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- Title
GENERAL ASPECTS REGARDING SEPTORIA TRITIC1 BLOTCH ON WHEAT.
- Authors
Maria, Curticiu Dana; Trifan, Daniela; Briciu, Al.C.; Balazs, Erika; Cota, Laura; Botez, C.
- Abstract
Septoria tritici blotch (STB), caused by the ascomycete Mycosphaerella graminicola (anamorph: Septoria tritici), is one of the most important diseases of wheat worldwide because of the impact on crop management and wheat production. The primary sources of inoculum in the disease cycle are airborne ascospores, rain-splashed pycnidiosphores from infected plant debris and seed-borne infections (Eyal Z, 1999). Both ascosphores and pycnidiosphores are released under conditions of high humidity, ascospore being released from mature pseudothecia throughout the year (Palmer C.L and Skinner W., 2002). Incidence of S. tritici depends on cultivar susceptibility, inoculum availability, crop management practices, and favorable environmental conditions (low temperature, high humidity, and frequent rain). Interest in this pathogen as the subject of biological research has been stimulated by the concern of growers and scientists in the major wheat production areas of the world, where disease outbreaks are capable of reducing yields by 30-40% (Eyal et al., 1987). Despite its economic importance, the molecular basis of its virulence and pathogenicity it is not completely understood (Palmer C.L and Skinner W., 2002). Host response in the wheat - M. graminicola system is quantitative and is expressed as a restriction of the pathogen's growth within the host. Necrosis and pycnidia coverage are reduced on a cultivar infected by an isolate avirulent to that cultivar and the quantity of fungal biomass produced is low. During the past years map locations for resistance genes to STB in wheat have been determined and most of them have associated molecular markers (S.B. Goodwin, 2007). These genes are distributed on I0 wheat chromosomes on the A, B and D genome. The researchers deal with genetic, cultural and chemical control measures, which is one of the major means for protecting wheat production.
- Subjects
SEPTORIA; SPHAEROPSIDACEAE; SEPTORIA passerinii; WHEAT; GRASSES; GRAIN
- Publication
Bulletin of the University of Agricultural Sciences & Veterinary Medicine Cluj-Napoca. Animal Science & Biotechnologies, 2008, Vol 65, Issue 1/2, p472
- ISSN
1843-5262
- Publication type
Article