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《China Journal of Chinese Materia Medica》 2012-22
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Effect of Astragalus membranaceus var.mongholicus seed extracts on seed germination and seedling growth of different Codonopsis pilosula caltiver

GUO Feng-xia1,WU Zhi-jiang1,CHEN Yuan1,2,XI Zhuo-xia3,ZHANG Xiao-hu3,YAO Li-rong4,CHEN Xiang4(1.College of Life Science and Technology Gansu Key Laboratory of Crop Genetic & Germplasm Enhancement Demonstration Center of Experiments and Teaching for Plant Productions Gansu Provincial Key Laboratory of Aridland Crop Science,Gansu Agricultural University,Lanzhou 730070,China; 2.College of Agronomy,Gansu Agricultural University,Lanzhou 730070,China; 3.Gansu Fuzheng Pharmaceutical Sciences and Technologies Co.,Ltd.,Dingxi 743000,China; 4.Department of Geography Tourism College,Shanghai Normal Umiversity,Shanghai 200234,China)  
Objective: To reveal the allelopathy effect of Astragalus membranaceus var.mongholicus seeds and provide information for the intercrop production.Method: The A.membranaceus.var.mongholicus seeds were soaked in distilled water for different time(12,24,36,48,60 h),and then the seed extracts were used to study their effects on the seed germination,seedling growth and development of two Codonopsis pilosula.Result: The A.membranaceus var.mongholicus seeds contained some allelopathy compounds.Their soaked liquid had significantly influence on the seed germination and seedling growth of C.pilosula.The seed germination rate,germination power,germination index and vigor index of two C.pilosula calrivar were improved and then inhabited with soaking time elongation.The extract soaking for 24 h significantly improved the germination traits but the extract for 60 h appeared different degrees of inhibiting vigor.The seed extracts soaking ranging between 12 and 60 h all significantly improved the above plant growth of C.pilosula but significant inhibited their radicle growth in length.And with the soaking time elongation the facilitation effect weakened and the inhibiting effect enhanced,especially more significant in the C.pilosula caltivar(Baitiaodangshen).Conclusion: The A.membranaceus var.mongholicus seeds have allelopathic compounds and the endogenous inhibitor can be extracted when soaked for more than 24 h in water with intact seeds,resulting in improvement of seed germination rate.The C.pilosula could be intercropped in A.membranaceus var.mongholicus field,however,when intercroped it should notice that the intercrop proportion should vary with the caltivar.
【Fund】: 国家科技支撑计划项目(2007BAI37B03);; 国家中医药管理局第四次全国中药资源普查项目(201207002-02-12);; 甘肃农业大学教学研究项目;; 甘肃省干旱生境作物学重点实验室开放基金项目(05);; 校企合作项目;; 企业创新基金项目(10C2616203384)
【CateGory Index】: S567.53
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