Allantoin involved in species interactions with rice and other organisms in paddy soil

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	Allantoin involved in species interactions with rice and other organisms in paddy soil
	Wang, P; Kong, CH; Hu, F; Xu, XH; Kong, CH, Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China
刊名	PLANT AND SOIL
	2007
卷号	296 期号:1-2 页码:43-51
关键词	Allantoin Allelopathy Echinochloa Crus-galli Oryza Sativa Soil Microbe Species Interaction Stimulation
ISSN号	0032-079X
英文摘要	Allantoin (5-ureidohydantoin) plays an essential role in the assimilation, metabolism, transport, and storage of nitrogen in numerous higher plants, but its ecological implications are largely unknown. In this study allantoin was found in tissues of 11 rice (Oryza sativa) varieties tested, and its structure was characterised by X-ray diffraction analysis to confirm the fact that allantoin was actually obtained from the rice plants. Furthermore, the endogenous allantoin was exuded from the rice roots into the rhizosphere soils and had a great diversity of biological effects on associated weeds and microbes by soil interactions once released. However, allantoin levels in tissues or soils could not be distinguished between the allelopathic and non-allelopathic rice varieties. Field experiments showed that levels of allantoin released from rice varieties varied with their growth stages and reached the maximal levels at the stem elongation or panicle initiation to booting stages and then decreased dramatically. Allantoin could significantly stimulate the germination and growth of Echinochloa crus-galli and populations of soil bacteria and actinomycetes at selected test concentrations (30-500 mu g/g), but had no effect on soil fungi. The half-life (t (1/2) ) of allantoin in autoclaved soil (20.2 +/- 2.5 h, r(2) =0.95) was almost three-times longer than in non-autoclaved soil (7.3 +/- 1.9 h, r(2) =0.92), indicating that rapid biodegradation or transformation of allantoin occurs in paddy soil. The results suggest that not only may allantoin play a role in the transport and storage of nitrogen in rice tissues but it may also participate in species interactions between rice and other organisms in paddy soil.
学科主题	Agronomy ; Plant Sciences ; Soil Science
语种	英语
WOS记录号	WOS:000247971600004
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/54649]
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	Wang, P,Kong, CH,Hu, F,et al. Allantoin involved in species interactions with rice and other organisms in paddy soil[J]. PLANT AND SOIL,2007,296(1-2):43-51.
APA	Wang, P,Kong, CH,Hu, F,Xu, XH,&Kong, CH, Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China.(2007).Allantoin involved in species interactions with rice and other organisms in paddy soil.PLANT AND SOIL,296(1-2),43-51.
MLA	Wang, P,et al."Allantoin involved in species interactions with rice and other organisms in paddy soil".PLANT AND SOIL 296.1-2(2007):43-51.