Bioactive Natural Products Laboratory, Department of Horticulture and Pesticide Research Center, and Department of Botany and Plant Pathology, Michigan State University, East Lansing, Michigan 48824.
Appl Environ Microbiol. 1991 Feb;57(2):434-9. doi: 10.1128/aem.57.2.434-439.1991.
Two isoflavonoids isolated from clover roots grown under phosphate stress were characterized as formononetin (7-hydroxy,4'-methoxy isoflavone) and biochanin A (5,7-dihydroxy,4'-methoxy isoflavone). At 5 ppm, these compounds stimulated hyphal growth in vitro and root colonization of an undescribed vesicular-arbuscular mycorrhiza, a Glomus sp. (INVAM-112). The permethylated products of the two compounds were inactive. These findings suggest that the isoflavonoids studied may act as signal molecules in vesicular-arbuscular mycorrhiza symbiosis.
从受磷酸盐胁迫的三叶草根部分离出的两种异黄酮被鉴定为芒柄花素(7-羟基-4'-甲氧基异黄酮)和大豆素 A(5,7-二羟基-4'-甲氧基异黄酮)。在 5ppm 时,这些化合物在体外刺激菌丝生长,并定殖一种未描述的泡囊丛枝菌根,即 Glomus sp.(INVAM-112)。两种化合物的全甲基化产物没有活性。这些发现表明,所研究的异黄酮可能在泡囊丛枝菌根共生中作为信号分子发挥作用。