蒽在黑麦草体内的代谢作用

以黑麦草(Lolium multiflorum Lam.)为供试植物,采用水培试验方法,研究了植物对蒽的代谢作用,并分析了其代谢产物.结果表明,经蒽培养液处理96h并转入无蒽培养液培养后0~16d,黑麦草体内蒽的含量由0.760mg/kg降为0.147mg/kg,减少80.6%,主要为植物所代谢;根部是代谢蒽的主要部位;蒽的一级代谢产物为蒽醌和蒽酮,0~16d,蒽酮在黑麦草体内总体上呈积累态势,而蒽醌则会被进一步代谢,蒽醌和蒽酮可以由根系向培养液中释放,也可由根向茎叶传输;黑麦草对蒽酮和蒽醌的传输系数(TF)分别为0.796~1.285和0.239~0.653,蒽酮更易在黑麦草体内传输.

Metabolism of anthracene in ryegrass (Lolium multiflorum Lam.)

Metabolism of anthracene by ryegrass(Lolium multiflorum Lam.)was studied using a greenhouse experiment.Anthraqinone and anthrone as the first-grade metabolic products of anthracene was analysed.Concentrations of anthracene in ryegrass decreased from 0.760mg/kg to 0.147mg/kg,and 80.6%of anthracene was degrdaded in 0～16d.Anthracene was proven to be metabolized by ryegrass,and root was the main position where the metabolism performed.And anthrone was found to accumulate in the plant,while anthraqinone was further metabolized in plant bodies.The release of anthraqinone and anthrone from plant root to cultivation solution was detected.Translocation of anthraqinone and anthrone from plant root to shoot was observed,and translocation factor(TF)values of anthrone and anthraqinone were 0.796～1.285 and 0.239～0.653,indicating the more easier translocation of anthrone than anthraqinone in ryegrass.