Allelopathic potential of Sassafras albidum and Pinus taeda essential oils

作者：Kennedy J Erin; Dave Purva C; Harbin Lindsay N; Setzer William N^*

来源：Allelopathy Journal, 2011, 27(1): 111-122.

• Camphor
• cineole
• essential oil composition
• Lactuca sativa
• limonene
• Lolium perenne
• pinene
• Pinus taeda
• Sassafras albidum
• terpineol

The bark essential oil of Sassafras albidum was obtained by hydrodistillation and analyzed by GC-MS. The major components were a-pinene (38-62%), camphene (3-5%), p-pinene (10-13%), 1,8-cineole (7-10%), camphor (2-5%) and alpha-terpineol (4-12%). Pinus taeda leaf, bark and wood essential oils were obtained and analyzed by GC-MS. alpha-Pinene dominated in all three P. taeda essential oils (50%, 44% and 67%, respectively), however, beta-pinene was also abundant (22%, 8% and 27%, respectively). P. taeda bark oil also had large amounts of myrcene (18%) and beta-phellandrene (17%). S. albidum bark oil and P. taeda leaf oil, along with the essential oil components, [alpha-pinene, camphene, beta-pinene, limonene, 1,8-cineole, camphor and a-terpineol] were screened for phytotoxic effects on lettuce (Lactuca saliva) and perennial ryegrass (Lolium perenne). S. albidum bark oil inhibited the seed germination of L. saliva (IC(50) = 1834 mu g/mL) and L. perenne (IC(50) = 1848 mu g/mL), while, camphor (IC(50) = 3.1 mM) and alpha-terpineol (IC(50) = 2.9 mM) inhibited the germination of L. saliva; and beta-pinene (IC(50) = 6.4 mM) and limonene (IC(50)= 8.8 mm) inhibited L. perenne seed germination. Both S. albidum bark oil and P. taeda leaf oil, as well as all of the major essential oil components tested, but especially alpha-terpineol, significantly inhibited the radicle elongation of L. saliva. Similarly, both essential oils and all of the components except camphene significantly inhibited the radicle elongation in L. perenne. The phytotoxic effects of S. albidum bark oil and L. perenne leaf oil are consistent with their hypothetical allelopathy.

• 出版日期2011-1