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New Phytol

Title:		Molecular analysis of poplar defense against herbivory: comparison of wound- and insect elicitor-induced gene expression
Author(s):		Major IT; Constabel CP;
Address:		"Centre for Forest Biology and Department of Biology, University of Victoria, Stn CSC, PO Box 3020, Victoria, BC, V8W 3 N5, Canada"
Journal Title:		New Phytol
Year:		2006
Volume:		172
Issue:		4
Page Number:		617 - 635
DOI:		10.1111/j.1469-8137.2006.01877.x
ISSN/ISBN:		0028-646X (Print) 0028-646X (Linking)
Abstract:		"In order to characterize defense responses of hybrid poplar (Populus trichocarpax P. deltoides), we profiled leaf transcript patterns elicited by wounding and by regurgitant from forest tent caterpillar (FTC; Malacosoma disstria), a Lepidopteran defoliator of poplars. Macroarrays were used to compare transcript profiles. Both FTC-regurgitant (FTC-R) and mechanical wounding with pliers elicited expression of a variety of genes, and for these genes our analysis indicated that these treatments induced qualitatively similar responses. Similarly, a comparison of responses of directly treated and systemically induced leaves indicated extensive overlap in the sets of induced genes. FTC-R was found to contain the insect-derived elicitor volicitin. The simulated herbivory treatments resulted in the induction of genes involved in poplar defense and secondary metabolism. We also identified wound-responsive genes with roles in primary metabolism, including a putative invertase, lipase, and acyl-activating enzyme; some of these genes may have roles in defense signaling. In addition, we found three unknown genes containing a ZIM motif which may represent novel transcription factors"
Keywords:		"Animals Expressed Sequence Tags Feeding Behavior/*physiology Gene Expression Gene Expression Profiling Genes, Plant Larva/physiology Moths/*physiology Plant Leaves/*metabolism Plant Proteins/*metabolism Populus/*metabolism Trypsin Inhibitors/metabolism;"
Notes:		"MedlineMajor, Ian T Constabel, C Peter eng Comparative Study Research Support, Non-U.S. Gov't England 2006/11/14 New Phytol. 2006; 172(4):617-35. doi: 10.1111/j.1469-8137.2006.01877.x"