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Ecology, 91(4), 2010, pp. 10751082 2010 by the Ecological Society of America
 

Summary: Ecology, 91(4), 2010, pp. 10751082
2010 by the Ecological Society of America
Salicylate-mediated interactions between pathogens and herbivores
JENNIFER S. THALER,1,2,3
ANURAG A. AGRAWAL,1,2
AND RAYKO HALITSCHKE
2
1
Department of Entomology, 4138 Comstock Hall, Cornell University, Ithaca, New York 14853 USA
2
Department of Ecology and Evolutionary Biology, 4138 Comstock Hall, Cornell University, Ithaca, New York 14853 USA
Abstract. Plants employ hormone-mediated signaling pathways to defend against
pathogens and insects. We tested predictions about the relative effect of jasmonate and
salicylate pathways and how they mediate interactions between pathogens and herbivores. We
employed two pathogens of tomato, Pseudomonas syringae (Pst) and tobacco mosaic virus
(TMV), that are known to elicit distinct components of the two pathways, and we address the
consequences of their induction for resistance in wild-type and salicylate-deficient transgenic
plants in field experiments. We report that Pst infection induced jasmonic acid and proteinase
inhibitors (PIs), and reduced the growth of Spodoptera exigua caterpillars on wild-type and
salicylate-deficient plants. Pst and TMV both induced salicylic acid in wild-type but not

  

Source: Agrawal, Anurag - Department of Ecology and Evolutionary Biology & Entomollogy, Cornell University

 

Collections: Environmental Sciences and Ecology