Effects of rice allelochemicals on the microbial community of flooded paddy soil

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	Effects of rice allelochemicals on the microbial community of flooded paddy soil
	Kong, CH; Gu, Y; Wang, P; Kong, CH, Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China
刊名	ALLELOPATHY JOURNAL
	2008
卷号	22 期号:2 页码:299-309
关键词	Allelochemical Flooded Soil Microbial Community Structure Oryza Sativa L. Root Exudates 5 7 4 '-trihydroxy-3 ' 5 '-dimethoxyflavone
ISSN号	0971-4693
英文摘要	Allelopathic rice roots release the allelochemicals in soil at significant rates to interact with soil microorganisms, but their impact on microbial community structure of flooded paddy soil has not been studied yet. In this Study, phospholipid fatty acid (PLFA) analysis was used 10 evaluate the entire microbial community of Soil incubated with rice allelochemicals (5,7,4'-trihydroxy-3',5'-dimethoxyflavone and benzoic acid) and root exudates under flooded condition. It appeared from the results showed that the total PLFAs, bacteria and fungi all showed the largest increase in root exudates amendment at day 11 benzoic acid at day 3 and the flavone at day 5. respectively. Anaerobic bacteria increased more in allelopathic root exudates than ill non-allelopathic root exudates. Benzoic acid was less stimulatory to anaerobes than flavone. There was a clear separation among the different treatments by principal component analysis (PCA). The PC1 and PC2 components together accounted for 62.8% of the variation (PC1=40.4%, PC2=22.4%) in data. Besides, the stepwise discriminating analysis showed DF1 and DF2 accounted for 70.5% and 21.1% of the variance, respectively. For the correlations of 8 selected fatty acids with the two DFs, i15:0, a15:0, 10Me16:0 and 10Me18:0 were correlated with DF2 whereas 16:1 omega 7c, 18:2 omega 6c 18:1 omega 9c and cy19:0 were correlated with DF2. These results suggested that allelopathic rice could modify microbial community structure in flooded paddy soil to their advantage through release of allelochemicals.
学科主题	Agronomy
语种	英语
WOS记录号	WOS:000259652600006
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/54365]
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,Gu, Y,Wang, P,et al. Effects of rice allelochemicals on the microbial community of flooded paddy soil[J]. ALLELOPATHY JOURNAL,2008,22(2):299-309.
APA	Kong, CH,Gu, Y,Wang, P,&Kong, CH, Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China.(2008).Effects of rice allelochemicals on the microbial community of flooded paddy soil.ALLELOPATHY JOURNAL,22(2),299-309.
MLA	Kong, CH,et al."Effects of rice allelochemicals on the microbial community of flooded paddy soil".ALLELOPATHY JOURNAL 22.2(2008):299-309.