作者:Hisashi Kato-Noguchi、Seiji Kosemura、Shosuke Yamamura
DOI:10.1016/s0031-9422(98)00029-6
日期:1998.6
A new benzoxazolinone, 5-chIoro-6-methoxy-2-benzoxazolinone (Cl-MBOA) caused growth inhibition of roots and shoots of oat (Avena sativa), timothy (Phleum pratense), crabgrass (Digitaria sanguinalis), ryegrass (Lolium multiflorum), cockscomb (Amaranthus Caudatus), cress (Lepidium sativum) and lettuce (Lactuca sativa); increasing the dose of Cl-MBOA increased inhibition. The concentrations for 49% inhibition of root growth were 0.12, 0.14, 0.17, 0.19, 0.46, 0.57 and 0.76 mM for timothy, crabgrass, ryegrass, oat; cockscomb, cress and lettuce, respectively, and the concentrations for 40% inhibition of shoot growth were 0.25, 0.28, 0.36, 0.40, 7.9, 12.5 and 19.6 mM for timothy, crabgrass, ryegrass, cockscomb, cress and lettuce, respectively. The contents of Cl-MBOA. in shoots and roots of 14-day-old maize (Zea mays) seedlings were 37.5 and 8.7 mu g g(-1) fr. wt. The presence of this compound in maize seedlings, coupled with its effect on growth, suggest that it may play an important role in maize allelopathy. (C) 1998 Elsevier Science Ltd. All rights reserved.