Appl Environ Microbiol. 1996 Aug;62(8):2811-7. doi: 10.1128/aem.62.8.2811-2817.1996.
The zoospores of Phytophthora sojae are chemotactically attracted to the isoflavones genistein and daidzein that are released by soybean roots. In this study we have examined the response of P. sojae zoospores to a wide range of compounds having some structural similarity to genistein and daidzein, including isoflavones, flavones, chalcones, stilbenes, benzoins, benzoates, benzophenones, acetophenones, and coumarins. Of 59 compounds examined, 43 elicited some response. A comparison of the chemotactic responses elicited by the various compounds revealed a primary role for the phenolic 4(prm1)- and 7-hydroxyl groups on the isoflavone structure. A few compounds acted as repellents, notably methylated flavones with a hydrophobic B ring. The chemotactic response to many of the analogs was markedly different among different strains of P. sojae.
大豆疫霉游动孢子被大豆根系分泌的异黄酮染料木黄酮和大豆黄酮化学趋性吸引。在这项研究中，我们研究了大豆疫霉游动孢子对与染料木黄酮和大豆黄酮具有某些结构相似性的广泛化合物的反应，包括异黄酮、黄酮、查尔酮、芪、二苯甲酮、苯甲酸酯、二苯甲酮、苯乙酮和香豆素。在检查的 59 种化合物中，有 43 种引起了一些反应。对各种化合物引起的趋化反应的比较表明，异黄酮结构上的酚 4(prm1)-和 7-羟基基团起主要作用。一些化合物起排斥剂的作用，特别是具有疏水性 B 环的甲基化黄酮。许多类似物的趋化反应在不同的大豆疫霉菌株之间明显不同。
