No abstract

Several 8-oxabicyclo[3.2.1]oct-6-en-3-one derivatives have been prepared via the [3 + 4] cycloaddition between the oxyallyl carbocation generated from polybromoketones and alkylfurans. The selective effects of these compounds on the radicle growth of a monocotyledon [sorghum (Sorghum bicolor L.)] and a dicotyledon [cucumber (Cucumis sativus L.)] were evaluated. All of the test compounds, at the concentration of 100 μg mL-1, stimulated cucumber root growth (5−30%), but they inhibited sorghum root growth (23−56%). None of the compounds had any effect on the percent of germination of the species tested. Keywords: Plant growth regulators; oxyallyl cation; cucumber; sorghum

No abstract

Five new derivatives of 6α,7β-dihydroxyvouacapan-17β-oic acid were prepared. The effect of these new furan diterpenes on the radicle growth of Sorghum bicolor L. and Cucumis sativus L. was evaluated. All compounds, at a concentration of 100 ppm, showed an inhibitory effect (40–63%) on the radicle growth of S. bicolor L. and a small stimulatory growth effect (3–15%) on the radicle of C. sativus L. None of the compounds had any effect on the germination rate of both plants.

No abstract