National Peanut Research Laboratory, Agricultural Research Service, United States Department of Agriculture, Dawson, Georgia 39842, United States.
J Agric Food Chem. 2013 Feb 27;61(8):1850-8. doi: 10.1021/jf3054752. Epub 2013 Feb 18.
Under favorable conditions, the peanut plant demonstrates appreciable resistance to fungal invasion by producing and accumulating phytoalexins, antimicrobial stilbenoids. This mechanism for resistance is little understood, yet it is crucial for breeding and genetically modifying peanut plants to develop new cultivars with fungal resistance. The dynamics of phytoalexin production in peanut seeds and embryos challenged by selected important fungi and bacteria was investigated. Different biotic agents selectively elicited production of major peanut stilbenoids, resveratrol, arachidin-1, arachidin-3, and SB-1. Aspergillis species, compared to other biotic agents, were more potent elicitors of stilbenoids. Embryos demonstrated significantly higher production of stilbenoids compared to cotyledons and may serve as a convenient source of genetic material in isolating genes for peanut plant defense enhancement.
在有利条件下，花生植株通过产生和积累植物抗毒素（抗菌性芪类）来表现出对真菌入侵的明显抗性。这种抗性机制还不太了解，但对于培育和遗传修饰花生植株以开发具有抗真菌性的新品种至关重要。本研究调查了在选定的重要真菌和细菌的挑战下，花生种子和胚胎中植物抗毒素产生的动态。不同的生物制剂选择性地诱导产生主要的花生芪类物质，白藜芦醇、 arachidin-1、arachidin-3 和 SB-1。与其他生物制剂相比，曲霉菌属更能诱导芪类物质的产生。与子叶相比，胚胎中芪类物质的产生显著更高，并且可以作为分离增强花生植物防御基因的遗传材料的方便来源。
