Department of Horticultural Sciences, College of Agriculture, Shiraz University, Shiraz, Iran.
Nat Prod Res. 2010 Oct;24(17):1598-609. doi: 10.1080/14786411003754280.
This study was conducted to assess the allelopathic effect of essential oils (EOs) obtained from the aerial parts of two different ecotypes (ECTPs A and B) of Zataria multiflora Boiss. with the aim of evaluating their in vitro germination and growth inhibition potential. Gas chromatography (GC) and GC-mass spectrometry (GC-MS) analysis of the oils revealed that carvacrol and linalool (77.4% and 90.6%) were the two major oil components in ECTPs A and B, respectively, which were regarded as two different chemotypes. Other important volatile compounds found in ECTP A were α-pinene (2.7%), p-cymene (7.9%) and γ-terpinene (3.5%). However, in ECTP B these compounds were in lesser amounts and γ-terpinene was not detected. The inhibitory effects of both EOs of ECTPs at concentrations of 0, 80, 160, 320 and 640 µL L⁻¹ on the seed germination and seedling growth of four noxious weeds were evaluated. A significant reduction (p ≤ 0.05) in germination rate, seedling length, root and stem fresh and dry weights were observed by ECTPs; the highest suppressing effect was observed at 320 and 640 µL L⁻¹. The results reported in this study suggest that herbicidal properties of the two ECTP oils could be attributed to their major components.
本研究旨在评估两种不同生态型（ECTP A 和 B）的泽兰挥发油（EOs）的化感作用，评估其体外萌发和生长抑制潜力。对油的气相色谱（GC）和气相色谱-质谱（GC-MS）分析表明，香芹酚和芳樟醇（77.4%和 90.6%）分别是 ECTP A 和 B 的两种主要油成分，这两种成分被认为是两种不同的化学型。在 ECTP A 中还发现了其他重要的挥发性化合物，如α-蒎烯（2.7%）、对伞花烃（7.9%）和γ-萜品烯（3.5%）。然而，在 ECTP B 中这些化合物的含量较少，且未检测到γ-萜品烯。在浓度为 0、80、160、320 和 640 µL L⁻¹时，两种 ECTP 的 EO 对四种恶性杂草种子的萌发和幼苗生长的抑制作用进行了评估。ECTP 显著降低了（p ≤ 0.05）种子萌发率、幼苗长度、根和茎的鲜重和干重；在 320 和 640 µL L⁻¹时抑制作用最强。本研究结果表明，两种 ECTP 油的除草特性可能与其主要成分有关。
