Absorption and Elimination of the Allelochemical MBOA by Weeds during Seedling Growth

6-Methoxy-2-benzoxazolinone (MBOA) is an allelochemical that found in Poaceae and generally associated with monocotyledon species. This compound formed from the glycosylated form of 2,4-dihydroxy-(2H)-1,4-benzoxazin-3(4H)-one (Gly-DIMBOA) by a two-stage degradation process. The MBOA detoxification capacity two weed species, namely Echinochloa crus-galli Lolium rigidum, resistant biotype rigidum (SLR31) was studied both qualitatively quantitatively. product metabolism similar for finding indicates these weeds probably metabolize xenobiotics identical route, since detected same cases. Kinetic studies on absorption translocation to shoot showed differences processes depending analysis treated plants, which were subsequently transplanted growth medium without xenobiotic compound, are capable transmitting previously absorbed root exudation. results show this process another defense mechanism plants facing external threats.