入侵植物红花酢浆草对3种杂草的化感作用

Guangdong Agricultural Sciences(2014)

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Abstract
化感作用在生物入侵过程中扮演着重要的角色.以红花酢浆草(Oxalis corymbosa DC)为供体植物,以黑麦草(Lolium perenne L.)、三叶鬼针草(Bidens pilosaL.)和青葙(Celosia argentea L.)为受体,采用培养皿滤纸法测定了红花酢浆草的根、茎和叶的水提液对受体植物幼苗根长、苗高和鲜重的化感作用.结果表明,红花酢浆草根、茎和叶的提取液对3种受体植物种子萌发和幼苗生长均有化感作用,不同浓度(0.05、0.10、0.20 g/mL)的水提液对黑麦草、三叶鬼针草和青葙的化感作用强度存在差异,且随着浓度的增大,抑制作用逐渐增强.
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weeds,plant
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