TANG Chenglin,LUO Fulai,ZHAO Zhi,et al.Allelopathy of Root Exudates of Pinellia ternate[J].Northern Horticulture,2017,41(15):129-135.[doi:10.11937/bfyy.20165024]
半夏根系分泌物化感作用研究
- Title:
- Allelopathy of Root Exudates of Pinellia ternate
- Keywords:
- Pinellia ternate; root exudates; allelopathy; autotoxins
- 文献标志码:
- A
- 摘要:
- 以半夏根系分泌物及其不同极性组分为供试材料，半夏、莴笋、萝卜、白菜、苋菜为受试材料，采用生物测试的方法研究半夏根系分泌物对不同受试材料的化感效应。结果表明:半夏根系分泌物对萝卜、莴笋、半夏有化感抑制作用，作用强度为半夏>莴笋>萝卜。半夏根系分泌物的化感作用具有浓度效应，当浓度为1.122 3 g?L-1时，化感作用最强，对受试材料均呈化感抑制作用。半夏根系产生的化感自毒物质极性分布范围广，各极性部位产生自毒作用的强度不同，其中乙酸乙酯相最强，能强烈抑制半夏珠芽萌发和幼苗生长。根系分泌物可能是引起半夏连作障碍的原因之一，半夏根系分泌的化感物质具有一定选择性，只有在合适浓度、遇到合适受体时才会产生化感作用。半夏根系产生的化感自毒物质极性分布范围广，主要存在于乙酸乙酯部位，能强烈抑制半夏珠芽萌发和幼苗生长，可能是大田生产中半夏连作地出苗率低、倒苗严重的原因之一。
- Abstract:
- To research the allelopathic effect of Pinellia ternate root secretions to different acceptor materials with bioassay method,Pinellia ternate root secretions and its different polar components were used as donor materials,and Pinellia ternate,asparagus lettuce,radish,Chinese cabbage and edible amaranth were used as acceptor materials.The results showed that Pinellia ternate root secretions had allelopathic inhibitory effects to Pinellia ternate,asparagus lettuce and radish,and the effective strength was the maximum to Pinellia ternate,followed by asparagus lettuce.The allelopathic effect of Pinellia ternate root secretions had concentration effect,and the allelopathic effect was the strongest with the concentration 1.122 3 g?L-1,and showd allelopathic inhibitory effects to all acceptor materials.The allelochemicals produced by Pinellia ternate roots had a large polar scope,and the autotoxicity strength generated by different polarity parts was different,of which the autotoxicity strength generated by ethyl acetate extracts was the strongest,and could strongly inhibitor Pinellia ternate buldlet to germinate and seedling to grow.Root secretions might be one of the reasons that generates Pinellia ternate continuous cropping obstacle and one of the reasons that low emergence rate and serious sprout of Pinellia ternate in field,allelochemicals produced by Pinellia ternate root secretions had some selectivity,allelopathic effect showed only under suitable concentration and acceptors.
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备注/Memo
第一作者简介：唐成林(1991-),男,硕士研究生,研究方向为药用植物栽培。E-mail:673370283@qq.com.责任作者：罗夫来(1972-),男,博士，副教授，硕士生导师,现主要从事药用植物资源评价及药用植物栽培与质量调控等研究工作。E-mail:luo512658@163.com.基金项目：国家自然科学基金资助项目（81460577）;贵州省创新人才团队建设资助项目（黔科合人才团队20104006）；贵州大学作物学与耕作学研究生创新基地资助项目（贵大作栽研CXJJ[2017]001）。收稿日期：2017-02-08