Allelochemicals released by leaf residues of Micromeria fruticosa in soils, their uptake and metabolism by inhibited wheat seed
Allelochemicals released by leaf residues of Micromeria fruticosa in soils, their uptake and metabolism by inhibited wheat seed
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DOI：
10.1007/s11104-008-9731-0
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发表时间：
2008
期刊：
影响因子：
4.9
通讯作者：
N. Dudai;D. Chaimovitsh;O. Larkov;R. Fischer;Yahav Blaicher;A. Mayer
中科院分区：
文献类型：
--
作者：
N. Dudai;D. Chaimovitsh;O. Larkov;R. Fischer;Yahav Blaicher;A. Mayer
在灭菌和未灭菌的粘土和沙质土壤中研究了白色小花（Micromeria fruticosa）叶子对发芽小麦（Triticum aestivumL.）的化感作用。评估种子发芽和幼苗发育，并分析土壤和种子中的挥发性化合物。将叶子添加到土壤中会抑制种子的发芽和随后幼苗的发育。发现抑制程度与浓度有关，沙土中的抑制程度高于粘土。来自M的挥发性成分。在土壤和种子中发现了 fruticosa 及其衍生物。土壤灭菌抑制了挥发物的降解，但对出苗效果不显着。我们认为活性化合物胡薄荷酮和异薄荷醇可能是产生抑制作用的原因。结果表明，土壤系统中的叶子残留物可以通过释放挥发物引起化感作用。这些化合物在种子中代谢并能够抑制发芽。
The allelopathic effect of white micromeria (Micromeria fruticosa) leaves on germinating wheat(Triticum aestivumL.) was examined in sterilized and non-sterilized clay and sandy soils. Seed germination and seedling development were evaluated and the volatile compounds in the soil and in the seeds analyzed. The germination of the seeds and subsequent development of the seedlings were inhibited by addition of the leaves to the soil. The degree of inhibition was found to be concentration dependent, and the extent of inhibition was higher in the sandy soil than the clay. Volatile components fromM. fruticosaand their derivatives were found in the soil and in the seeds. Soil sterilization inhibited the degradation of the volatiles but its effect on seedling emergence was not significant. We suggest that the active compounds pulegone and isomenthol are the probable cause of the inhibitory effects. The results demonstrate that leaf residues in soil systems can cause allelopathic effects by releasing volatiles. The compounds are metabolized in the seeds and are able to lead to inhibition of germination.