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| 淹没对鄱阳湖洲滩灰化苔草化感抑藻的影响 | |
| 引用本文： | 李林, 陈峰, 赵荣芳. 淹没对鄱阳湖洲滩灰化苔草化感抑藻的影响[J]. 草业科学, 2015, 9(11): 1832-1837. DOI: 10.11829/j.issn.1001-0629.2015-0077 |
| 作者姓名： | 李林 陈峰 赵荣芳 |
| 作者单位： | 1.1. 江西师范大学 鄱阳湖湿地与流域研究教育部重点实验室,江西 南昌 330022;2.2. 江西师范大学地理与环境学院,江西 南昌 330022;3.;4.江西省水利规划设计院,江西 南昌 330029 |
| 基金项目： | 国家自然科学基金，江西省教育厅科研专题，江西省教育厅科学技术研究项目，鄱阳湖湿地与流域研究实验室开放基金 |
| 摘 要： | 基于植物化感抑藻原理,室外进行灰化苔草(Carex cinerascens)不同淹没高度培养试验,在光照培养箱中采用批式培养法开展灰化苔草浸泡液化感抑藻研究。研究结果显示,在各淹没高度下灰化苔草浸泡液均对铜绿微囊藻(Microcystis aeruginosa)产生化感抑制作用,抑制率随淹没高度的增加而增加,至全淹时抑制率达到最高,抑制率从64%增加至82%;灰化苔草主要通过根系分泌和秆叶组织破坏后释放化感物质,活体完整灰化苔草化感物质分泌较少。灰化苔草浸泡液试验组中铜绿微囊藻细胞直径较对照组铜绿微囊藻细胞直径缩短10%左右,藻细胞产生固缩现象;铜绿微囊藻胞内和胞外多糖积累,含量分别为1.6~1.8和1.7~2.0 pg·cell-1,微囊藻胞外多糖的积累形成胞外胶鞘并单细胞形成群体以抵御化感抑藻的胁迫作用。本研究为采用生态调控水位实现植物化感抑藻提供基础试验数据。 |
| 关 键 词： | 细胞直径 抑制率 多糖 化感 灰化苔草 |
| 收稿时间： | 2015-01-30 |
Effects of submerged height on allelopathic inhibition of Carex cinerascens to Microcystis aeruginosa in Poyang Lake marshland |
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| Lin LI, Feng CHEN, Rong-fang ZHAO. Effects of submerged height on allelopathic inhibition of Carex cinerascens to Microcystis aeruginosa in Poyang Lake marshland[J]. Pratacultural Science, 2015, 9(11): 1832-1837. DOI: 10.11829/j.issn.1001-0629.2015-0077 | |
| Authors: | Lin LI Feng CHEN Rong-fang ZHAO |
| Affiliation: | 1.1. Key Laboratory of Poyang Lake Wetland and Watershed Research, Ministry of Education, Jiangxi Normal University, Nanchang 330022, China;2.2. School of Geography and Environment, Jiangxi Normal University, Nanchang 330022, China;3.;4.Jiangxi Provincial Water Conservancy Planning and Designing Institute, Nanchang 330029, China |
| Abstract: | In the present study, the allelopathy inhibition of Carex cinerascens soaking culture to Microcystis aeruginosa were studied with batch culture in light incubator controlling light and temperature and outdoors with different submerge height. The results showed that C. cinerascens soaking liquid inhibited the growth of M. aeruginosa and the inhibitory ratios increased with submerge height increasing which increased from 64% to 82%. C. cinerascens mainly secreted allelochemical by root system and dead or damaged tissues. Cell diameter of M. aeruginosa decreased by 10% compared with that of control group which suggested that the cells pyknosis. Intracellular and extracellular polysaccharide content of M. aeruginosa were 1.6~1.8 and 1.7~2.0 pg·cell-1, respectively. These results suggested that M. aeruginosa resist the allelopathic inhibitionby polysaccharide accumulation to form extracellular rubber sheath and single cells assembled to form group. This study provided the basis data forusing ecological regulation water level to control water bloom. |
| Keywords: | cell diameter inhibition rate polysaccharide allelopathy Carex cinerascens |
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