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首页> 外文期刊>Research on Crops >Allelopathic potential of the weed Fimbristylis dichotoma (L.) four dicotyledonous and four monocotyledonous test plantspecies
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Allelopathic potential of the weed Fimbristylis dichotoma (L.) four dicotyledonous and four monocotyledonous test plantspecies

机译：杂草Fimbristylis dichotoma（L.）四个双子叶植物和四个单子叶植物的化感潜力

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摘要

Weed plants having strong allelopathic potential provide themselves with a competitive advantage in crop fields through the release of allelochemicals. Fimbristylis dichotoma, a well-known weed, was taken in the present study to evaluate its allelopathic potentiality under laboratory condition. Aqueous methanol extracts of dried F. dichotoma were applied on the seedling growth of four dicotyledonous [cress (Lepidum sativum L.), lettuce (Lactuca sativa L.), alfalfa (Medicago sativa L.) and rapeseed {Brassica napus L.)], and four monocotyledonous [Italian ryegrass (Lolium multiflorum Lam.), barnyard grass (Echinochloa crus-galliL.), timothy (Phleumpratense L.) and sand fescue (Festuca megalura Nutt.)] at four concentrations 0.01, 0.03, 0.1 and 0.3 g dry weight (DW) equivalent extract/ ml. The seedling growth of all test plant species experienced an inhibition in all concentrations by the extracts of F. dichotoma and the inhibition was concentration-dependent. A complete inhibition of lettuce seedlingwas found at 0.1 g DW equivalent extract/ml and also the seedling growth of cress, lettuce, alfalfa and sand fescue was inhibited completely at the concentration of 0.3 g DW equivalent extract/ml. Considering concentrations required for 50% growth inhibition shoot of alfalfa and root of lettuce showed most sensitivity to the extract of F. dichotoma. These results imply that Fimbristylis dichotoma may have allelopathic properties and may contain allelochemicals which may exert deleterious effect to itssurrounding environment.
机译：具有强化感作用潜力的杂草植物通过释放化感物质而在作物领域中具有竞争优势。本研究采用了一种众所周知的杂草Fimbristylis dichotoma，以评估其在实验室条件下的化感潜力。将干燥的二叉菜的甲醇水溶液提取物用于四个双子叶植物（水芹（Lepidum sativum L.），莴苣（Lactuca sativa L.），苜蓿（Medicago sativa L.）和油菜籽（Brassica napus L.）]的幼苗生长。 ，以及四个浓度分别为0.01、0.03、0.1和0.3的四个单子叶植物[意大利黑麦草（Lolium multiflorum Lam。），bar草（Echinochloa crus-galliL。），蒂莫西（Phleumpratense L.）和沙羊茅（Festuca megalura Nutt。）]。 g干重（DW）当量提取物/ ml。所有测试植物物种的幼苗生长在所有浓度下均受到二叉草提取物的抑制，并且该抑制是浓度依赖性的。以0.1g DW当量提取物/ ml发现了对莴苣幼苗的完全抑制，并且以0.3g DW当量提取物/ ml的浓度完全抑制了水芹，生菜，苜蓿和沙羊茅的幼苗生长。考虑到苜蓿和生菜根的50％生长抑制芽所需的浓度显示对双歧镰刀提取物最敏感。这些结果暗示了双翅菌（Fimbristylis dichotoma）可能具有化感作用，并且可能含有化感物质，可能对其周围环境产生有害影响。

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