Wasternack Claus, Stenzel Irene, Hause Bettina, Hause Gerd, Kutter Claudia, Maucher Helmut, Neumerkel Jana, Feussner Ivo, Miersch Otto
Department of Natural Product Biotechnology, Leibniz-Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle/Saale, Germany.
J Plant Physiol. 2006 Feb;163(3):297-306. doi: 10.1016/j.jplph.2005.10.014. Epub 2005 Dec 20.
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.
植物会通过不同信号的一系列、拮抗或协同作用的复杂情况来应对机械损伤或食草动物攻击，从而导致防御基因表达。番茄植株被用作模型系统，因为肽系统素和脂质衍生的茉莉酸（JA）被认为是伤口诱导基因表达中的关键信号。在这篇综述中，我们讨论了近期的数据，重点是番茄中的伤口信号传导。涵盖了以下几个方面：（i）系统素信号传导，（ii）JA生物合成与作用，（iii）各种信号（如JA、H2O2、NO和水杨酸酯）的协调，（iv）局部和系统反应，以及（v）伤口信号传导中的放大作用。JA生物合成和系统素生成在维管束中的普遍存在表明JA是系统信号。用JA缺陷型、JA不敏感型和系统素不敏感型突变体进行的嫁接实验有力地支持了这一假设。
