Allelopathic Effects of Aqueous Extract of Torreya fargesii Aril on Seed Germination and Seedling Growth of Radish, Mustard and Cabbage

作     者：Xiaoling XIE Bo JIANG Xianrong ZHOU Lianxue ZHAO Jianhua WANG Jin HANG 

作者机构：College of Life Science and TechnologyYangtze Normal UniversityFuling 408100China Zhenxiong County Yile Middle SchoolZhenxiong 657200China 

出 版 物：《Agricultural Biotechnology》 (农业生物技术（英文版）)

年 卷 期：2016年第5卷第4期

页      面：11-17页

学科分类：0907[农学-林学] 08[工学] 0829[工学-林业工程] 09[农学] 

基　　金：Supported by National Natural Science Foundation of China(31470568) Scientific and Technological Research Program of Chongqing Municipal Education Commission(KJ1401204) Program for Innovation Team Building of Yangtze Normal University(2014XJTD06) 

主　　题：Torreya fargesii Franch. Aril Aqueous extract Seed germination Allelopathic effect 

摘      要：[Objective] This study aimed to investigate the allelopathic effects of Torreya fargesii aril. [Method] By indoor bioassay, the effects of different con-centrations （10, 20,40, 80 g/L） of aqueous extract of T. fargesii aril on seed germination rate, seedling root length, seedling height, fresh weight, chlorophyll content, malondialdehyde （MDA） content and anti oxidative enzyme activities of radish, mustard and cabbage were analyzed and compared. [ Result] Different concentrations of aqueous extract of T. fargesii aril inhibited seed germination and seedling growth of three crops, and the inhibitory effects were enhanced with the increase of concentration. Seedling height and fresh weight of three crops were improved by low concentrations of aqueous extract of T. fargesii aril and inhibited by high concentrations of aqueous extract. Overall, aqueous extract of T. fargesii aril exhibited allelopathic inhibitory effects on three crops, and the level of allelopath-ic inhibitory effects demonstrated a descending order of radish 〉 mustard 〉 cabbage. Compared with the control group, 80 g/L aqueous extract of T. fargesii aril almost significantly reduced seed germination rate, seedling root length, seedling height, fresh weight and chlorophyll content, and significantly improved MDA con-tent and antioxidative enzyme （SOD, CAT, POD） activities of radish, mustard and cabbage （P 〈 0 .0 5 ） . [ Conclusion] Aqueous extract of T. fargesii aril exhibited remarkable allelopathic inhibitory effects on seed germination of radish, mustard and cabbage, which indicated that there might be dormancy-associated germination in-hibiting allelochemicals in T. fargesii aril. This study provided theoretical basis for subsequent clarification of the mechanism of seed dormancy of T. fargesii.