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| 小麦幼苗及其次生代谢产物丁布对杂草的异株克生活性 | |
| 引用本文： | 赵媛,郑永权,董丰收,姚建仁,Karl Hurle.小麦幼苗及其次生代谢产物丁布对杂草的异株克生活性[J].植物保护,2005,31(3):23-26. |
| 作者姓名： | 赵媛 郑永权 董丰收 姚建仁 Karl Hurle |
| 作者单位： | 1. 中国农业科学院植物保护研究所,农业部农药化学与应用技术重点开放实验室,北京,100094;西北农林科技大学植物保护学院,陕西,杨凌,712100 2. 中国农业科学院植物保护研究所,农业部农药化学与应用技术重点开放实验室,北京,100094 3. University of Hohenhmei,Stuttgart 70599,Germany |
| 基金项目： | 国家重点基础研究发展计划(973计划) |
| 摘 要： | 研究了小麦活体、小麦水提液及小麦次生代谢产物丁布对几种杂草的异株克生活性。小麦与马唐、反枝苋、野燕麦、早熟禾、稗草等杂草混播的盆栽试验呈现出小麦播种密度越大,杂草种子萌发率越低的趋势。小麦水提液对马唐、反枝苋、早熟禾、稗草、野燕麦根和茎的生长均有明显的异株克生作用,IC50(根)<1.5 mg/mL,IC50(茎)<3.0 mg/mL,而对黑麦草、圆叶牵牛无明显的抑制活性。除马唐外,小麦水提液对供试杂草种子萌发抑制效果不明显。小麦次生代谢产物丁布对3种不同杂草的根、茎总体抑制效果为反枝苋>马唐>野燕麦,IC50(根、茎)<1.5mg/mL,IC50(种子萌发)<3.5 mg/mL。比较IC50可知,生物活性:丁布>小麦水提液。丁布是小麦中具有异株克生活性的次生代谢物。 |
| 关 键 词： | 杂草防除 异株克生 小麦 杂草 次生代谢产物 生物活性 |
Allelopathic effects of extracts from wheat seedlings and its secondary metabolite DIMBOA on weeds |
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| ZHAO Yuan;;ZHENG Yong-quan;DONG Feng-shou;YAO Jian-ren;Karl Hurle.Allelopathic effects of extracts from wheat seedlings and its secondary metabolite DIMBOA on weeds[J].Plant Protection,2005,31(3):23-26. | |
| Authors: | ZHAO Yuan;;ZHENG Yong-quan;DONG Feng-shou;YAO Jian-ren;Karl Hurle |
| Institution: | 1. Institute of Plant Protection;CAAS;Beijing 100094;China; 2. College of Plant Protection;Northwest Sci-Tech University of Agriculture and Forestry;Yangling 712100;China; 3.University of Hohenhmei;Stuttgart 70599;Germany |
| Abstract: | The allelopathic effects of wheat aqueous extracts and secondary metabolite DIMBOA on several weeds were studied. The results showed that intercropped with weeds, wheat had strong allelopathic effects on Digitaria sangguinalis (L.) Scop, Amaranthus retroflexus L., Echinochloa crusgalli (L.) Beauv., Poa annua L. and Avena fatua L.. There was a negative correlation between the germination inhibition ratio of weeds and the density of wheat seedlings. Wheat aqueous extracts had a significant allelopathic effect on weed seedlings of D. sanguinalis, P. annua , A. retroflexus, E. crusgalli and A. fatua, with IC_(50)(root)<1.5 mg/ ml and IC_(50) (stem)<3.0 mg/ ml. But their inhibitory effects on Lolium multiflorum Lam. and Pharbitis purpurea (L.) Voigt were not detected. There was no significant correlation between the concentration of the aqueous extracts and the germination inhibition ratio of the weeds, except for D. sanguinalis. The general trend of the allelopathic effects of DIMBOA on different weed species was: A. retroflexus>D. sanguinalis>A. fatua, with IC_(50) (root, stem)<1.5 mg/ ml and IC_(50) (seed germination)<3.5 mg/ ml. As for bioactivity, DIMBOA>aqueous extracts in terms of IC_(50). The results showed that DIMBOA, having allelopathic effects on weed growth, was the main secondary metabolite in wheat hydroponic solution. |
| Keywords: | weed control allelopathy wheat weed secondary metabolite bioactivity |
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