TY  - PRO
AU  - Cunfer,B.M.
AU  - Ginkel,M.van|McNab,A.|Krupinsky,J.
ED  - Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico)
TI  - Stagonospora and septoria pathogens of cereals:  The infection process
SN  - 970-648-035-8
U1  - 632.4 
PY  - 1999///
CY  - Mexico, DF (Mexico)
PB  - CIMMYT
KW  - Infection
KW  - Pathogens
KW  - Plant diseases
KW  - AGROVOC
KW  - Septoria
KW  - Stagonospora
KW  - CIMMYT
N2  - Definitive information on the infection process has been reported for Stagonospora nodorum, Septoria tritici, and Septoria passerinii. Like other necrotrophic pathogens, they do not elicit the hypersensitive reaction. A significant difference in the infection process between Septoria and Stagonospora pathogens is that spore germination and penetration proceed much faster for S. nodorum than for S. tritici and S. passerinii. The Septoria pathogens penetrate the leaf primarily through stomata, whereas S. nodorum penetrates both directly and through stomata. Stagonospora nodorum kills the epidermal cells quickly, but S. tritici and S. passerinii do not kill epidermal cells until hyphae have ramified through the leaf mesophyll and rapid necrosis begins. Resistance slows host colonization but has no appreciable effect on the process of lesion development. The mechanisms controlling host response are still unclear. The infection process for ascospores is probably very similar to that for pycnidiospores. Ascospores of Phaeosphaeria nodorum germinate over a wide range of temperatures and their germ tubes penetrate the leaf directly. However, unlike pycnidiospores, the ascospores do not germinate in free water
ER  -