Fusarium


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Fusarium

[fyü′za·rē·əm]
(mycology)
A genus of fungi in the family Tuberculariaceae having sickle-shaped, multicelled conidia; includes many important plant pathogens.

Fusarium

 

a genus of fungi of the class Fungi Imperfecti. It includes nine sections, 26 species, and 29 races. The fungi reproduce asexually by means of conidia, which vary in form, size, structure, and method of formation. The oval or ovate microconidia are one-or two-celled and form both on conidiophores and directly on the short ramuli of the mycelium. The macroconidia, which are four-to seven-celled, are falciform or fusiform-falciform. They form on branched conidiophores that are frequently gathered into distinctive pulvini—bright orange, violet, or pink sporodochia. Fusaria are also capable of forming chlamydospores during a period of intensive mycelial growth. Several species bear their spores in perithecia.

Most species are saprophytes that live in the soil on plant residues. There are many parasitic species that cause harmful plant diseases called fusarium wilts. Some species secrete toxic substances that are harmful to plants. The use of rye, wheat, barley, oats, and other plants contaminated by fusarial toxins leads to the development of alimentary-toxic aleukia in humans and fusariotoxicosis in animals. When proliferating, the mycelium of Fusarium aguaeductum, which is waterborne, can clog water pipes.

M. A. LITVINOV

References in periodicals archive ?
gladioli y el aislado de Fusarium de Villa Guerrero se presentan en otro grupo, lo que hace suponer que estos comparten caracteristicas moleculares que representan un alto porcentaje de similitud entre ellas (Figura 3).
The isolates were grown using minimum cultivation technique, in which mycelial fragments of the isolates were placed on a disk of Malt Extract 2% over a microscope slide, containing sterilized soil and sand at 1:1 and covered with cover glass, promoting an environment favorable for development and sporulation of Fusarium sp.
mucronata where revealed by 100% and 94% similarity as Fusarium penzigii and Fusarium dimerum respectively.
Fusarium related diseases include citrus decline, vascular wilts, crown rot and root rot, head blight on cereal grain and Bakanae disease on rice (Safdar et al.
The market for Fusarium toxin, among all types of mycotoxins, accounted for the largest share in 2015.
plants and its possible impact on Fusarium oxysporum f.
Based on microscopic examinations, genus level identifications revealed that from the total of 52 diseased root samples considered in this study, 26 samples were identified as Neocosmospora, 25 as Fusarium and 1 as Syncephalastrum.
Host range of fusarium dieback and its ambrosia beetle (Coleoptera: Scolytinae) vector in southern California.
The five fungal strains Aspergillus niger, Aspergillus flavus, Aspergillus terreus, Aspergillus fumigatus and Fusarium sp.
Emerita Albas, park supervisor, said officials had investigated the incursions and had talked to the settlers, mostly from adjacent communities, who lost root crops to Fusarium wilt, a fungal disease.