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Identification of the R2R3-MYB Transcription Factor Family in Barley and Functional Verification of Hv2RMYB-48 under Low-Phosphorus Stress
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Changjie Wang1, 2, Xinyao Wang1, 2, Jiajia Chen1, 2, Na Zhao1, 2, Yongsheng Wang1, 2, Li Niu1, 2, Hong Zhang1, 2, Lirong Yao1, 2, Erjing Si1, 2, Ke Yang1, 2, Yaxiong Meng1, 2, Xiaole Ma1, 2, Huajun Wang1, 2, Juncheng Wang1, 2
Journal of Triticeae Crops | 2026, 46(8) : 1000 - 1013
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Journal of Triticeae Crops | 2026, 46(8): 1000-1013
• Genetics & Breeding •
Identification of the R2R3-MYB Transcription Factor Family in Barley and Functional Verification of Hv2RMYB-48 under Low-Phosphorus Stress
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Changjie Wang1, 2, Xinyao Wang1, 2, Jiajia Chen1, 2, Na Zhao1, 2, Yongsheng Wang1, 2, Li Niu1, 2, Hong Zhang1, 2, Lirong Yao1, 2, Erjing Si1, 2, Ke Yang1, 2, Yaxiong Meng1, 2, Xiaole Ma1, 2, Huajun Wang1, 2, Juncheng Wang1, 2
Affiliations
  • 1.College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China
  • 2.State Key Lab of Aridland Crop Science/Seed Industry Institute of Gansu Provincal University, Lanzhou, Gansu 730070, China
Published: 2026-08-15 doi: 10.7606/j.issn.1009-1041.2026.08.02
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The R2R3-MYB transcription factor family, the largest subfamily of MYB transcription factors, plays critical roles in various plant stress responses. However, its function under low-phosphate (P) stress remains poorly characterized. In this study, a total of 127 R2R3-MYB genes were identified in the barley MorexV3 genome using bioinformatic approaches and designated as Hv2RMYB-1 to Hv2RMYB-127. These genes were predominantly distributed on the 7 barley chromosomes and were found to harbor hormone-responsive cis-acting elements in their promoter regions. Physicochemical analysis revealed that most members encode acidic and unstable proteins. Phylogenetic and collinearity analyses classified the barley R2R3-MYB family into five distinct clades, including 16 pairs of tandemly duplicated genes. Based on transcriptomic data (RNA-Seq) and quantitative real-time PCR (qRT-PCR), 10 barley R2R3-MYB genes showed differential expression under low-Phosphorus stress, among which Hv2RMYB-48 was notably upregulated. Further investigation confirmed that Hv2RMYB-48 localizes to the nucleus and can bind to the MYB-ABRE-MYBcis-element.

Barley  /  R2R3-MYB transcription factor  /  Low phosphorus stress  /  Bioinformatics  /  Yeast one-hybrid analysis
Changjie Wang, Xinyao Wang, Jiajia Chen, Na Zhao, Yongsheng Wang, Li Niu, Hong Zhang, Lirong Yao, Erjing Si, Ke Yang, Yaxiong Meng, Xiaole Ma, Huajun Wang, Juncheng Wang. Identification of the R2R3-MYB Transcription Factor Family in Barley and Functional Verification of Hv2RMYB-48 under Low-Phosphorus Stress[J]. Journal of Triticeae Crops, 2026 , 46 (8) : 1000 -1013 . DOI: 10.7606/j.issn.1009-1041.2026.08.02
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Year 2026 volume 46 Issue 8
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Article Info
doi: 10.7606/j.issn.1009-1041.2026.08.02
  • Receive Date：2025-10-23
  • Online Date：2026-09-11
  • Published：2026-08-15
Article Data
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History
  • Received：2025-10-23
  • Revised：2025-11-18
Funding
Affiliations
    1.College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China
    2.State Key Lab of Aridland Crop Science/Seed Industry Institute of Gansu Provincal University, Lanzhou, Gansu 730070, China
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https://castjournals.cast.org.cn/joweb/mlzwxb/EN/10.7606/j.issn.1009-1041.2026.08.02
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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