Phytotoxicity of secondary metabolites from Aptenia cordifolia.
From the fresh leaves or twigs of Aptenia cordifolia, a total of 29 compounds were isolated, including the new tetranoroxyneolignan 18, the new dilignan 19, and the beta-ionone derivative 27, previously only known as a synthetic compound, together with 26 known compounds. The structures of the new products were determined by (1)H-, (13)C-, and 2D-NMR, as well as HR-MS analyses. The phytotoxic effects of the isolates on the germination and growth of the dicotyledon Lactuca sativa L. (lettuce) were studied in the concentration range 10(-4) to 10(-7) M. Several constituents of A. cordifolia were found to be equally active as or superior to 4-hydroxybenzoic acid (HBA) used as positive control.
DellaGreca
Marina
M
Dipartimento di Chimica Organica e Biochimica, Università Federico II, Complesso Universitario Monte Sant'Angelo, Via Cintia 4, I-80126 Napoli, Italy. dellagre@unina.it
Fiorentino
Antonio
A
Izzo
Angelina
A
Napoli
Filomena
F
Purcaro
Raffaella
R
Zarrelli
Armando
A
D035722:Aizoaceae / Q000737:chemistry / Q000378:metabolism*; D018525:Germination / Q000187:drug effects; D018545:Lactuca / Q000187:drug effects; D017705:Lignans / Q000737:chemistry / Q000302:isolation & purification / Q000633:toxicity; D009682:Magnetic Resonance Spectroscopy; D008968:Molecular Conformation
D017705:Lignans