Growth inhibitory alkaloids from mesquite (Prosopis juliflora (Sw.) DC.) leaves.
Plant growth inhibitory alkaloids were isolated from the extract of mesquite [Prosopis juliflora (Sw.) DC.] leaves. Their chemical structures were established by ESI-MS, 1H and 13C NMR spectra analysis. The I50 value (concentration required for 50% inhibition of control) for root growth of cress (Lepidium sativum L.) seedlings was 400 microM for 3''''-oxo-juliprosopine, 500 microM for secojuliprosopinal, and 100 microM for a (1:1) mixture of 3-oxo-juliprosine and 3'-oxo-juliprosine, respectively. On the other hand, the minimum concentration exhibiting inhibitory effect on shoot growth of cress seedlings was 10 microM for 3''''-oxo-juliprosopine, 100 microM for secojuliprosopinal, and 1 microM for a (1:1) mixture of 3-oxo-juliprosine and 3'-oxo-juliprosine, respectively. Among these compounds, a (1:1) mixture of 3-oxo-juliprosine and 3'-oxo-juliprosine exhibited the strongest inhibitory effect on the growth of cress seedlings.
Doctoral Program in Agricultural Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8572, Japan. nakanohr@affrc.go.jp
Hiroshi
H
Nakano
Eri
E
Nakajima
Syuntaro
S
Hiradate
Yoshiharu
Y
Fujii
Kosumi
K
Yamada
Hideyuki
H
Shigemori
Koji
K
Hasegawa
D000470:Alkaloids / Q000737:chemistry / Q000494:pharmacology*; D001681:Biological Assay; D006131:Growth Inhibitors / Q000737:chemistry / Q000494:pharmacology*; D031220:Lepidium sativum / Q000187:drug effects / Q000254:growth & development; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010937:Plant Growth Regulators / Q000737:chemistry / Q000494:pharmacology*; D018515:Plant Leaves / Q000737:chemistry; D018514:Plant Structures / Q000187:drug effects / Q000254:growth & development; D029862:Prosopis / Q000737:chemistry*
D000470:Alkaloids; D006131:Growth Inhibitors; D010937:Plant Growth Regulators