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题名: Comprehensive investigation of tobacco leaves during natural early senescence via multi-platform metabolomics analyses
作者: Li, Lili1, 2;  Zhao, Jieyu1, 2;  Zhao, Yanni1, 2;  Lu, Xin1, 2;  Zhou, Zhihui1, 2;  Zhao, Chunxia1, 2;  Xu, Guowang1, 2
刊名: SCIENTIFIC REPORTS
发表日期: 2016-11-29
DOI: 10.1038/srep37976
卷: 6
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Multidisciplinary Sciences
英文摘要: Senescence is the final stage of leaf growth and development. Many different physiological activities occur during this process. A comprehensive metabolomics analysis of tobacco middle leaves at 5 different developmental stages was implemented through multi-platform methods based on liquid chromatography, capillary electrophoresis and gas chromatography coupled with mass spectrometry. In total, 412 metabolites were identified, including pigments, sterols, lipids, amino acids, polyamines, sugars and secondary metabolites. Dramatic metabolic changes were observed. Firstly, membrane degradation and chlorophyll down-regulation occurred after the 50% flower bud stage. Levels of major membrane lipids decreased, including those of the glycolipids in chloroplast thylakoids and phospholipids in membrane envelopes. Clear decreases in free sterols and acylated sterol glucosides were detected along with the accumulation of sterol esters. The accumulation of alkaloids was found. The amino acid levels were significantly decreased, particularly those of N-rich amino acids (glutamine and asparagine), thus reflecting N translocation. Subsequently, the antioxidant system was activated. Sugar alcohols and polyphenols accumulated when the lower leaves turned yellow. These results comprehensively revealed the metabolic changes that occur during tobacco leaf development and senescence under natural conditions.
关键词[WOS]: LEAF SENESCENCE ;  NICOTIANA-TABACUM ;  MASS-SPECTROMETRY ;  TRANSGENIC TOBACCO ;  ARABIDOPSIS ;  PLANTS ;  STRESS ;  BIOSYNTHESIS ;  METABOLISM ;  STEROLS
语种: 英语
WOS记录号: WOS:000388662600004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/150357
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, Key Lab Separat Sci Analyt Chem, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

Recommended Citation:
Li, Lili,Zhao, Jieyu,Zhao, Yanni,et al. Comprehensive investigation of tobacco leaves during natural early senescence via multi-platform metabolomics analyses[J]. SCIENTIFIC REPORTS,2016,6.
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