caa a22 4500 467947236 CHVBK 20180405193738.0 cr unu---uuuuu 170328e20040901xx s 000 0 eng 10.1007/BF02637263 doi (NATIONALLICENCE)springer-10.1007/BF02637263 (NATIONALLICENCE)springer-10.1007/s00344-004-0030-6 Howe Gregg Department of Energy Plant Research Laboratory, Michigan State University, 48824, East Lansing, Michigan, USA aut Jasmonates as signals in the wound response [Elektronische Daten] [Gregg Howe] Plant responses to wounding and herbivore attack are orchestrated by complex signaling pathways that link the production of chemical and physical signals at the wound site to activation of gene expression and other cellular processes. The systemic nature of many wound-induced responses provides an attractive opportunity to study intercellular signaling pathways that operate over long distances within the plant. Genetic dissection of the wound-response pathway in tomato indicates that (1) systemin and its precursor protein, prosystemin, are upstream components of an intercellular signaling cascade that requires the biosynthesis and action of jasmonic acid (JA); and (2) physiological processes regulated by this pathway confer host resistance to a broad spectrum of plant invaders. Grafting experiments conducted with mutants defective in systemic wound signaling indicate that systemin functions at or near the wound site to trigger the production of JA, which in turn acts non-cell autonomously to promote systemic defense responses. The location of JA biosynthetic enzymes within the companion cell-sieve element complex of vascular bundles, together with the accumulation of JA in vascular tissues, support a role for jasmonates as phloem-mobile signals. The recent discovery of enzymes involved in the metabolism of JA to volatile methyl-JA and bioactive JA-amino acid conjugates has potential implications for the mechanism by which JA promotes wound signaling. Species-specific differences in the mechanism of wound signaling appear to reflect the way in which the wound-induced jasmonate pathway is regulated by other signals including systemin, cell wall-derived oligosaccharides, ethylene, and insect-derived elicitors. Adding to the complexity of the wound-induced jasmonate cascade are wound-signaling pathways that operate independently of JA. Springer Science+Business Media, Inc, 2004 Jasmonic acid nationallicence Systemin nationallicence Wound response nationallicence Long-distance signaling nationallicence Plant defense nationallicence Journal of Plant Growth Regulation Springer-Verlag 23/3(2004-09-01), 223-237 0721-7595 23:3<223 2004 23 344 https://doi.org/10.1007/BF02637263 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02637263 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Howe Gregg Department of Energy Plant Research Laboratory, Michigan State University, 48824, East Lansing, Michigan, USA aut NATIONALLICENCE 773 0- Journal of Plant Growth Regulation Springer-Verlag 23/3(2004-09-01), 223-237 0721-7595 23:3<223 2004 23 344 NATIONALLICENCE 856 40 https://doi.org/10.1007/s00344-004-0030-6 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Howe Gregg Department of Energy Plant Research Laboratory, and Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan 48824, USA aut NATIONALLICENCE 773 0- Journal of Plant Growth Regulation Springer-Verlag; www.springer-ny.com 23/3(2004-09-01), 223-237 0721-7595 23:3<223 2004 23 344 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE NATIONALLICENCE NL-springer