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Titolo:
Systemic expression of defense response genes in wheat spikes as a response to Fusarium graminearum infection
Autore:
Pritsch, C; Vance, CP; Bushnell, WR; Somers, DA; Hohn, TM; Muehlbauer, GJ;
Indirizzi:
Univ Minnesota, Dept Agron & Plant Genet, St Paul, MN 55108 USA Univ Minnesota St Paul MN USA 55108 & Plant Genet, St Paul, MN 55108 USA USDA ARS, Plant Sci Res Unit, St Paul, MN 55108 USA USDA ARS St Paul MN USA 55108 , Plant Sci Res Unit, St Paul, MN 55108 USA USDA ARS, Cereal Dis Lab, St Paul, MN 55108 USA USDA ARS St Paul MN USA 55108 ARS, Cereal Dis Lab, St Paul, MN 55108 USA Univ Minnesota, Dept Plant Pathol, St Paul, MN 55108 USA Univ Minnesota St Paul MN USA 55108 t Plant Pathol, St Paul, MN 55108 USA USDA ARS, Natl Ctr Agr Utilizat Res, Mycotoxin Res Unit, Peoria, IL 61604 USA USDA ARS Peoria IL USA 61604 es, Mycotoxin Res Unit, Peoria, IL 61604 USA
Titolo Testata:
PHYSIOLOGICAL AND MOLECULAR PLANT PATHOLOGY
fascicolo: 1, volume: 58, anno: 2001,
pagine: 1 - 12
SICI:
0885-5765(200101)58:1<1:SEODRG>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
F-SP HORDEI; ACQUIRED-RESISTANCE; DISEASE RESISTANCE; SALICYLIC-ACID; 2,6-DICHLOROISONICOTINIC ACID; GIBBERELLA-ZEAE; HEAD BLIGHT; ARABIDOPSIS; PLANTS; INDUCTION;
Keywords:
Triticum aestivum L.; Fusarium graminearum; Fusarium head blight; defense response genes; systemic response; beta-glucuronidase; SAR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
65
Recensione:
Indirizzi per estratti:
Indirizzo: Muehlbauer, GJ Univ Minnesota, Dept Agron & Plant Genet, St Paul, MN 55108USA Univ Minnesota St Paul MN USA 55108 St Paul, MN 55108 USA
Citazione:
C. Pritsch et al., "Systemic expression of defense response genes in wheat spikes as a response to Fusarium graminearum infection", PHYSL MOL P, 58(1), 2001, pp. 1-12

Abstract

Wheal spikes infected by Fusarium graminearum result in Fusarium head blight, a devastating disease of wheat. The spikes respond to infection by inducing a set of defense response genes in infected spikelets much as has beenshown in other plant-pathogen interactions. To determine whether defense response genes are expressed systemically within F. graminearum-inoculated wheat spikes, we examined transcript accumulation of four defense response genes (peroxidase, PR-1, PR-3 and PR-5) in colonized and uncolonized portions of wheat spikes of resistant and susceptible genotypes. We determined whether sampled regions of point-inoculated wheat spikes were colonized or notusing a Fusarium spp.-specific plate assay and an F. graminearum isolate expressing beta -glucuronidase (GUS). The GUS-expressing F. graminearum isolate proved particularly useful for visualizing and following the spread of the fungus and for measuring the amount of fungal biomass in spike tissues. We found that transcripts of the four defense response genes accumulated in both colonized and uncolonized regions of spikes of resistant and susceptible genotypes at 48 h after inoculation. These results demonstrate that direct contact with the pathogen is not required for induction of defense response genes and that these genes are activated in both susceptible and resistant genotypes. (C) 2001 Academic Press.

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Documento generato il 20/09/20 alle ore 07:33:10