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Displaying results 1 to 2 of 2.
Halim, V. A.; Hunger, A.; Macioszek, V.; Landgraf, P.; Nürnberger, T.; Scheel, D.; Rosahl, S.; The oligopeptide elicitor Pep-13 induces salicylic acid-dependent and -independent defense reactions in potato Physiol. Mol. Plant Pathol. 64, 311-318, (2004) DOI: 10.1016/j.pmpp.2004.10.003
The Phytophthora-derived oligopeptide elicitor, Pep-13, originally identified as an inducer of plant defense in the nonhost–pathogen interaction of parsley and Phytophthora sojae, triggers defense responses in potato. In cultured potato cells, Pep-13 treatment results in an oxidative burst and activation of defense genes. Infiltration of Pep-13 into leaves of potato plants induces the accumulation of hydrogen peroxide, defense gene expression and the accumulation of jasmonic and salicylic acids. Derivatives of Pep-13 show similar elicitor activity in parsley and potato, suggesting a receptor-mediated induction of defense response in potato similar to that observed in parsley. However, unlike in parsley, infiltration of Pep-13 into leaves leads to the development of hypersensitive response-like cell death in potato. Interestingly, Pep-13-induced necrosis formation, hydrogen peroxide formation and accumulation of jasmonic acid, but not activation of a subset of defense genes, is dependent on salicylic acid, as shown by infiltration of Pep-13 into leaves of potato plants unable to accumulate salicylic acid. Thus, in a host plant of Phytophthora infestans, Pep-13 is able to elicit salicylic acid-dependent and -independent defense responses.
Landgraf, P.; Feussner, I.; Hunger, A.; Scheel, D.; Rosahl, S.; Systemic Accumulation of 12-oxo-phytodienoic Acid in SAR-induced Potato Plants Eur. J. Plant Pathol. 108, 279-283, (2002) DOI: 10.1023/A:1015132615650
In potato plants induced for systemic resistance by infiltration with Pseudomonas syringae pv. maculicola, 12-oxo-phytodienoic acid (OPDA) accumulated in infiltrated leaves as well as in non-treated leaves of infected plants. In contrast, jasmonic acid (JA) levels increased only in infiltrated leaves, suggesting that the biosynthetic precursor of JA, OPDA, might play a role in systemic acquired resistance.