空心莲子草水浸提液的化感作用及化感物质分析  

Allelopathic Effects and Allelochemicals analysis of the Aqueous Extracts of Alternanthera philoxeroides

作　　者：杜照奎[1,2] 李钧敏[2] 钟章成[1] 

机构地区：[1]西南大学三峡库区生态环境教育部重点实验室,重庆400715 [2]台州学院生态研究所,浙江临海317000

出　　处：《西南大学学报（自然科学版）》2012年第8期53-60,共8页Journal of Southwest University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(30370279,30670334);中央高校基本科研业务费专项资金资助项目(XDJK2011D009);台州学院2011年校立基金资助项目(2011PY15)

摘　　要：采用培养皿滤纸法研究空心莲子草根、根状茎、茎和叶水浸提液对高丹草种子萌发和幼苗生长的影响,并采用气相色谱-质谱联用技术对空心莲子草根、茎和叶水浸提液的化学成分进行了分析.结果表明:高丹草种子的萌发速率和萌发率均随浸提液体积质量分数的升高而降低;其幼苗的苗高和主根长在茎浸提液中表现出"低促高抑"效应,而在其他3种浸提液中为"低体积质量分数无影响,高体积质量分数抑制";从化感综合效应来看,茎水浸提液体积质量分数低于30mg/mL、根和根状茎体积质量分数低于2mg/mL时,对高丹草种子萌发和幼苗生长具有促进作用,否则为抑制效应.空心莲子草的化感成分中可能含有苯甲酸、邻羟基苯甲酸、邻苯二甲酸二甲酯、邻苯二甲酸二丁酯、邻苯二甲酸-丁基-异丁酯和邻苯二甲酸二异丁酯等.Allelopathic effects of aqueous extracts of from the root,rhizome,stem and leaf of Alternanthera philoxeroides on seed germination and seedling growth of sudex（Sorghum bicolor × S.Sudanense） were invesgated using Petri dish bioassays,and the chemical components of the aqueous extracts were analyzed by GC-MS.The results showed that the sudex seed germination speed and germination rate deceased with increasing concentrations of the aqueous extracts from different parts（root,rhizome,stem and leaf） of A.philoxeroides,and the aqueous extract from the stem promoted shoot height and taproot length at lower concentration promotions and inhibited them at higher concentrations,while the aqueous extract from the other parts had no influences at lower concentration promotions and inhibited them at higher concentrations,As for the allelopathic effects,it had promotion effects to the sudex seed germinaion and seedling growth when the aqueous extract from the stem was at a concentration of less than 30 mg/mL,and the aqueous extract from the root and rhizome was at a concentration of less than 2mg/mL,otherwise the aqueous extract would have an inhibition effect.The main chemical compounds contained in the extracts included benzenecarboxylic acid,benzaldehyde,2-hydroxy-benzoic acid,1,2-benzenedicarboxylic acid,dimethyl ester,1,2-benzenedicarboxylic acid,dibutyl ester,1,2-benzenedicarboxylic acid,butyl 2-methylpropyl ester,1,2-benzenedicarboxylic acid and bis（2-methylpropyl） ester.

关 键 词：空心莲子草 高丹草 化感作用 化感物质 

分 类 号：Q949.745.2[生物学—植物学]