Phytopathology. 1999 Apr;89(4):298-302. doi: 10.1094/PHYTO.1999.89.4.298.
ABSTRACT In the interaction between grapevines and Botrytis cinerea, one of the main aspects of pathogenicity is fungal ability to degrade phytoalexins synthesized by the plant in response to infection. Laccase-like stilbene oxidase activity in liquid cultures of B. cinerea has been shown to be related to the decrease of phytoalexin concentrations. Recent research and results presented in this paper determined the chemical structure of a pterostilbene metabolite produced by B. cinerea. Study of degradation of pterostilbene that has just one free hydroxy phenyl group function allowed us to determine the oxidative dimerization process undergone by grapevine phytoalexins after B. cinerea infection. The phytopathological significance of this degradation process in the B. cinerea interaction has also been discussed.
摘要 在葡萄与灰霉菌的相互作用中，致病性的一个主要方面是真菌降解植物在受到感染时合成的植物抗毒素的能力。已经表明，灰霉菌液体培养物中的漆酶样芪氧化酶活性与植物抗毒素浓度的降低有关。本文介绍的最新研究结果确定了灰霉菌产生的紫檀芪代谢物的化学结构。对仅具有一个游离羟基苯基官能团的紫檀芪进行的降解研究使我们能够确定灰霉菌感染后葡萄植物抗毒素所经历的氧化二聚化过程。本文还讨论了该降解过程在灰霉菌相互作用中的病理意义。
