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Int. J. Mol. Sci. 2018, 19(1), 135; doi:10.3390/ijms19010135

Identification of Conserved and Diverse Metabolic Shift of the Stylar, Intermediate and Peduncular Segments of Cucumber Fruit during Development

1
Lab (Hangzhou) for Risk Assessment of Agricultural Products of Ministry of Agriculture, Institute of Quality and Standard for Agricultural Products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
2
Key Laboratory of Information Traceability for Agricultural Products of Ministry of Agriculture of China, Institute of Digital Agriculture, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
3
Joint International Research Laboratory of Metabolic & Developmental Sciences, SJTU-University of Adelaide Joint Centre for Agriculture and Health, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
4
Paojiang Jin Bo Family Farm, Shaoxing 312000, China
*
Author to whom correspondence should be addressed.
Received: 29 November 2017 / Revised: 22 December 2017 / Accepted: 24 December 2017 / Published: 3 January 2018
(This article belongs to the Special Issue Metabolomics in the Plant Sciences 2017)
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Abstract

Cucumber (Cucumis sativus L.) is one of the most important vegetables and contains a high content of nutritionally beneficial metabolites. However, little is known about the metabolic variations among different parts of cucumber fruit and their kinetics during growth. In this study, the dynamic metabolic profiles in the stylar end, the intermediate segment and the peduncular end of cucumber fruit during the development were investigated by employing a non-targeted metabolomics approach, where 238 metabolites were identified. Statistical analyses revealed that both development time and tissue type influenced metabolic changes, while development time seemed to exert more effects than tissue type on the cucumber fruit metabolome. The levels of the most of the detected metabolites decreased gradually, while those of some amino acids, carbohydrates and flavonoids increased across development. The metabolomes of the stylar end and the intermediate segment were similar, although all three parts of the cucumber fruit were separated from each other in orthogonal partial least squares projection to latent structures-discriminant analysis (OPLS-DA) plots. Metabolites association analysis revealed that sn-1 and sn-2 lysophospholipids are synthesized via independent pathways in cucumber fruit. In sum, this study demonstrated both conserved and diverse metabolic kinetics of three parts of cucumber fruit, which will facilitate further study of the regulation of cucumber fruit development as well as their potential applications in nutritious quality improvement of cucumber fruit. View Full-Text
Keywords: metabolite profiling; amino acids; lipids; flavonoids; carbohydrates; PCA; OPLS-DA; correlation analysis metabolite profiling; amino acids; lipids; flavonoids; carbohydrates; PCA; OPLS-DA; correlation analysis
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Hu, C.; Zhao, H.; Wang, W.; Xu, M.; Shi, J.; Nie, X.; Yang, G. Identification of Conserved and Diverse Metabolic Shift of the Stylar, Intermediate and Peduncular Segments of Cucumber Fruit during Development. Int. J. Mol. Sci. 2018, 19, 135.

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