| Sorghum SbGhd7 is a major regulator of floral transition and directly represses genes crucial for flowering activation | |
Tadesse, Dimiru; Yee, Estella F.; Wolabu, Tezera W.; Wang, Hui1,3; Yun, Jianfei1; Grosjean, Nicolas4; Kumaran, Desigan; Santiago, Kassandra; Kong, Wenqian5; Sharma, Ankush; Chen, Jianghua7 ; Paterson, Andrew H.; Xie, Meng; Tadege, Million1
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| 2024 | |
| Source Publication | NEW PHYTOLOGIST
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| ISSN | 0028-646X |
| Volume | 242Issue:2Pages:786-796 |
| Abstract | Molecular genetic understanding of flowering time regulation is crucial for sorghum development. GRAIN NUMBER, PLANT HEIGHT AND HEADING DATE 7 (SbGhd7) is one of the six classical loci conferring photoperiod sensitivity of sorghum flowering. However, its functions remain poorly studied. The molecular functions of SbGhd7 were characterized. The gene regulatory network controlled by SbGhd7 was constructed and validated. The biological roles of SbGhd7 and its major targets were studied. SbGhd7 overexpression (OE) completely prevented sorghum flowering. Additionally, we show that SbGhd7 is a major negative regulator of flowering, binding to the promoter motif TGAATG(A/T)(A/T/C) and repressing transcription of the major florigen FLOWERING LOCUS T 10 (SbFT10) and floral activators EARLY HEADING DATE (SbEhd1), FLAVIN-BINDING, KELCH REPEAT, F-BOX1 (SbFKF1) and EARLY FLOWERING 3 (SbELF3). Reinforcing the direct effect of SbGhd7, SbEhd1 OE activated the promoters of three functional florigens (SbFT1, SbFT8 and SbFT10), dramatically accelerating flowering. Our studies demonstrate that SbGhd7 is a major repressor of sorghum flowering by directly and indirectly targeting genes for flowering activation. The mechanism appears ancient. Our study extends the current model of floral transition regulation in sorghum and provides a framework for a comprehensive understanding of sorghum photoperiod response. |
| Keyword | flowering time FT gene regulatory network Ghd7 sorghum transcription factor |
| Subject Area | Plant Sciences |
| DOI | 10.1111/nph.19591 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:001180871600001 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | https://ir.xtbg.ac.cn/handle/353005/14084 |
| Collection | 2012年后新成立研究组 |
| Affiliation | 1.Brookhaven Natl Lab, Biol Dept, Upton, NY 11973 USA 2.Oklahoma State Univ, Inst Agr Biosci, Dept Plant & Soil Sci, Ardmore, OK 73401 USA 3.Yee, Estella F.] Brookhaven Natl Lab, Natl Synchrotron Light Source, Upton, NY 11973 USA 4.China Agr Univ, Coll Grassland Sci & Technol, Beijing 100193, Peoples R China 5.Lawrence Berkeley Natl Lab, DOE Joint Genome Inst, Berkeley, CA 94720 USA 6.Univ Georgia, Dept Soil & Crop Sci, Athens, GA 30602 USA 7.Sharma, Ankush; Paterson, Andrew H.] Univ Georgia, Plant Genome Mapping Lab, Athens, GA 30602 USA 8.Chinese Acad Sci, Ctr Excellence Mol Plant Sci, Key Lab Trop Plant Resources & Sustainable Use, Xishuangbanna Trop Bot Garden, Kunming 650223, Yunnan, Peoples R China |
| Recommended Citation GB/T 7714 | Tadesse, Dimiru,Yee, Estella F.,Wolabu, Tezera W.,et al. Sorghum SbGhd7 is a major regulator of floral transition and directly represses genes crucial for flowering activation[J]. NEW PHYTOLOGIST,2024,242(2):786-796. |
| APA | Tadesse, Dimiru.,Yee, Estella F..,Wolabu, Tezera W..,Wang, Hui.,Yun, Jianfei.,...&Tadege, Million.(2024).Sorghum SbGhd7 is a major regulator of floral transition and directly represses genes crucial for flowering activation.NEW PHYTOLOGIST,242(2),786-796. |
| MLA | Tadesse, Dimiru,et al."Sorghum SbGhd7 is a major regulator of floral transition and directly represses genes crucial for flowering activation".NEW PHYTOLOGIST 242.2(2024):786-796. |
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