Field Ben, Jordán Ferenc, Osbourn Anne
Department of Metabolic Biology, John Innes Centre, Norwich, NR4 7UH, UK.
New Phytol. 2006;172(2):193-207. doi: 10.1111/j.1469-8137.2006.01863.x.
Plant-derived natural products have important functions in ecological interactions. In some cases these compounds are deployed to sites of pathogen challenge by vesicle-mediated trafficking. Polar vesicle trafficking of natural products, proteins and other, as yet uncharacterized, cargo is emerging as a common theme in investigations of diverse disease resistance mechanisms in plants. Root-derived natural products can have marked effects on interactions between plants and soilborne organisms, for example by serving as signals for initiation of symbioses with rhizobia and mycorrhizal fungi. They may also contribute to competitiveness of invasive plant species by inhibiting the growth of neighbouring plants (allelopathy). Very little is known about the mechanisms of release of natural products from aerial plant parts or from roots, although there are likely to be commonalities in these processes. There is increasing evidence to indicate that pathogens and symbionts can manipulate plant endomembrane systems to suppress host defence responses and facilitate accommodation within plant cells. The relationship between secretory processes and plant interactions forms the focus of this review, which brings together different aspects of the deployment of defence-related natural products by plants.
植物源天然产物在生态相互作用中具有重要功能。在某些情况下，这些化合物通过囊泡介导的运输被输送到病原体攻击的部位。天然产物、蛋白质及其他尚未明确的货物的极性囊泡运输，正成为植物多种抗病机制研究中的一个共同主题。根源天然产物可对植物与土壤生物之间的相互作用产生显著影响，例如作为与根瘤菌和菌根真菌建立共生关系的信号。它们还可能通过抑制邻近植物的生长（化感作用）来增强入侵植物物种的竞争力。尽管这些过程可能存在共性，但对于天然产物从地上植物部分或根部释放的机制知之甚少。越来越多的证据表明，病原体和共生体可以操纵植物内膜系统来抑制宿主防御反应，并促进在植物细胞内的生存。分泌过程与植物相互作用之间的关系构成了本综述的重点，该综述汇集了植物防御相关天然产物部署的不同方面。
