Rotenone and deguelin in Tephrosia vogelii at several stages of maturity
1972
Hagemann, J.W. | Pearl, M.B. | Higgins, J.J. | Delfel, N.E. | Earle, F.R.
Changes in rotenone (R) and deguelin (D) concentrations were followed by thin-layer densitometry in the leaflets and other parts of two lines of Tephrosia vogelii Hook. f. In one line, relatively free of R, total leaflet D increased from 1.6 to 3.2%. In the other line leaflet R increased with plant age from 0.3 to 1.1% and leaflet D increased from 1.1 to 1.9%. Rotenoid levels were higher in leaves formed later in the growing season but remained essentially constant in a given leaf throughout its life on the plant. Concentrations of rotenoids in the other plant parts were substantially lower and increased little or none as the plant matured. Abscission of lower leaves and increase in stem-to-leaf ratio combined to reduce the total rotenoid content of the whole plant late in the season.
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