Wound and insect herbivory responsive genes in poplar.
Insect herbivory leads to induced resistance to subsequent infestations in plants. This is due in part to feeding-induced expression of genes that can lead to reduced palatability and/or digestibility of the plant material. We identified 57 distinct differentially expressed genes from poplars that were either infested by gypsy moth (Lymantria dispar) or mechanically wounded. Eleven highly insect-inducible genes were also found to be wound-inducible. Time course analysis revealed diverse timing of peak transcript accumulation. Sequence analysis of promoters suggested that the wound responsive elements, W and DRE, and the jasmonic acid responsive H motif, are over-represented in wound-induced poplar promoters and should be investigated further.
Lawrence
Susan D
SD
U.S. Department of Agriculture, Agricultural Research Service, Insect Biocontrol Laboratory, Bldg. 011A, Rm. 214, Beltsville, MD 20705, USA. lawrencs@ba.ars.usda.gov
Dervinis
Christopher
C
Novak
Nicole
N
Davis
John M
JM
D000818:Animals; D003517:Cyclopentanes / Q000378:metabolism; D018744:DNA, Plant / Q000032:analysis*; D018506:Gene Expression Regulation, Plant; D017343:Genes, Plant; D009036:Moths; D020411:Oligonucleotide Array Sequence Analysis; D054883:Oxylipins; D010935:Plant Diseases / Q000235:genetics; D032107:Populus / Q000235:genetics*; D011401:Promoter Regions, Genetic
D003517:Cyclopentanes; D018744:DNA, Plant; D054883:Oxylipins; C011006:jasmonic acid