Search for chemoattractant of Ralstonia solanacearum in tomato root exudate

从番茄根分泌物中寻找青枯雷尔氏菌的化学诱导剂。将番茄根系分泌物分离成EtOAc可溶性Fr。吸收的和非吸收的(通过)fr。活性炭柱，并考察了它们的趋化活性。通过fr.活性最强的是活性炭柱，吸附Fr。不那么活跃。传代Fr.的趋化活性比较。和相当于fr的氨基酸混合物。制备了水稻、油菜和紫花苜蓿等非寄主植物的根分泌物，并对其趋化活性进行了测定。结果，通过了fr。番茄活性炭柱的活性高于其他植物。

Chemoattractant for Ralstonia solanacearum was searched in the root exudate of tomato. The root exudate of tomato was fractionated into EtOAc-soluble fr. and absorbed and non-absorbed (passed) fr. of activated charcoal column, and their chemoattractive activity was examined. Passed fr. of activated charcoal column showed strongest activity and absorbed fr. was less active. Comparison of chemoattractive activity between passed fr. and amino acid mixture equivalent to the fr. showed the presence of chemoattractant other than amino acids.Fractionated root exudates of non-host plant of R. solanacearum, i.e. rice, rape and alfalfa were prepared and their chemoattractive activity was examined. As a result, passed fr. of activated charcoal column of tomato showed stronger activity than those of other plants.