Control of the Bacterial Wilt of Tomato Plants by a Derivative of 3-Indolepropionic Acid Based on Selective Actions on Ralstonia solanacearum
摘要:
3-Indolepropionic acid (IPA)-related compounds having a benzo[b]thiophene or an indazole ring and derivatives having various substituents in the propionic acid moieties were tested for their antibacterial activity against Ralstonia solanacearum. Substitution of the indole ring for other aromatic rings resulted in lowered activity, whereas addition of a methyl or a trifluoromethyl group to the propionic acid moiety had little effect. Of the derivatives, 3-(3-indolyl)butanoic acid (3-IBA) was as active as IPA, exhibiting a 10-fold higher activity with the S configuration than with the R configuration. In contrast with the strong phytotoxicity of IPA, 3-IBA was able to suppress bacterial wilt without affecting the growth of tomato plants.
3-Indolepropionic acid (IPA)-related compounds having a benzo[b]thiophene or an indazole ring and derivatives having various substituents in the propionic acid moieties were tested for their antibacterial activity against Ralstonia solanacearum. Substitution of the indole ring for other aromatic rings resulted in lowered activity, whereas addition of a methyl or a trifluoromethyl group to the propionic acid moiety had little effect. Of the derivatives, 3-(3-indolyl)butanoic acid (3-IBA) was as active as IPA, exhibiting a 10-fold higher activity with the S configuration than with the R configuration. In contrast with the strong phytotoxicity of IPA, 3-IBA was able to suppress bacterial wilt without affecting the growth of tomato plants.