Impact of allelochemical exuded from allelopathic rice on soil microbial community
文献类型：期刊论文
| 作者 | Kong, CH ; Wang, P ; Zhao, H ; Xu, XH ; Zhu, YD |
| 刊名 | SOIL BIOLOGY & BIOCHEMISTRY
 |
| 出版日期 | 2008 |
| 卷号 | 40期号:7页码:1862-1869 |
| 关键词 | Oryza sativa L. allelopathy flavone O-glycoside root exudates microbial community rhizosphere |
| ISSN号 | 0038-0717 |
| 通讯作者 | Kong, CH, Chinese Acad Sci, Inst Appl Ecol, Wenhua Rd 72, Shenyang 110016, Peoples R China |
| 中文摘要 | Allelopathic rice releases allelochemicals from its roots to paddy soils at early growth stages to inhibit neighboring weeds. However, little is currently known about the effects of allelochemicals on soil microbes. In this study, we show that allelopathic rice can have great impact on the population and community structure of soil microbes. Allelopathic rice P1312777 seedlings reduced the culturable microbial population and total PLFA when compared to non-allelopathic rice Liaojing-9. Similar results were observed when, instead of growing seedlings, soils were incubated with plant root exudates. This result demonstrates that the composition of root exudates from the rice varieties tested contributes to the soil microbial community. Further experiments showed that the microbial community was affected by the allelochemical 5,4'-dihydroxy-3',5'-dimethoxy-7-O-beta-glucopyranosylflavone exuded from allelopathic rice roots, through immediately hydrolyzing glucose with stimulation on soil bacteria and aglycone (5,7,4'-trihydroxy-3',5'-dimethoxyflavone) with inhibition on soil fungi. This result indicates that the flavone O-glycoside can provide carbon and interact with soil microbes. PC analysis of the fatty acid data clearly separated the allelopathic P1312777 and the non-allelopathic Liaojing-9 variety (PC1 = 46.4%, PC2 = 20.3%). Similarly, the first principal component (PC1 = 37.4%) together with the second principal component (PC2 = 17.3%) explained 54.7% of the variation between the allelopathic and non-allelopathic root exudates. Furthermore, the canonical correlation between allelopathic root exudates and the flavone O-glycoside was statistically significant (Canonical R = 0.889, chi(2) (25) = 69.72, p = 0.0041). Although the data generated in this study were not completely consistent between culturable microbes and PLFA profile, it is a fact that variation in soil microbial populations and community structures could be distinguished by the allelopathic and non-allelopathic rice varieties tested. Our results suggest that individual components of rice root exudates, such as allelochemicals from allelopathic rice, can modify the soil microbial community. (C) 2008 Elsevier Ltd. All rights reserved. |
| 学科主题 | Soil Science |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000257616100036 |
| 公开日期 | 2011-09-23 |
| 源URL | [http://210.72.129.5/handle/321005/54417]  |
| 专题 | 沈阳应用生态研究所_沈阳应用生态研究所_期刊论文 |
| 推荐引用方式 GB/T 7714 | Kong, CH,Wang, P,Zhao, H,et al. Impact of allelochemical exuded from allelopathic rice on soil microbial community[J]. SOIL BIOLOGY & BIOCHEMISTRY,2008,40(7):1862-1869. |
| APA | Kong, CH,Wang, P,Zhao, H,Xu, XH,&Zhu, YD.(2008).Impact of allelochemical exuded from allelopathic rice on soil microbial community.SOIL BIOLOGY & BIOCHEMISTRY,40(7),1862-1869. |
| MLA | Kong, CH,et al."Impact of allelochemical exuded from allelopathic rice on soil microbial community".SOIL BIOLOGY & BIOCHEMISTRY 40.7(2008):1862-1869. |
入库方式： OAI收割
来源：沈阳应用生态研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。