Ebel J
Botanisches Institut, Ludwig-Maximilians-Universität München, Germany.
Bioessays. 1998 Jul;20(7):569-76. doi: 10.1002/(SICI)1521-1878(199807)20:7<569::AID-BIES8>3.0.CO;2-F.
Plants have acquired defense mechanisms to counteract potential pathogens. One such strategy involves inducible defense reactions that are activated by elicitors, signaling compounds of diverse nature. For one class of elicitors, oligoglucosides, recent developments in the characterization and isolation of an oligoclucan-binding protein, a putative elicitor receptor, and isolation of a cDNA that encodes the binding protein are discussed. Furthermore, the discovery of a role for calcium in the elicitation process is described. Finally, the identification of polymerase chain reaction products whose sequences indicate that they encode cytochrome P-450-dependent enzymes with possible roles in the formation of phytoalexins, antimicrobial plant defense compounds, is reported. These advances may lay the foundation for the first characterization of a receptor and subsequent signaling events in oligoglucan elicitor perception by higher plants.
植物已经获得了防御机制来对抗潜在的病原体。其中一种策略涉及诱导性防御反应，这些反应由激发子（性质多样的信号化合物）激活。对于一类激发子——寡糖，本文讨论了寡聚糖结合蛋白（一种假定的激发子受体）的表征和分离以及编码该结合蛋白的cDNA的分离方面的最新进展。此外，还描述了钙在激发过程中的作用的发现。最后，报告了聚合酶链反应产物的鉴定结果，其序列表明它们编码细胞色素P-450依赖性酶，这些酶可能在植保素（抗菌植物防御化合物）的形成中发挥作用。这些进展可能为高等植物对寡糖激发子的受体首次表征及后续信号事件奠定基础。
