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Metabolic profiling based on LC/MS to evaluate unintended effects of transgenic rice with cry1Ac and sck genes

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Abstract

As a primary characteristic of substantial equivalence, the evaluation of unintended effects of genetically modified plants has been evolving into an important field of research. In this study, a metabolic profiling method for rice seeds was developed using rapid resolution liquid chromatography/quadrupole time-of-flight mass spectrometry. The analytical properties of the method, including the linearity, reproducibility, intra-day precision and inter-day precision, were investigated and were found to be satisfactory. The method was then applied to investigate the differences between transgenic rice and its native counterparts, in addition to the differences found between native rice with different sowing dates or locations. Global metabolic phenotype differences were visualized, and metabolites from different discriminated groups were discovered using multivariate data analysis. The results indicated that environmental factors played a greater role than gene modification for most metabolites, including tryptophan, 9,10,13-trihydroxyoctadec-11-enoic acid, and lysophosphatidylethanolamine 16:0. The concentrations of phytosphingosine, palmitic acid, 5-hydroxy-2-octadenoic acid and three other unidentified metabolites varied slightly due to gene modification.

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Acknowledgments

This study has been supported by the National Basic Research Program of China (2007CB109201), National Grand Project of Science and Technology (2008ZX08012-002, 2011ZX08012-002), and the National Natural Science Foundation of China (No. 21075122).

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Authors and Affiliations

  1. CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China

    Yuwei Chang, Chunxia Zhao, Zeming Wu, Jia Zhou, Yanni Zhao, Xin Lu & Guowang Xu

  2. Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China

    Zhen Zhu

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  1. Yuwei Chang
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  2. Chunxia Zhao
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  3. Zhen Zhu
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  4. Zeming Wu
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  6. Yanni Zhao
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  7. Xin Lu
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  8. Guowang Xu
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Correspondence to Chunxia Zhao or Guowang Xu.

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Chang, Y., Zhao, C., Zhu, Z. et al. Metabolic profiling based on LC/MS to evaluate unintended effects of transgenic rice with cry1Ac and sck genes. Plant Mol Biol 78, 477–487 (2012). https://doi.org/10.1007/s11103-012-9876-3

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  • DOI: https://doi.org/10.1007/s11103-012-9876-3

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