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Allocate carbon for a reason: Priorities are reflected in the C-13/C-12 ratios of plant lipids synthesized via three independent biosynthetic pathways

文献类型：期刊论文

作者Zhou, Youping1,3,4,7; Stuart-Williams, Hilary2; Grice, Kliti3; Kayler, Zachary E.1; Zavadlav, Sasa5; Vogts, Angela8; Rommerskirchen, Florian9; Farquhar, Graham D.2; Gessler, Arthur1,6
刊名PHYTOCHEMISTRY
出版日期2015-03-01
卷号111页码:14-20
关键词Natural Abundance Carbon Isotopes Lipid Biosynthetic Pathways Isotope Effects Carbon Allocation Priority C-3 - C-4 Difference
ISSN号0031-9422
DOI10.1016/j.phytochem.2014.12.005
文献子类Review
英文摘要It has long been theorized that carbon allocation, in addition to the carbon source and to kinetic isotopic effects associated with a particular lipid biosynthetic pathway, plays an important role in shaping the carbon isotopic composition (C-13/C-12) of lipids (Park and Epstein, 1961). If the latter two factors are properly constrained, valuable information about carbon allocation during lipid biosynthesis can be obtained from carbon isotope measurements. Published work of Chikaraishi et al. (2004) showed that leaf lipids isotopic shifts from bulk leaf tissue Delta delta C-13(bk-lp) (defined as delta C-13(bulkleaftissue) - delta C-13(lipid)) are pathway dependent: the acetogenic (ACT) pathway synthesizing fatty lipids has the largest isotopic shift, the mevalonic acid (MVA) pathway synthesizing sterols the lowest and the phytol synthesizing 1-deoxy-o-xylulose 5-phosphate (DXP) pathway gives intermediate values. The differences in Delta delta C-13(bk-lp) between C-3 and C-4 plants Delta delta C-13(bk-lp,C4-C3) are also pathway-dependent: Delta delta C-13(bk-lp,C4-C3)ACT > Delta delta C-13(bk-lp,C4-C3)DXP > Delta delta C-13(bk-lp,C4-C3)MVA. These pathway-dependent differences have been interpreted as resulting from kinetic isotopic effect differences of key but unspecified biochemical reactions involved in lipids biosynthesis between C-3 and C-4 plants. After quantitatively considering isotopic shifts caused by (dark) respiration, export-of-carbon (to sink tissues) and photorespiration, we propose that the pathway-specific differences Delta delta C-13(bk-lp),(C3-)into the ACT pathway and lowest into the MVA pathways (when flux is higher, isotopic shift relative to source is smaller). Highest carbon allocation to the ACT pathway appears to be tied to the most stringent role of waterloss-minimization by leaf waxes (composed mainly of fatty lipids) while the lowest carbon allocation to the MVA pathway can be largely explained by the fact that sterols act as regulatory hormones and membrane fluidity modulators in rather low concentrations. (C) 2014 Elsevier Ltd. All rights reserved.
WOS关键词ISOTOPE FRACTIONATION ; ORGANIC-MATTER ; FATTY-ACIDS ; C-4 PLANTS ; LEAVES ; C-13 ; CO2 ; C4 ; C3 ; DISCRIMINATION
WOS研究方向Biochemistry & Molecular Biology ; Plant Sciences
语种英语
WOS记录号WOS:000350527400002
出版者PERGAMON-ELSEVIER SCIENCE LTD
源URL[http://ir.ieecas.cn/handle/361006/15629]  
专题地球环境研究所_黄土与第四纪地质国家重点实验室（2010~）
通讯作者Zhou, Youping
作者单位1.ZALF, Inst Landscape Biogeochem, Muncheberg, Germany
2.Australian Natl Univ, RSB, Canberra, ACT, Australia
3.Curtin Univ, Dept Chem, Perth, WA 6845, Australia
4.Chinese Acad Sci, SKLLQG, Xian, Peoples R China
5.Slovenian Forestry Inst, Ljubljana, Slovenia
6.Swiss Fed Inst WSL, Birmensdorf, Switzerland
7.Leibniz Inst Freshwater Ecol & Inland Fisheries, Berlin, Germany
8.Leibniz Inst Ostseeforsch, Rostock, Germany
9.Inst Futtermittel, LUFA Nord West, Oldenburg, Germany
推荐引用方式
GB/T 7714		 Zhou, Youping,Stuart-Williams, Hilary,Grice, Kliti,et al. Allocate carbon for a reason: Priorities are reflected in the C-13/C-12 ratios of plant lipids synthesized via three independent biosynthetic pathways[J]. PHYTOCHEMISTRY,2015,111:14-20.
APA Zhou, Youping.,Stuart-Williams, Hilary.,Grice, Kliti.,Kayler, Zachary E..,Zavadlav, Sasa.,...&Gessler, Arthur.(2015).Allocate carbon for a reason: Priorities are reflected in the C-13/C-12 ratios of plant lipids synthesized via three independent biosynthetic pathways.PHYTOCHEMISTRY,111,14-20.
MLA Zhou, Youping,et al."Allocate carbon for a reason: Priorities are reflected in the C-13/C-12 ratios of plant lipids synthesized via three independent biosynthetic pathways".PHYTOCHEMISTRY 111(2015):14-20.

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来源：地球环境研究所

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