Journal
PHYSIOLOGICAL AND MOLECULAR PLANT PATHOLOGY
Volume 73, Issue 4-5, Pages 67-77Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.pmpp.2009.02.001
Keywords
Alternaria alternata; Host-specific toxin; AAL-toxin; Salicylic acid; Jasmonic acid; Induced resistance; Solanum lycopersicum
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Funding
- Japanese Society for Promotion of Sciences
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A necrotrophic pathogen, the tomato pathotype of Alternaria alternata (Aa) causes Alternaria stem canker on tomato. Its pathogenicity depends on the production of host-specific AAL-toxin. Pre-inoculation with nonpathogenic Aa or pretreatment an elicitor prepared from Aa reduced disease symptoms by the pathogen. Salicylic acid (SA)- and jasmonic acid (JA)-dependent defense responses in tomato are not involved in the resistance to the pathogen induced by nonpathogenic Aa. The results suggest that an alternative and unknown signaling pathway independent of SA- and JA-signaling might modulate the induced resistance by activating the expression of the multiple defense genes. (C) 2009 Elsevier Ltd. All rights reserved.
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