The wound response in tomato--role of jasmonic acid.
Plants respond to mechanical wounding or herbivore attack with a complex scenario of sequential, antagonistic or synergistic action of different signals leading to defense gene expression. Tomato plants were used as a model system since the peptide systemin and the lipid-derived jasmonic acid (JA) were recognized as essential signals in wound-induced gene expression. In this review recent data are discussed with emphasis on wound-signaling in tomato. The following aspects are covered: (i) systemin signaling, (ii) JA biosynthesis and action, (iii) orchestration of various signals such as JA, H2O2, NO, and salicylate, (iv) local and systemic response, and (v) amplification in wound signaling. The common occurrence of JA biosynthesis and systemin generation in the vascular bundles suggest JA as the systemic signal. Grafting experiments with JA-deficient, JA-insensitive and systemin-insensitive mutants strongly support this assumption.
Wasternack
Claus
C
Department of Natural Product Biotechnology, Leibniz-Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle/Saale, Germany. cwastern@ipb-halle.de
Stenzel
Irene
I
Hause
Bettina
B
Hause
Gerd
G
Kutter
Claudia
C
Maucher
Helmut
H
Neumerkel
Jana
J
Feussner
Ivo
I
Miersch
Otto
O
D003517:Cyclopentanes / Q000378:metabolism*; D006861:Hydrogen Peroxide / Q000378:metabolism; D007113:Immunity, Innate; D018551:Solanum lycopersicum / Q000166:cytology / Q000254:growth & development / Q000378:metabolism*; D008954:Models, Biological; D009569:Nitric Oxide / Q000378:metabolism; D054883:Oxylipins; D010455:Peptides / Q000378:metabolism; D012459:Salicylates / Q000378:metabolism; D015398:Signal Transduction
D003517:Cyclopentanes; D054883:Oxylipins; D010455:Peptides; D012459:Salicylates; D009569:Nitric Oxide; C073704:systemin; C011006:jasmonic acid; D006861:Hydrogen Peroxide