Title: Sharpshooter Herbivory: Targeting the Bulls-Eye Between Aphid and Caterpillar Signature Defense Responses Authors
|Cave, R - UNIV. OF FLORIDA|
Submitted to: Florida Entomological Society Annual Meeting
Publication Type: Abstract Only
Publication Acceptance Date: July 22, 2005
Publication Date: July 24, 2005
Citation: Mozoruk, J.J., Hunnicutt, L.E., Bausher, M.G., Cave, R., Hunter, W.B. 2005. Sharpshooter herbivory: targeting the bulls-eye between aphid and caterpillar signature defense responses. 88th annual meeting of the Florida Entomological Society. July 24-27, 2005. Ft. Myers, FL. Paper No. DSP-15. Technical Abstract: Using nylon filter microarrays, we analyzed the expression profile of 1731 unique genes from the vascular transcriptome of Citrus sinensis L. Osbeck challenged by herbivory from the glassy-winged sharpshooter (GWSS), Homalodisca coagulata (Say). Transcripts encoding proteins functioning in direct defense, defense signaling, ROS scavenging and abiotic stress as well as proteins with unknown function were increased. Interestingly, several of the GWSS-responsive transcripts lack a significant match to any publicly deposited protein sequence signifying their potential as novel genes involved in plant defense, wound response or abiotic stress. Contrary to studies involving sap-feeding insects, we observed weak induction of SA-regulated genes. Instead, transcript profiles suggested similarities to wounding through JA-independent pathways, perhaps driven by endogenous ethylene and a close association with dehydration stress.