Novel Position-Specific O-18/O-16 Measurement of Carbohydrates. I. O-3 of Glucose and Confirmation of O-18/O-16 Heterogeneity at Natural Abundance Levels in Glucose from Starch in a C-4 Plant
文献类型:期刊论文
作者 | Wang, Ying2,3; Lu, Fengyan4; Zhao, Yu2,3; Wang, Bo2,3; Zhu, Zhenyu2,3; Zhou, Youping2,3; Hocart, Charles H.5; Yin, Xijie1; Su, Jing1; Ma, Ran2,3 |
刊名 | ANALYTICAL CHEMISTRY |
出版日期 | 2018-09-04 |
卷号 | 90期号:17页码:10293-10301 |
DOI | 10.1021/acs.analchem.8b02022 |
文献子类 | Article |
英文摘要 | The O-18/O-16 ratio at both molecular and positional levels in the carbohydrates of higher plants is a reliable proxy for the plant growth environment, and a potential indicator of the plant photosynthetic carbon assimilation mode, and its physiological, biochemical and metabolic status. The lack of exploitable nuclear resonance in O-18 and O-16 and the extremely low O-17 abundance make the NMR-based PSIA (position-specific isotopic analysis) a significant challenge. In this Article, an alternative three-step wet chemistry based method for accessing the O-18/O-16 of glucose O-3 is presented. The O atoms (OH groups) at positions 1, 2, 5, and 6 were first protected by acetonation (converting glucose to 1,2;5,6-di-O-isopropylidene-glucofuranose). The protected glucose was then esterified at O-3 by thionoformylation. Subsequent Barton-McCombie deoxygenation quantitatively removed the O-3 from the protected sugar. Mass balance was then applied to calculate the O-18/O-16 of O-3 using the isotopic values of the protected sugar before and after the deoxygenation step. The method is innovative in that (i) isolation and purification of individual compounds for O-18 by EA/Pyrolysis/IRMS analysis is unnecessary as the reaction mixture can be analyzed on a GC/Pyrolysis/IRMS; (ii) sample quantity is dramatically reduced; and (iii) the approach to access the O-3 isotopic signal can be easily expanded to other positions within glucose and other sugars. It was shown that O-3 is enriched by 12 mUr relative to the molecular average (O-2-O-6) for a glucose of C-4 photosynthetic origin. We highlighted the potential applications of the intramolecular O isotopic heterogeneity of glucose this method revealed. |
WOS关键词 | CONTAINING CHEMICAL LINKAGES ; CARBON-ISOTOPE COMPOSITION ; CELLULOSE SYNTHESIS ; MASS-SPECTROMETRY ; ORGANIC-MATTER ; LEAF WATER ; OXYGEN ; DELTA-O-18 ; SUGARS ; O-18 |
WOS研究方向 | Chemistry |
语种 | 英语 |
WOS记录号 | WOS:000444060600031 |
源URL | [http://ir.ieecas.cn/handle/361006/5351] |
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~) |
作者单位 | 1.SOA Third Inst Oceanog, Xiamen 361005, Peoples R China 2.Shaanxi Univ Sci & Technol, Sch Chem & Chem Engn, Isotop Chem Biol, Xian 710021, Shaanxi, Peoples R China 3.Shaanxi Univ Sci & Technol, Sch Chem & Chem Engn, Shaanxi Key Lab Chem Addit Ind, Xian 710021, Shaanxi, Peoples R China 4.Chinese Acad Sci, Inst Earth Environm, Xian 710061, Shaanxi, Peoples R China 5.Australian Natl Univ, Res Sch Biol, Acton, ACT 2601, Australia |
推荐引用方式 GB/T 7714 | Wang, Ying,Lu, Fengyan,Zhao, Yu,et al. Novel Position-Specific O-18/O-16 Measurement of Carbohydrates. I. O-3 of Glucose and Confirmation of O-18/O-16 Heterogeneity at Natural Abundance Levels in Glucose from Starch in a C-4 Plant[J]. ANALYTICAL CHEMISTRY,2018,90(17):10293-10301. |
APA | Wang, Ying.,Lu, Fengyan.,Zhao, Yu.,Wang, Bo.,Zhu, Zhenyu.,...&Ma, Ran.(2018).Novel Position-Specific O-18/O-16 Measurement of Carbohydrates. I. O-3 of Glucose and Confirmation of O-18/O-16 Heterogeneity at Natural Abundance Levels in Glucose from Starch in a C-4 Plant.ANALYTICAL CHEMISTRY,90(17),10293-10301. |
MLA | Wang, Ying,et al."Novel Position-Specific O-18/O-16 Measurement of Carbohydrates. I. O-3 of Glucose and Confirmation of O-18/O-16 Heterogeneity at Natural Abundance Levels in Glucose from Starch in a C-4 Plant".ANALYTICAL CHEMISTRY 90.17(2018):10293-10301. |
入库方式: OAI收割
来源:地球环境研究所
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