Abstract
Scanning electron microscopy has shown thatFusarium nivale Ces. ex Sacc., the anamorph ofMonographella nivalis (Schaffnit) E. Müll., has annellate conidiogenous cells and this character together with its amphisphaeriaceous teleomorph distinguishes it from other fusaria.F. nivale and its varietymajus are assigned to a new genus,Gerlachia, asG. nivalis var.nivalis andG. nivalis var.major. For the teleomorph of the latter the new combinationMonographella nivalis var.neglecta (Krampe) W. Gams & E. Müll. is proposed. The causal agent of rice leaf scald,Rhynchosporium oryzae Hashioka & Yokogi, has the same conidiogenesis and is transferred toGerlachia asG. oryzae (Hashioka & Yokogi) W. Gams and distinguished fromG. nivalis by conidial shape and higher cardinal temperatures.
Samenvatting
Door middel van scanning elektronenmicroscopie werd aangetoond datFusarium nivale Ces. ex Sacc., de imperfecte vorm vanMonographella nivalis (Schaffnit) E. Müll., geringde conidiogene cellen bezit. Door dit kenmerk en de tot de Amphisphaeriaceae horende perfecte vorm wijkt de soort van de overigeFusarium-soorten af. Deze soort en de variëteitmajus worden in een nieuw geslacht,Gerlachia, geplaatst alsG. nivalis var.nivalis andG. nivalis var.major. Voor de perfecte vorm van deze laatste wordt de nieuwe combinatieMonographella nivalis var.neglecta (Krampe) W. Gams & E. Müll. geïntroduceerd. De verwekker van een bladschroeiziekte bij rijst,Rhynchosporium oryzae Hashioka & Yokogi, heeft dezelfde soort van conidiënvorming en wordt naarGerlachia overgebracht alsG. oryzae (Hashioka & Yokogi) W. Gams. Deze soort is te onderscheiden vanG. nivalis door de conidiënvorm en temperatuureis voor groei.
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Gams, W., Müller, E. Conidiogenesis of Fusarium nivale and Rhynchosporium oryzae and its taxonomic implications. Netherlands Journal of Plant Pathology 86, 45–53 (1980). https://doi.org/10.1007/BF02650394
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DOI: https://doi.org/10.1007/BF02650394