Chemical composition and phytotoxicity of the essential oil of Encelia farinosa growing in the Sonoran Desert
Chemical composition and phytotoxicity of the essential oil of Encelia farinosa growing in the Sonoran Desert
复制标题
生长在索诺兰沙漠的 Encelia farinosa 精油的化学成分和植物毒性
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
W. Setzer
中科院分区：
文献类型：
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作者：
C. Wright;B. Chhetri;W. Setzer
采用水蒸气蒸馏法从美国亚利桑那州图森市野生玉米粉棒的叶和茎中提取挥发油，用气相色谱-质谱联用技术分析，共鉴定出89种化合物，分别占叶油成分的95.7%和茎油成分的99.8%。叶油中主要成分为泽兰色烯（20.8%）、柠檬烯（14.1%）、α-蒎烯（11.6%）、双环大根香叶烯（9.8%）、桧烯（9.2%）和大根香叶烯D（7.4%），茎油中主要成分为α-蒎烯（53.5%）和双环大根香叶烯（10.7%）。筛选精油对莴苣（Lactuca sativa）（莴苣）和多年生黑麦草（Lolium perenne）（多年生黑麦草）的种子萌发抑制和幼苗生长抑制。虽然精油在抑制种子萌发方面相对不活跃（约40%的发芽抑制L。sativa对L.在1.0mg/mL浓度下，它们均显著抑制胚根和下胚轴的伸长
The essential oils from the leaves and stems of Encelia farinosa growing wild in Tucson, Arizona were obtained by hydrodistillation and analyzed by GC-MS. A total of 89 compounds were identified leaf and stem essential oils accounting for 95.7% of the leaf oil composition and 99.8% of the stem oil composition. The major components of the leaf oil were eupatoriochromene (20.8%), limonene (14.1%), α-pinene (11.6%), bicyclogermacrene (9.8%), sabinene (9.2%) and germacrene D (7.4%), while the stem oil was dominated by α-pinene (53.5%) and bicyclogermacrene (10.7%). The essential oils were screened for seed germination inhibition and seedling growth inhibition against Lactuca sativa (lettuce) and Lolium perenne (perennial ryegrass). Although the essential oils were relatively inactive in terms of inhibiting seed germination (about 40% germination inhibition of L. sativa and about 10% inhibition of L. perenne at 4.0 mg/mL), they both significantly inhibited radicle and hypocotyl elongation at 1.0 mg/mL