Allelochemicals and Activities in a Replanted Chinese Fir (Cunninghamia lanceolata (Lamb.) Hook) Tree Ecosystem

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	Allelochemicals and Activities in a Replanted Chinese Fir (Cunninghamia lanceolata (Lamb.) Hook) Tree Ecosystem
	Kong, CH; Chen, LC; Xu, XH; Wang, P; Wang, SL; Kong, CH, Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China
刊名	JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
	2008
卷号	56 期号:24 页码:11734-11739
关键词	Autotoxicity Chinese Fir Cyclic Dipeptide Phenolic Acid Replant Problem Soil Phytotoxin
ISSN号	0021-8561
英文摘要	Autotoxicity is a major reason for replant problems in managed tree ecosystems. Studies have related phenolics-based allelochemicals to autotoxicity. We selected a 20-year-old replanted Chinese fir [Cunninghamia lancealata (Lamb.) Hook] tree ecosystem to isolate, identify, determine the biological activity of, and quantify soil phytotoxins. Eight common phenolics (coumarin, vanillin, isovanillin, and p-hydroxybenzoic, vanillic, benzoic, cinnamic, and ferulic acids), friedelin, and a novel cyclic dipeptide (6-hydroxy-1,3-dimethyl-8-nonadecyl-[1,4]-diazocane-2,5-diketone) were obtained by using the bioassay-guided isolation technique from toxic soil of the replanted Chinese fir tree ecosystem. Chemical structures were determined by spectroscopic means, including 2D-NMR (COSY, HMQC, HMBC, and NOESY) experiments. High concentrations of soil phenolics and friedelin were observed in the natural evergreen broadleaf forest (CK) rather than in the Chinese fir tree ecosystem. The phenolics and friedelin were not phytotoxic to Chinese fir trees. However, the cyclic dipeptide inhibited Chinese fir growth at soil concentrations determined in the replanted Chinese fir tree ecosystem. There was a significantly higher soil concentration of cyclic dipeptide in the replanted Chinese fir tree ecosystem than in a fresh Chinese fir tree ecosystem. The results suggest that phenolics and friedelin are not key allelochemicals since they are weakly phytotoxic and are detected in low concentrations in the replanted Chinese fir tree ecosystem, while cyclic dipeptide is a highly active allelochemical with a phytotoxic effect that limits offspring growth in the replanted Chinese fir tree ecosystem. The discovery of cyclic dipeptide, as well as a further understanding of its potential action mechanism in the replanted Chinese fir tree ecosystem, may contribute to solving the replant problems in managed tree ecosystems.
学科主题	Agriculture, Multidisciplinary ; Chemistry, Applied ; Food Science & Technology
语种	英语
WOS记录号	WOS:000261802400026
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/54299]
专题	沈阳应用生态研究所_沈阳应用生态研究所
通讯作者	Kong, CH, Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Kong, CH,Chen, LC,Xu, XH,et al. Allelochemicals and Activities in a Replanted Chinese Fir (Cunninghamia lanceolata (Lamb.) Hook) Tree Ecosystem[J]. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY,2008,56(24):11734-11739.
APA	Kong, CH,Chen, LC,Xu, XH,Wang, P,Wang, SL,&Kong, CH, Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China.(2008).Allelochemicals and Activities in a Replanted Chinese Fir (Cunninghamia lanceolata (Lamb.) Hook) Tree Ecosystem.JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY,56(24),11734-11739.
MLA	Kong, CH,et al."Allelochemicals and Activities in a Replanted Chinese Fir (Cunninghamia lanceolata (Lamb.) Hook) Tree Ecosystem".JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 56.24(2008):11734-11739.