title: Phytotoxicity of 4,8-dihydroxy-1-tetralone isolated from Carya cathayensis Sarg. to various plant species.
abstract: The aqueous extract from Carya cathayensis Sarg. exocarp was centrifuged, filtered, and separated into 11 elution fractions by X-5 macroporous resin chromatography. A phenolic compound, 4,8-dihydroxy-1-tetralone (4,8-DHT) was isolated from the fractions with the strongest phytotoxicity by bioassy-guided fractionation, and investigated for phytotoxicity on lettuce (Latuca sativa L.), radish (Raphanus sativus L.), cucumber (Cucumis sativus L.), onion (Allium cepa L.) and wheat (Triticum aestivum L.). The testing results showed that the treatment with 0.6 mM 4,8-DHT could significantly depress the germination vigor of lettuce and wheat, reduce the germination rate of lettuce and cucumber, and also inhibit radicle length, plumule length, and fresh weight of seedlings of lettuce and onion, but could significantly promote plumule length and fresh weight of seedlings of cucumber (p < 0.05). For the tested five plants, the 4,8-DHT was the most active to the seed germination and seedling growth of lettuce, indicating that the phytotoxicity of 4,8-DHT had the selectivity of dosage, action target (plant type) and content (seed germination or seedling growth).
authors.affiliation: Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China.
authors.forename: Xian-Xian
authors.initials: XX
authors.lastname: Li
authors.affiliation: Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China.
authors.forename: Min-Feng
authors.initials: MF
authors.lastname: Yu
authors.affiliation: Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Ruan
authors.affiliation: Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China.
authors.forename: Yu-Zhu
authors.initials: YZ
authors.lastname: Zhang
authors.affiliation: Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China. wangqiangsky@263.net.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Wang
mesh_terms: D031325:Carya / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D018525:Germination / Q000187:drug effects; D018545:Lactuca / Q000187:drug effects / Q000254:growth & development; D019906:Nuclear Magnetic Resonance, Biomolecular; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology* / Q000633:toxicity; D044024:Tetralones / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology* / Q000633:toxicity
chemical_list: D010936:Plant Extracts; D044024:Tetralones