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Association of enriched metabolites profile with the corresponding volatile characteristics induced by rice yellowing process

journal contribution
posted on 12.10.2021, 04:48 by Jinguang Liu, Yuqian Liu, Meng Jia, Xuedong Kang, Saimin Wang, Hui Sun, Meng Liu, Anqi Wang, Padraig Strappe, Zhongkai Zhou
Change in metabolites and volatiles during yellowing process in six rice cultivars was analyzed. Based on the yellowness, the study indicated Japonica was more prone to yellowing than Indica rice. Metabonomics analysis showed most differential metabolites were up-regulated, in which pathways of flavone and flavonol biosynthesis were significantly enriched following the yellowing process. Meanwhile, 54 differential metabolites were overlapped in six comparative groups, which is characterized by commonly-shared metabolic regulation pathway in each rice. Phenylalanine content was increased, followed by the enhanced phenylpropanoids formation, showing transformation between primary and secondary metabolites during yellowing process. Furthermore, 43 volatile compounds were identified, and the yellowed rice had more volatiles, including ketones, alcohols, esters and hydrocarbons, suggesting a positive correlation with the yellowing. Compounds 6-methyl-5-hepten-2-one and 6,10,14-trimethyl-2-pentadecanone were increased steadily during yellowing process, which may be applied for monitoring rice yellowing progress. This investigation provides further insight for revealing rice yellowing mechanism.

Funding

Category 3 - Industry and Other Research Income

History

Volume

349

Start Page

1

End Page

19

Number of Pages

19

eISSN

1873-7072

ISSN

0308-8146

Location

England

Publisher

Elsevier BV

Language

eng

Peer Reviewed

Yes

Open Access

No

Acceptance Date

19/01/2021

Medium

Print-Electronic

Journal

Food Chemistry

Article Number

129173