Septoria tritici

From Wikipedia, the free encyclopedia

Septoria leaf blotch

Kingdom:	Fungi
Division:	Ascomycota
Family:	Mycosphaerellaceae
Genus:	Septoria
Species:	S. tritici

Binomial name

Septoria tritici
Roberge

Septoria tritici is the causal agent of S. tritici leaf blotch, a foliar disease of wheat, and occasionally infects other grasses including barley. It is found in all wheat growing areas of the world^[1] and is the major disease of wheat in the UK.^[2]

The teleomorph is Mycosphaerella graminicola (Fuckel) Schröter

1 Morphology
2 Epidemiology
3 Sources
4 References

[edit] Morphology

Asexual state: Pycnidiospores are hyaline and threadlike and measure 1.7-3.4 x 39-86 μm, with 3 to 7 indistinct septations. Germiniation of pycnidiospores can be lateral or terminal. Cirrhi are milky white to buff. Sometimes in culture nonseptate, hyaline microspores, measuring 1-1.3 x 5-9 μm, occur outside pycnidia by yeastlike budding.^[3]

Sexual state: Perithecia are subepidermal, globose, dark brown, and 68-114 μm in diameter. Asci measure 11-14 x 30-40 μm. Ascospores are hyaline, elliptical, and 2.5-4 x 9-16 μm, with two cells of unequal length.^[3]

[edit] Epidemiology

The period between infection and formation of sporulating structures (latent period) was estimated to be 20.35 ± 4.15 days for S. tritici and decreased with increasing temperature. ^[4]

[edit] Sources

van Ginkel, M.; A. McNab, J. Krupinsky (1999). Septoria and stagonospora diseases of cereals: A compilation of global research. CIMMYT, 186pp.

[edit] References

^ (1988) European handbook of Plant Diseases. Blackwell Scientific Publications.
^ ADAS. UK pest disease and weed incidence reports 1998-2005.
^ ^a ^b Wiese, M.V. (1987). Compendium of wheat diseases. American Phytopathological Society, 124.
^ Henze M, Beyer M, Klink H, Verreet J-A (2007): Characterizing meteorological scenarios favorable for Septoria tritici infections in wheat and estimation of latent periods. Plant Disease 91: 1445-1449. [1]