Journal
CELL RESEARCH
Volume 15, Issue 3, Pages 187-192Publisher
INST BIOCHEMISTRY & CELL BIOLOGY
DOI: 10.1038/sj.cr.7290285
Keywords
plant-plant communication; tomato (Lycopersicon esculentum); tobacco (Nicotiana tabacum); cotton bollworm (Helicoverpa armigera); inducible defenses
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We compared the expression patterns of three representative genes in undamaged tomato and tobacco plants in response to exposure to either tomato or tobacco fed on by Helicoverpa armigera (cotton bollworm). When tomato and tobacco, two species of one family, were incubated in the chambers with the tomato plants damaged by the cotton bollworm, the expression of the PR1, BGL2, and PAL genes was up-regulated in leaves of both plants. However, the levels of gene expression were significantly higher in the tomato than that in the tobacco. In addition, the activities of enzymes, peroxidase, polyphenol oxidase, and lipoxygenase were found to be higher in the tomato than those in the tobacco. Similar results were obtained when the damaged plants were replaced by the tobacco.
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