A bHLH transcription factor TsMYC2 is associated with the blue grain character in triticale (Triticum × Secale)

Zong, Yuan; Li, Guomin; Xi, Xingyuan; Sun, Xuemei; Li, Shiming; Cao, Dong; Zhang, Huaigang; Liu, Baolong

doi:10.1007/s00299-019-02449-3

Cited by 17 publications

(17 citation statements)

References 40 publications

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“…The ectopic overexpression of apple MdMYC2 also significantly upregulated the transcriptional expression of these structural genes in transgenic Arabidopsis lines (An et al, 2016). Recent studies have shown that both triticale (Triticum × Secale) TsMYC2 and wheat (Triticum aestivum) TaMYC1 can regulate anthocyanin biosynthesis and control the grain properties (Zong et al, 2019). On the other hand, several bHLHs could negatively regulate flavonoid synthesis.…”

Section: Bhlhs Regulate Plant Flavonoids Synthesis In Response To Abiotic Stressmentioning

confidence: 99%

Regulatory Mechanisms of bHLH Transcription Factors in Plant Adaptive Responses to Various Abiotic Stresses

Qian

Zhang

et al. 2021

Front. Plant Sci.

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Basic helix-loop-helix proteins (bHLHs) comprise one of the largest families of transcription factors in plants. They have been shown to be involved in responses to various abiotic stresses, such as drought, salinity, chilling, heavy metal toxicity, iron deficiency, and osmotic damages. By specifically binding to cis-elements in the promoter region of stress related genes, bHLHs can regulate their transcriptional expression, thereby regulating the plant’s adaptive responses. This review focuses on the structural characteristics of bHLHs, the regulatory mechanism of how bHLHs are involved transcriptional activation, and the mechanism of how bHLHs regulate the transcription of target genes under various stresses. Finally, as increasing research demonstrates that flavonoids are usually induced under fluctuating environments, the latest research progress and future research prospects are described on the mechanisms of how flavonoid biosynthesis is regulated by bHLHs in the regulation of the plant’s responses to abiotic stresses.

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Section: Bhlhs Regulate Plant Flavonoids Synthesis In Response To Abiotic Stressmentioning

confidence: 99%

Regulatory Mechanisms of bHLH Transcription Factors in Plant Adaptive Responses to Various Abiotic Stresses

Qian

Zhang

et al. 2021

Front. Plant Sci.

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“…87 A study by Feduraev et al 88 confirmed that phenylalanine and tyrosine are exogenous precursors that could promote the synthesis and accumulation of phenolic compounds in wheat by enhancing the expression of several genes involved in phenolic biosynthesis. It is evident that enzymes including coumaric [89][90][91][92] The phenylpropanoid biosynthetic pathway has been widely studied in specific crop species. 93,94 Moreover, the pathway of flavonoid biosynthesis in a model plant Arabidopsis thaliana and some crops, such as maize, rice, and bean, have been reviewed by Tohge et al 95 In the review by Khlestkina et al, 96 the genes responsible for wheat coloration trait, as well as the structural and regulatory genes involved in wheat flavonoid biosynthesis, including Pal, Chs, Chi, F3h, F3'5'h, Dfr, and Myb, has been listed.…”

Section: Biosynthetic Pathway Of Phenolicsmentioning

confidence: 99%

Wheat grain phenolics: a review on composition, bioactivity, and influencing factors

Wang

Feng

et al. 2021

J Sci Food Agric

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Wheat (Triticum aestivum L.) is a widely cultivated crop and one of the most commonly consumed food grains in the world. It possesses several nutritional elements. Increasing attention to wheat grain phenolics bioactivity is due to the increasing demand for foods with natural antioxidants. To provide a comprehensive understanding of phenolics in wheat grain, this review first summarizes the phenolics' form and distribution and the phenolic components identified in wheat grain. In particular, the biosynthesis path for phenolics is discussed, identifying some candidate genes involved in the biosynthesis of phenolic acids and flavonoids. After discussing the methods for determining antioxidant activity, the effect of genotypes, environmental conditions, and cultivation systems on grain phenolic component content are explored. Finally, the bioavailability of phenolics under different food processing method are reported and discussed. Future research is recommended to increase wheat grain phenolic content by genetic engineering, and to improve its bioavailability through proper food processing.

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“…bessarabicum (Shen et al, 2013). In addition, the HvMYC2 gene was identified to be involved in anthocyanin synthesis in the barley aleurone layer (Strygina et al, 2017), and TsMYC2 has been correlated with the blue grain trait in triticale (Zong et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

TbMYC4A Is a Candidate Gene Controlling the Blue Aleurone Trait in a Wheat-Triticum boeoticum Substitution Line

et al. 2021

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Triticum boeoticum Boiss (AbAb, 2n = 2x = 14) is one of the sources of the blue grain trait controlled by blue aleurone layer 2 (Ba2). However, the underlying genes have not been cloned. In this study, a transcriptomic comparison between a blue-grained wheat-T. boeoticum substitution line and its wheat parent identified 41 unigenes related to anthocyanin biosynthesis and 29 unigenes related to transport. The bHLH transcription factor gene TbMYC4A showed a higher expression level in the blue-grained substitution line. TbMYC4A contained the three characteristic bHLH transcription factor domains (bHLH-MYC_N, HLH and ACT-like) and clustered with genes identified from other wheat lines with the blue grain trait derived from other Triticeae species. TbMYC4A overexpression confirmed that it was a functional bHLH transcription factor. The analysis of a TbMYC4A-specific marker showed that the gene was also present in T. boeoticum and T. monococcum with blue aleurone but absent in other Triticeae materials with white aleurone. These results indicate that TbMYC4A is a candidate gene of Ba2 controlling the blue aleurone trait. The isolation of TbMYC4A is helpful for further clarifying the genetic mechanism of the blue aleurone trait and is of great significance for breeding blue-grained wheat varieties.

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A bHLH transcription factor TsMYC2 is associated with the blue grain character in triticale (Triticum × Secale)

Cited by 17 publications

References 40 publications

Regulatory Mechanisms of bHLH Transcription Factors in Plant Adaptive Responses to Various Abiotic Stresses

Regulatory Mechanisms of bHLH Transcription Factors in Plant Adaptive Responses to Various Abiotic Stresses

Wheat grain phenolics: a review on composition, bioactivity, and influencing factors

TbMYC4A Is a Candidate Gene Controlling the Blue Aleurone Trait in a Wheat-Triticum boeoticum Substitution Line

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