[1]刘勇,刘燕,胡茂飞,等.头花蓼水浸提液的化感自毒作用[J].江苏农业学报,2018,(03):520-526.[doi:doi:10.3969/j.issn.1000-4440.2018.03.006]
 LIU Yong,LIU Yan,HU Mao-fei,et al.Research on allelopathic autotoxicity of water extracts of Polygonum capitatum[J].,2018,(03):520-526.[doi:doi:10.3969/j.issn.1000-4440.2018.03.006]
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头花蓼水浸提液的化感自毒作用()
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江苏农业学报[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2018年03期
页码:
520-526
栏目:
遗传育种·生理生化
出版日期:
2018-06-25

文章信息/Info

Title:
Research on allelopathic autotoxicity of water extracts of Polygonum capitatum
作者:
刘勇123刘燕1胡茂飞1赵许朋1杨丹1
(1.贵阳学院生物与环境工程学院,贵州贵阳550005;2.中国科学院地球化学研究所环境地球化学国家重点实验室,贵州贵阳550002;3.中国科学院大学,北京100049)
Author(s):
LIU Yong123LIU Yan1HU Mao-fei1ZHAO Xu-peng1YANG Dan1
(1.School of Biological and Environmental Engineering, Guiyang University, Guiyang 550005, China;2.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry Chinese Academy of Sciences, Guiyang 550002, China;3.University of Chinese Academy of Science, Beijing 100049, China)
关键词:
头花蓼连作障碍化感自毒水浸提液
Keywords:
Polygonum capitatumcontinuous cropping obstacleallelopathic autotoxicitywater extracts
分类号:
S567.23
DOI:
doi:10.3969/j.issn.1000-4440.2018.03.006
文献标志码:
A
摘要:
为探讨头花蓼(Polygonum capitatum Buch-Ham exD. Don)不同部位水浸提液对其种子萌发及幼苗生长的影响,人工制备头花蓼根、茎、叶水浸提液并进行室内生物测定,结果表明头花蓼根、茎、叶水浸提液均在≤10 mg/ml时,对其种子发芽率、发芽势、发芽速率、发芽指数及活力指数等未产生明显抑制作用,甚至有轻微促进作用,随着浓度升高抑制作用越来越明显,浓度至500 mg/ml时种子发芽率仅约为对照的10%,发芽势降至0.8%,发芽速率仅为对照的1/12,发芽抑制率达80.4%以上,发芽指数和活力指数分别最低为0.5、1.1。在综合化感指数方面头花蓼不同部位水浸提液对种子萌发及幼苗生长抑制作用总体表现为茎>叶>根。综上,头花蓼水浸提液具有较明显的化感自毒作用,这种化感自毒作用可能是引起头花蓼连作障碍的重要因素。
Abstract:
To study the effect of water extracts from different parts (roots, stems and leaves) of Polygonum capitatum on its seed germination and seedling growth, the water extracts were prepared artificially and their bioactivity were tested. The results indicated that there were no inhibition on its seed germination rate, germination potential, germination speed, germination index and vigor index at lower concentrations (≤10 mg/ml) of different water extracts, and even which could promote the seed germination and seedling growth. However, the seed germination and seedling growth were inhibited by the concentrations of the water extracts at higher concentrations (>10 mg/ml). In particular, when the water extracts concentrations increased to 500 mg/ml, the seed germination rate and the germination potential were decreased to 10% and 0.8% compared to control, the germination speed was one-twelfth of the control, the inhibition rates on seed germination was up to 80.4%, and germination index and vigor index were 0.5 and 1.1, respectively. Generally, the order of inhibitory activity of water extracts from different parts of P. capitatum was stems, leaves and roots from strong to weak at the respect of the synthetical allelopathic index. In conclusion, the water extracts from different parts of P. capitatum had serious allelopathic autotoxicity, which could be an important factor for continuous cropping obstacle of P. capitatum.

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备注/Memo

备注/Memo:
收稿日期:2017-09-13 基金项目:贵州省教育厅基金项目[黔教合KY字(2015)452号];贵州省科技厅联合基金项目[黔科合LH字(2014)7168号];贵州省生物学教学团队项目(2017158322);贵州省教育厅大学生创新创业项目(121501401008);贵州省应用基础研究计划重大项目[黔科合J重大字(2015)2001号] 作者简介:刘勇(1987-),男,甘肃平凉人,博士,讲师,主要从事环境生态与污染修复研究。(E-mail)Lyong821mmm@163.com 通讯作者:刘燕(E-mail)gyly68@sina.com
更新日期/Last Update: 2018-07-04