Role of salicylic acid in tomato defense against cotton bollworm, Helicoverpa armigera Hubner.
We investigated the role of the salicylic acid (SA) signaling pathway in defense responses of tomato plants to the herbivore, cotton bollworm. After exposure to the cotton bollworm, tomato leaves rapidly accumulated a high level of SA. The transcription of PR1 and BGL2 genes, the marker genes of SA pathway, was up-regulated. An enhanced endogenous SA level was accompanied by an increase in the endogenous H2O2 level as compared with controls. Spraying tomato plants with a solution containing either SA or methyl salicylic acid (Me-SA), the H2O2 level dramatically increased. These data proved that the SA pathway was involved in the tomato plant defense responses to the herbivore.
Peng
Jinying
J
Institute of Plant Physiology and Ecology, The Chinese Academy of Sciences, Graduate School of the Chinese Academy of Sciences, 300 Fenglin Road, Shanghai 200032, China.
Deng
Xiaojun
X
Huang
Jianhua
J
Jia
Shihai
S
Miao
Xuexia
X
Huang
Yongping
Y
D000818:Animals; D001483:Base Sequence; D017931:DNA Primers; D017343:Genes, Plant; D006861:Hydrogen Peroxide / Q000378:metabolism; D007113:Immunity, Innate; D007915:Lepidoptera / Q000472:pathogenicity*; D018551:Solanum lycopersicum / Q000235:genetics / Q000254:growth & development / Q000469:parasitology*; D010935:Plant Diseases / Q000469:parasitology; D020133:Reverse Transcriptase Polymerase Chain Reaction; D020156:Salicylic Acid / Q000378:metabolism*
D017931:DNA Primers; D006861:Hydrogen Peroxide; D020156:Salicylic Acid