Journal
EUROPEAN JOURNAL OF PLANT PATHOLOGY
Volume 135, Issue 4, Pages 761-769Publisher
SPRINGER
DOI: 10.1007/s10658-012-0116-0
Keywords
Ascochyta blight; Cell death; Hydrogen peroxide accumulation; Pea; Peroxidase activity; Protein cross-linking; Resistance
Categories
Funding
- Cabildo de La Palma- CSIC PhD grant
- Spanish JAEdoc program
- FEDER
- [AGL2008-0239]
- [AGL2011-22524]
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Ascochyta blight caused by Didymella pinodes is a serious disease of pea (Pisum sativum ssp. sativum) to which little resistance has been identified so far. Only incomplete resistance is available in pea germplasm although higher levels of resistance have been reported in related Pisum species. In this study we characterized histochemically the underlying resistance mechanisms in these wild species and in the pea cv. Radley, the pea cultivar with the highest level of resistance to D. pinodes. Resistance was characterized by a reduced success of colony establishment and lesion size. Histologically this was associated with higher frequency of epidermal cell death and protein cross-linking in infected epidermal cells but not with H2O2 accumulation and peroxidase activity.
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