Activity and allelopathy of soil of flavone O-glycosides from rice
文献类型：期刊论文
| 作者 | Kong, CH ; Zhao, H ; Xu, XH ; Wang, P ; Gu, Y |
| 刊名 | JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
 |
| 出版日期 | 2007 |
| 卷号 | 55期号:15页码:6007-6012 |
| 关键词 | Oryza sativa L. allelopathy flavone O-glycosides bioactivity soil TLC soil dynamics |
| ISSN号 | 0021-8561 |
| 通讯作者 | Kong, CH, Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China |
| 中文摘要 | Two flavone O-glycosides were isolated from allelopathic rice seedlings and have been identified as 5,4'-dihydroxy-3',5'-dimethoxy-7-O-beta-glucopyranosylflavone and 7,4'-dihydroxy-3',5'-dimethoxy-5-O-beta-glucopyranosylflavone. Considerable levels of these glycosides could be found in allelopathic rice tissues. They could not be detected in the soils growing these allelopathic rice seedlings. Only their aglycone, 5,7,4'-trihydroxy-3',5'-dimethoxyflavone, could be found in the soil. Further experiments showed that two flavone O-glycosides were exuded from allelopathic rice roots to the rihzosphere and then transformed into their aglycone form, that is, 5,7,4'-trihydroxy-3',5'-dimethoxyflavone, with a great diversity of biological activities on associated weeds and microbes by soil interactions once released. The glycosides degraded rapidly (t(1/2) < 2 h), whereas their aglycone was more resistant toward degradation in paddy soils, in which the half-life (t(1/2)) at low (25 mu g/g) and high (200 mu g/g) doses reached 19.86 +/- 3.64 h (r (2) = 0.97) and 28.78 +/- 3.72 h (r (2) = 0.98), respectively. Furthermore, the mobility of both glycosides and their aglycone in paddy soil was evaluated by soil TLC with bioassay. The mobility of the glycosides (R-f = 0.418 +/- 0.069, n = 18) is higher than that of the aglycone (R-f = 0.361 +/- 0.048, n = 18). The results suggested that two flavone O-glycosides are formed in rice biosynthesis and that storage of the allelochemicals and their aglycone 5,7,4'-trihydroxy-3',5'-dimethoxyflavone is the agent of alleloapthic rice which interferes with weeds or microbes in paddy soil. |
| 学科主题 | Agriculture, Multidisciplinary; Chemistry, Applied; Food Science & Technology |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000248085300017 |
| 公开日期 | 2011-09-23 |
| 源URL | [http://210.72.129.5/handle/321005/54657]  |
| 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,Zhao, H,Xu, XH,et al. Activity and allelopathy of soil of flavone O-glycosides from rice[J]. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY,2007,55(15):6007-6012. |
| APA | Kong, CH,Zhao, H,Xu, XH,Wang, P,&Gu, Y.(2007).Activity and allelopathy of soil of flavone O-glycosides from rice.JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY,55(15),6007-6012. |
| MLA | Kong, CH,et al."Activity and allelopathy of soil of flavone O-glycosides from rice".JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 55.15(2007):6007-6012. |
入库方式： OAI收割
来源：沈阳应用生态研究所
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