Characterization of factors underlying the metabolic shifts in developing kernels of colored maize

Elucidation of the metabolic pathways determining pigmentation and their underlying regulatory mechanisms in maize kernels is of high importance in attempts to improve the nutritional composition of our food. In this study, we compared dynamics in the transcriptome and metabolome between colored SW9...

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Veröffentlicht in:Scientific reports 2016-10, Vol.6 (1), p.35479-35479, Article 35479
Hauptverfasser: Hu, Chaoyang, Li, Quanlin, Shen, Xuefang, Quan, Sheng, Lin, Hong, Duan, Lei, Wang, Yifa, Luo, Qian, Qu, Guorun, Han, Qing, Lu, Yuan, Zhang, Dabing, Yuan, Zheng, Shi, Jianxin
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container_title Scientific reports
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creator Hu, Chaoyang
Li, Quanlin
Shen, Xuefang
Quan, Sheng
Lin, Hong
Duan, Lei
Wang, Yifa
Luo, Qian
Qu, Guorun
Han, Qing
Lu, Yuan
Zhang, Dabing
Yuan, Zheng
Shi, Jianxin
description Elucidation of the metabolic pathways determining pigmentation and their underlying regulatory mechanisms in maize kernels is of high importance in attempts to improve the nutritional composition of our food. In this study, we compared dynamics in the transcriptome and metabolome between colored SW93 and white SW48 by integrating RNA-Seq and non-targeted metabolomics. Our data revealed that expression of enzyme coding genes and levels of primary metabolites decreased gradually from 11 to 21 DAP, corresponding well with the physiological change of developing maize kernels from differentiation through reserve accumulation to maturation, which was cultivar independent. A remarkable up-regulation of anthocyanin and phlobaphene pathway distinguished SW93 from SW48, in which anthocyanin regulating transcriptional factors ( R1 and C1 ), enzyme encoding genes involved in both pathways and corresponding metabolic intermediates were up-regulated concurrently in SW93 but not in SW48. The shift from the shikimate pathway of primary metabolism to the flavonoid pathway of secondary metabolism, however, appears to be under posttranscriptional regulation. This study revealed the link between primary metabolism and kernel coloration, which facilitate further study to explore fundamental questions regarding the evolution of seed metabolic capabilities as well as their potential applications in maize improvement regarding both staple and functional foods.
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In this study, we compared dynamics in the transcriptome and metabolome between colored SW93 and white SW48 by integrating RNA-Seq and non-targeted metabolomics. Our data revealed that expression of enzyme coding genes and levels of primary metabolites decreased gradually from 11 to 21 DAP, corresponding well with the physiological change of developing maize kernels from differentiation through reserve accumulation to maturation, which was cultivar independent. A remarkable up-regulation of anthocyanin and phlobaphene pathway distinguished SW93 from SW48, in which anthocyanin regulating transcriptional factors ( R1 and C1 ), enzyme encoding genes involved in both pathways and corresponding metabolic intermediates were up-regulated concurrently in SW93 but not in SW48. The shift from the shikimate pathway of primary metabolism to the flavonoid pathway of secondary metabolism, however, appears to be under posttranscriptional regulation. 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subjects 101/58
38/91
49/39
49/61
49/98
631/136/334/2244/1401
631/449/2667
Anthocyanins - genetics
Anthocyanins - metabolism
Coloration
Corn
Cultivars
Enzymes
Flavonoids - genetics
Flavonoids - metabolism
Food composition
Functional foods & nutraceuticals
Gene expression
Humanities and Social Sciences
Intermediates
Kernels
Metabolic pathways
Metabolism
Metabolites
Metabolomics
multidisciplinary
Pigmentation
Plant Proteins - genetics
Plant Proteins - metabolism
Post-transcription
Protein Processing, Post-Translational
Ribonucleic acid
RNA
Science
Seeds - growth & development
Seeds - metabolism
Transcription factors
Transcription Factors - genetics
Transcription Factors - metabolism
Zea mays - genetics
Zea mays - growth & development
Zea mays - metabolism
title Characterization of factors underlying the metabolic shifts in developing kernels of colored maize
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