Identification of the gene network modules highly associated with the synthesis of phenolics compounds in barley by transcriptome and metabolome analysis

Zhigang Han; Muhammad Ahsan; Muhammad Faheem Adil; Xiaohui Chen; Muhammad Mudassir Nazir; Imran Haider Shamsi; Fanrong Zeng; Guoping Zhang

doi:10.1016/j.foodchem.2020.126862

Identification of the gene network modules highly associated with the synthesis of phenolics compounds in barley by transcriptome and metabolome analysis

Food Chem. 2020 Apr 18:323:126862. doi: 10.1016/j.foodchem.2020.126862. Online ahead of print.

Authors

Zhigang Han¹, Muhammad Ahsan², Muhammad Faheem Adil³, Xiaohui Chen⁴, Muhammad Mudassir Nazir⁵, Imran Haider Shamsi⁶, Fanrong Zeng⁷, Guoping Zhang⁸

Affiliations

¹ Department of Agronomy, Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou 310058, China. Electronic address: [email protected].
² Department of Agronomy, Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou 310058, China. Electronic address: [email protected].
³ Department of Agronomy, Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou 310058, China. Electronic address: [email protected].
⁴ Department of Agronomy, Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou 310058, China. Electronic address: [email protected].
⁵ Department of Agronomy, Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou 310058, China. Electronic address: [email protected].
⁶ Department of Agronomy, Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou 310058, China. Electronic address: [email protected].
⁷ Department of Agronomy, Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou 310058, China. Electronic address: [email protected].
⁸ Department of Agronomy, Zhejiang Key Laboratory of Crop Germplasm, Zhejiang University, Hangzhou 310058, China. Electronic address: [email protected].

PMID: 32334297
DOI: 10.1016/j.foodchem.2020.126862

Abstract

Phenolic compounds in barley grains have an important influence on beer flavor and stability. Drought condition enhances the content of phenolics in barley grains, leading to reduced malt quality. In this study, two barley genotypes, XZ20 and XZ25 with different total phenolics content were used to investigate the effect of drought on phenolic compounds during grain developing stage. Totally, 118 phenolic metabolites were affected by drought stress. A weighted gene co-expression network analysis (WGCNA) of 17,424 highly expressed genes uncovered black (two hub genes belonged to UGT family) and turquoise modules (three hub genes belonged to phenolics pathway) that are significantly associated with the variation of phenolics. All these results reveal the changes of phenolic metabolites during grain development and provide a new insight into the regulation network of phenolic compounds under drought stress.

Keywords: Barley (Hordeum vulgare L.); Drought stress; Metabolome; Phenolic compounds; Transcriptome.