultural / Q000382:microbiology; D054884:Host-Pathogen Interactions; D010935:Plant Diseases / Q000382:microbiology; D020172:Verticillium / Q000145:classification / Q000235:genetics / Q000472:pathogenicity / Q000502:physiology*
keywords: Arabidopsis; Brassica; amphidiploid; disease management; host range; pathogenicity; vascular wilt