根际区他感化学物质的分离、鉴定与生物活性的研究

本文报道根际区他感化学物质对小麦、玉米等作物种子萌发及幼苗生长抑制作用的研究结果。土壤及土壤溶液样品提取物，用ＧＣ及ＧＣ－ＭＳ鉴定出各类化合物５０多种。重点研究有代表性的３种化合物：十四烯－１、苯甲醛以及未见报道的，由作者鉴定了贩他感化合物：对－叔丁基苯甲酸。结果表明，十四烯－１在浓度达２０００ｍｇ／ｌ时，对玉米、小麦、田菁、稗子的种子萌发，幼根及幼芽生长均无明显影响；苯甲醛浓度在２００ｍｇ／ｌ以

STUDY ON ISOLATION, IDENTIFICATION AND BIOACTIVITY OF ALLELOCHEMICALS IN RHIZOSPHERE

This paper described the results of effects of some allelochemical in the rhizosphere soil solution on seed germination and seedling growth of some crops and weeds. Those extracts of samples showed bioactivity were select6d for GC-MS analysis, More than 50 different chemicals were identified, Three chemicals have been studied in some details to evaluated their aLlelopathic effect on the germination, root and seeding groWth of wheat, maize, barnyard brass and sesban. It was not found up to now that published 4-tert-butylbenzoic acid showed allelop4thic activity. At concentration of 50 mg/l, allochemicals inhibited all seeds, and the inhibitlug effects increased with concentration. The germination rate of wheat and maize seeds was culy 41 % and 7% of the control at concentration 50 mg/l, respectively. Benzaldehyde showed a mediate allelopathic activity. It inhibited the sprout of seeds at concentration over 200 mg/l,. tetradecent-1 was not considered as an allelochemical. It didn' t show any bioactivity for the tested seeds even though the solution concentration as high as 2000 mg/l.