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DOI	10.1126/science.1084269
	Rapid turnover of hyphae of mycorrhizal fungi determined by AMS microanalysis of 14C
	Staddon P.L.; Ramsey C.B.; Ostle N.; Ineson P.; Fitter A.H.
发表日期	2003
ISSN	0036-8075
起始页码	1138
结束页码	1140
卷号	300 期号:5622
英文摘要	Processes in the soil remain among the least well-characterized components of the carbon cycle. Arbuscular mycorrhizal (AM) fungi are ubiquitous root symbionts in many terrestrial ecosystems and account for a large fraction of photosynthate in a wide range of ecosystems; they therefore play a key role in the terrestrial carbon cycle. A large part of the fungal mycelium is outside the root (the extraradical mycelium, ERM) and, because of the dispersed growth pattern and the small diameter of the hyphae (<5 micrometers), exceptionally difficult to study quantitatively. Critically, the longevity of these fine hyphae has never been measured, although it is assumed to be short. To quantify carbon turnover in these hyphae, we exposed mycorrhizal plants to fossil ("carbon14-dead") carbon dioxide and collected samples of ERM hyphae (up to 116 micrograms) over the following 29 days. Analyses of their carbon-14 content by accelerator mass spectrometry (AMS) showed that most ERM hyphae of AM fungi live, on average, 5 to 6 days. This high turnover rate reveals a large and rapid mycorrhizal pathway of carbon in the soil carbon cycle.
英文关键词	Carbon dioxide; Ecosystems; Mass spectrometry; Plants (botany); Soils; Soil carbon cycle; Fungi; carbon 14; carbon dioxide; carbon cycle; fungus; mycorrhiza; soil carbon; article; carbon cycle; ecosystem; fossil; fungus hyphae; isotope labeling; longevity; mass spectrometry; mycelium; mycorrhiza; nonhuman; photosynthesis; priority journal; soil; symbiosis; Carbon; Carbon Radioisotopes; Hyphae; Mycorrhizae; Plant Roots; Plantago; Soil Microbiology; Zygomycota; cellular organisms; Fungi
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/245586
作者单位	Department of Biology, University of York, Post Office Box 373, York YO10 5YW, United Kingdom; Radiocarbon Accelerator Unit, Res. Lab. for Archaeology of Art, University of Oxford, 6 Keble Road, Oxford OX1 3QJ, United Kingdom; Centre for Ecology and Hydrology, Merlewood Research Station, Grangeover-Sands, Cumbria LA11 6JU, United Kingdom; Risø National Laboratory, Plant Research Department, Building 313, Postbox 49, Roskilde DK-4000, Denmark
推荐引用方式 GB/T 7714	Staddon P.L.,Ramsey C.B.,Ostle N.,et al. Rapid turnover of hyphae of mycorrhizal fungi determined by AMS microanalysis of 14C[J],2003,300(5622).
APA	Staddon P.L.,Ramsey C.B.,Ostle N.,Ineson P.,&Fitter A.H..(2003).Rapid turnover of hyphae of mycorrhizal fungi determined by AMS microanalysis of 14C.Science,300(5622).
MLA	Staddon P.L.,et al."Rapid turnover of hyphae of mycorrhizal fungi determined by AMS microanalysis of 14C".Science 300.5622(2003).