plant immunity to insect herbivores：植物对植食性昆虫的免疫.pdf

ANRV342-PP59-03 ARI 26 March 2008 15:20 Plant Immunity to Insect Herbivores Gregg A. Howe 1and Jander 2 Department of Energy-Plant Research Laboratory and Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan 48824; email: ******@ Boyce Thompson Institute for Plant Research, Cornell University, Ithaca, New York 14853; email: ******@ Annu. Rev. Plant Biol. 2008. 59:41–66 The Annual Review of Plant Biology is online at plant. This article’s doi: . Copyright c ? 2008 by Annual Reviews. All rights reserved 1543-5008/08/0602-0041$ Key Words plant-insect interaction, plant defense, jasmonate, COI1, secondary metabolism Abstract Herbivorous insects use diverse feeding strategies to obtain nutrients from their host plants. Rather than acting as passive victims in these interactions, plants respond to herbivory with the production of toxins and defensive proteins that target physiological processes in the insect. Herbivore-challenged plants also emit volatiles that at- tract insect predators and bolster resistance to future threats. This highly dynamic form of immunity is initiated by the recognition of insect oral secretions and signals from injured plant cells. These initial cues are transmitted within the plant by signal transduction pathways that include calcium ion ?uxes, phosphorylation cascades, and, in particular, the jasmonate pathway, which plays a central and conserved role in promoting resistance to a broad spectrum of in- sects. Adetailed understanding of plant immunity to arthropod her- bivores will provide new insights into basic mechanisms of munication and plant-animal coevolution and mayalso facilitate new approaches to crop protection and improvement. 41 Supplemental Videos Annu. Rev. Plant Biol. :41-66. Downloaded from arjournals. by Universidad de Talca on 12/11/08. For personal use only. ANRV342-PP59-03 ARI 26 March 2008 15:20 Secondary metab