CmMYB8 encodes an R2R3 MYB transcription factor which represses lignin and flavonoid synthesis in chrysanthemum

Zhu, Li; Guan, Yunxiao; Zhang, Zhaohe; Song, Aiping; Chen, Sumei; Jiang, Jiafu; Chen, Fadi

doi:10.1016/j.plaphy.2020.02.010

Cited by 46 publications

(22 citation statements)

References 66 publications

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“…Karpinska et al (2004) found that reducing the expression of PttMYB21a in poplar would lead to the increase of CCoAOMT transcriptional abundance and lignin content, suggesting that this TF might be a transcriptional inhibitor [110]. We also noted that other MYB TFs from Chrysanthemum morifolium (CmMYB1 and CmMYB8) [56,111], Leucaena leucocephala (LlMYB1) [55], Panicum virgatum (PvMYB4a) [54], Eucalyptus gunnii (EgMYB1) [112], Musa nana (MusaMYB31) [113], and Z. mays (ZmMYB31 and ZmMYB42) [51,52] can inhibit lignin synthesis.…”

Section: The Role Of Myb Tfs In the Biosynthesis Of Lignins Secondarymentioning

confidence: 62%

MYB Transcription Factors as Regulators of Secondary Metabolism in Plants

Cao

et al. 2020

Biology

158

103

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MYB transcription factors (TFs), as one of the largest gene families in plants, play important roles in multiple biological processes, such as plant growth and development, cell morphology and pattern building, physiological activity metabolism, primary and secondary metabolic reactions, and responses to environmental stresses. The function of MYB TFs in crops has been widely studied, but few studies have been done on medicinal plants. In this review, we summarized the MYB TFs that play important roles in secondary metabolism and emphasized the possible mechanisms underlying how MYB TFs are regulated at the protein, posttranscriptional, and transcriptional levels, as well as how they regulate the downstream target gene networks related to secondary metabolism in plants, especially in medicinal plants.

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Section: The Role Of Myb Tfs In the Biosynthesis Of Lignins Secondarymentioning

confidence: 62%

MYB Transcription Factors as Regulators of Secondary Metabolism in Plants

Cao

et al. 2020

Biology

158

103

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“…The MYB superfamily is grouped into four subfamilies: 1R-MYB (MYB-related and R3-MYB), R2R3-MYB, 3R-MYB (R1R2R3-MYB), and 4RMYB. R2R3-MYB is the largest subfamily, with some members regulating plant growth and developmental [11], primary and secondary metabolism [12][13][14][15][16][17], response to various biotic and abiotic stresses [18][19][20][21], hormone synthesis, and signal transduction [22]. In recent years, more studies focused on the R2R3-MYB TFs regulating carotenoid metabolism.…”

Section: Introductionmentioning

confidence: 99%

Genome-Wide Comparative Analysis of the R2R3-MYB Gene Family in Five Solanaceae Species and Identification of Members Regulating Carotenoid Biosynthesis in Wolfberry

Yin

Guo

Shi

et al. 2022

IJMS

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The R2R3-MYB is a large gene family involved in various plant functions, including carotenoid biosynthesis. However, this gene family lacks a comprehensive analysis in wolfberry (Lycium barbarum L.) and other Solanaceae species. The recent sequencing of the wolfberry genome provides an opportunity for investigating the organization and evolutionary characteristics of R2R3-MYB genes in wolfberry and other Solanaceae species. A total of 610 R2R3-MYB genes were identified in five Solanaceae species, including 137 in wolfberry. The LbaR2R3-MYB genes were grouped into 31 subgroups based on phylogenetic analysis, conserved gene structures, and motif composition. Five groups only of Solanaceae R2R3-MYB genes were functionally divergent during evolution. Dispersed and whole duplication events are critical for expanding the R2R3-MYB gene family. There were 287 orthologous gene pairs between wolfberry and the other four selected Solanaceae species. RNA-seq analysis identified the expression level of LbaR2R3-MYB differential gene expression (DEGs) and carotenoid biosynthesis genes (CBGs) in fruit development stages. The highly expressed LbaR2R3-MYB genes are co-expressed with CBGs during fruit development. A quantitative Real-Time (qRT)-PCR verified seven selected candidate genes. Thus, Lba11g0183 and Lba02g01219 are candidate genes regulating carotenoid biosynthesis in wolfberry. This study elucidates the evolution and function of R2R3-MYB genes in wolfberry and the four Solanaceae species.

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“…MYB transcription factors have been classified into mainly two groups like activators or repressors (Ma & Constabel, 2019), contributing to better elucidation the roles of MYB transcription factors in maintaining complementary homeostasis between PA and lignin biosynthesis under abiotic stress. However, the MYB transcription factors in several plant species such as a hybrid poplar (Kim et al ., 2021), chrysanthemum (Zhu et al ., 2020), and rice (Cai et al ., 2020) made exceptions; it was reported that overexpression of the MYB transcription factors such as poplar PtrMYB120 and chrysanthemum CmMYB8 simultaneously promoted or inhibited both PA and lignin biosynthesis which are generally known as mutually competitive and antagonistic. Therefore, it seems clear that there exists room to fine‐tune two complementary branches of PA and lignin biosynthesis.…”

Section: Discussionmentioning

confidence: 99%

PuC3H35 confers drought tolerance by enhancing lignin and proanthocyanidin biosynthesis in the roots of Populus ussuriensis

Yang

Pak

et al. 2021

New Phytologist

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Since the roots are the very organ where plants first sense and respond drought stress, it is of great importance to better understand root responses to drought. Yet the underlying molecular mechanisms governing root responses to drought stress have been poorly understood.Here, we identified and functionally characterized a CCCH type transcription factor, PuC3H35, and its targets, anthocyanin reductase (PuANR) and early Arabidopsis aluminum induced1 (PuEARLI1), which are involved in mediating proanthocyanidin (PA) and lignin biosynthesis in response to drought stress in Populus ussuriensis root.PuC3H35 was root-specifically induced upon drought stress. Overexpressing PuC3H35 promoted PA and lignin biosynthesis and vascular tissue development, resulting in enhanced tolerance to drought stress by the means of anti-oxidation and mechanical supporting. We further demonstrated that PuC3H35 directly bound to the promoters of PuANR and PuEARLI1 and overexpressing PuANR or PuEARLI1 increased root PA or lignin levels, respectively, under drought stress.Taken together, these results revealed a novel regulatory pathway for drought tolerance, in which PuC3H35 mediated PA and lignin biosynthesis by collaboratively regulating 'PuC3H35-PuANR-PA' and 'PuC3H35-PuEARLI1-PuCCRs-lignin' modules in poplar roots.

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CmMYB8 encodes an R2R3 MYB transcription factor which represses lignin and flavonoid synthesis in chrysanthemum

Cited by 46 publications

References 66 publications

MYB Transcription Factors as Regulators of Secondary Metabolism in Plants

MYB Transcription Factors as Regulators of Secondary Metabolism in Plants

Genome-Wide Comparative Analysis of the R2R3-MYB Gene Family in Five Solanaceae Species and Identification of Members Regulating Carotenoid Biosynthesis in Wolfberry

PuC3H35 confers drought tolerance by enhancing lignin and proanthocyanidin biosynthesis in the roots of Populus ussuriensis

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