title: Expression of flavonoid biosynthesis genes and accumulation of flavonoid in wheat leaves in response to drought stress.
abstract: Flavonoids are the low molecular weight polyphenolic secondary metabolic compounds, and have various functions in growth, development, reproduction, and stress defense. However, little is known about the roles of the key enzymes in the flavonoids biosynthesis pathway in response to drought stress in winter wheat. Here, we investigated the expression pattern of flavonoids biosynthesis genes and accumulation of flavonoids in wheat leaves under drought stress. Quantitative real-time PCR analysis showed that there were a rapid increase in expression levels of TaCHS, TaCHI, TaF3H, TaFNS, TaFLS, TaDFR, and TaANS under drought stress in two wheat cultivars Aikang 58 (AK) and Chinese Spring (CS). The cultivar CS exhibited higher genes expression levels of TaCHS, TaCHI, TaF3H, TaFLS, TaDFR, and TaANS, and the cultivar AK showed a higher expression level of TaFNS gene during drought treatment. The increase rates of genes expression were superior in AK compared to CS. Total phenolics content, total flavonoids content, anthocyanin content, and schaftoside content in wheat leaves were enhanced during drought treatment and cultivar CS had a relative higher accumulation. These results suggest that the flavonoids pathway genes expression and accumulation of flavonoids compounds may be closely related to drought tolerant in wheat. Further, flavonoids response mechanism may be different between wheat cultivars.
authors.affiliation: National Engineering Research Center for Wheat, Henan Agricultural University, No. 62 Nongye Road, Zhengzhou City 450002, Henan Province, China.
authors.forename: Dongyun
authors.initials: D
authors.lastname: Ma
authors.affiliation: National Engineering Research Center for Wheat, Henan Agricultural University, No. 62 Nongye Road, Zhengzhou City 450002, Henan Province, China.
authors.forename: Dexiang
authors.initials: D
authors.lastname: Sun
authors.affiliation: National Engineering Research Center for Wheat, Henan Agricultural University, No. 62 Nongye Road, Zhengzhou City 450002, Henan Province, China.
authors.forename: Chenyang
authors.initials: C
authors.lastname: Wang
authors.affiliation: National Engineering Research Center for Wheat, Henan Agricultural University, No. 62 Nongye Road, Zhengzhou City 450002, Henan Province, China.
authors.forename: Yaoguang
authors.initials: Y
authors.lastname: Li
authors.affiliation: National Engineering Research Center for Wheat, Henan Agricultural University, No. 62 Nongye Road, Zhengzhou City 450002, Henan Province, China. Electronic address: tcguo88@163.com.
authors.forename: Tiancai
authors.initials: T
authors.lastname: Guo
mesh_terms: D055864:Droughts; D005419:Flavonoids / Q000096:biosynthesis*; D018506:Gene Expression Regulation, Plant; D018515:Plant Leaves / Q000378:metabolism* / Q000502:physiology; D014908:Triticum / Q000378:metabolism* / Q000502:physiology
chemical_list: D005419:Flavonoids
keywords: Drought; Flavonoids biosynthesis pathway; Gene expression; Wheat