Key Laboratory of Pesticide Chemistry and Application, Ministry of Agriculture, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, 100193, China, E. Mail: yongquan_zheng@yahoo.com.cn.
*Correspondence Author.
1Institute for the control of Agrochemicals, Ministry of Agriculture, Beijing, 100125, China.
We investigated the induction effects of DIMBOA by 6 weed species in wheat seedling in hydroponic and in pot culture. In hydroponic experiments, DIMBOA content in both root exudates and shoots of wheat seedlings were significantly increased by Digitaria sanguinalis L., Avena fatua L. and Amaranthus retroflexus L. weeds. While Poa annua L., Lolium multiflorum Lam. and Capsella bursa-pastoris L. showed less production of DIMBOA in wheat root exudates and shoots. In pot culture the biological induction of DIMBOA in wheat plants by former 3-weeds was similar to hydroponic solution, but DIMBOA content in shoots was higher in pot than in hydroponic solution. With the increase in densities of Digitaria sanguinalis L., the DIMBOA content in wheat shoot increased greatly, which implied that the difference in weed density may be useful approach to artificially the improve crops resistance.
>Amaranthus retroflexus L., Avena fatua L., Biological induction, Capsella bursa-pastoris L., Digitaria sanguinalis L., DIMBOA, hydroponic, Lolium multiflorum Lam., Poa annua L., pot culture, wheat
