Transcription characteristics of wheat glutamine synthetase isoforms and the sequence analysis of their promoters
WANG Xiao-Chun,1,2, WANG Lu-Lu1, ZHANG Zhi-Yong1, QIN Bu-Tan1, YU Mei-Qin2, WEI Yi-Hao1, MA Xin-Ming,1,*1Collaborative Innovation Center of Henan Grain Crops, Henan Agricultural University, Zhengzhou 450002, Henan, China 2College of Life Science, Henan Agricultural University, Zhengzhou 450002, Henan, China
Abstract As a key enzyme for nitrogen assimilation in wheat, glutamine synthetase is grouped into two classes: cytosolic GS and chloroplastic GS (TaGS2), and cytosolic GS includes TaGS1, TaGSr, and TaGSe. In order to study the expression characteristics and regulatory mechanisms of GS isozymes in chromosome A, B, and D of heterohexaploid wheat, transcripts of TaGS isoforms were analyzed based on the third-generation sequencing technology transcriptome analysis, and 12 promoters of TaGS isozymes of Yumai 49 were cloned based on Chinese Spring genome, and the sequence of the promoters were analyzed. The results showed that TaGS1 was mainly transcribed on chromosome 6B, TaGSe and TaGSr on chromosome 4D, and TaGS2 on chromosome 2D. Furthermore, the distance from initiation codon ATG to initiation site of transcript for each promoter of TaGS was distinct. Promoter element analysis showed that the promoter of TaGS1 in 6B had more W-box, AC-I, ABRE, as-1, and methyl jasmonic response elements, the promoter of TaGSe in 4D had more stress response elements (MYB, MBS, LTR, etc.) and auxin response element, the promoter of TaGSr in 4D had more WRE3 and transcript factor response elements, the promoter of TaGS2 in 2D had more A-box, WRE3, ARE, and an AT enrichment region. In summary, the number, type and order of cis-elements of different promoters of TaGS isozymes were distinct, which provided the foundation for further study on the regulation mechanism of TaGS isozymes. Keywords:wheat;GS isoforms;transcription;promoter;cis-element
PDF (3530KB)元数据多维度评价相关文章导出EndNote|Ris|Bibtex收藏本文 本文引用格式 王小纯, 王露露, 张志勇, 秦步坛, 于美琴, 韦一昊, 马新明. 小麦谷氨酰胺合成酶同工酶转录特点及其启动子序列分析[J]. 作物学报, 2021, 47(4): 761-769. doi:10.3724/SP.J.1006.2021.01046 WANG Xiao-Chun, WANG Lu-Lu, ZHANG Zhi-Yong, QIN Bu-Tan, YU Mei-Qin, WEI Yi-Hao, MA Xin-Ming. Transcription characteristics of wheat glutamine synthetase isoforms and the sequence analysis of their promoters[J]. Acta Agronomica Sinica, 2021, 47(4): 761-769. doi:10.3724/SP.J.1006.2021.01046
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