Phytotoxic aromatic constituents of Oxalis pes-caprae.
A cinnamic acid ester, two dihydrocinnamic acid esters, a noroxyneolignan, a dibenzyl ether derivative, along with common aromatic compounds and flavonoids were isolated from the extracts of fresh leaves and twigs of Oxalis pes-caprae. The structures of these aromatic compounds were elucidated on the basis of spectroscopic analyses, especially 2D-NMR techniques. Their effects on the germination and growth of Lactuca sativa L. as standard target species have been studied at concentrations ranging from 10(-4) to 10(-7) M. The activities of some compounds were higher than that of pendimethalin, a commercial pre-emergence herbicide.
DellaGreca
Marina
M
UDR Napoli 4 (Consorzio INCA), Dipartimento di Chimica Organica e Biochimica, Università Federico II, Complesso Universitario Monte Sant'Angelo, Via Cinthia 4, I-80126 Napoli. dellagre@unina.it
Previtera
Lucio
L
Purcaro
Raffaella
R
Zarrelli
Armando
A
D002850:Chromatography, Gel; D002851:Chromatography, High Pressure Liquid; D002934:Cinnamates / Q000737:chemistry; D004952:Esters / Q000737:chemistry / Q000302:isolation & purification / Q000633:toxicity*; D004987:Ethers / Q000737:chemistry / Q000302:isolation & purification / Q000633:toxicity*; D006540:Herbicides / Q000737:chemistry / Q000302:isolation & purification / Q000633:toxicity*; D018545:Lactuca / Q000187:drug effects / Q000254:growth & development; D019684:Magnoliopsida / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry
D002934:Cinnamates; D004952:Esters; D004987:Ethers; D006540:Herbicides; C029010:cinnamic acid