Molecular analysis of a novel alkaline metal salt (NaCl)-responsive WRKY transcription factor gene IlWRKY1 from the halophyte Iris lactea var. chinensis
文献类型： 外文期刊
作者： Tang, Jun 1 ; Liu, Qingquan 1 ; Yuan, Haiyan 1 ; Zhang, Yongxia 1 ; Huang, Suzhen 1 ;
作者机构： 1.Jiangsu Prov & Chinese Acad Sci, Inst Bot, Nanjing 210014, Jiangsu, Peoples R China
2.Jiangsu Acad Agr Sci, Jiangsu Key Lab Hort Crop Genet Improvement, Nanjing 210014, Jiangsu, Peoples R China
关键词： Iris lactea var. chinensis; Alkaline metal salt stress; WRKY transcription factors; Halophyte; Remediation
期刊名称：INTERNATIONAL BIODETERIORATION & BIODEGRADATION （ 影响因子：4.32； 五年影响因子：4.719 ）
ISSN： 0964-8305
年卷期： 2018 年 127 卷
页码：
收录情况： SCI
摘要： Soil salinization limits plant growth and threatens crop production. Research on salt response in plants, especially halophytes, is imperative. WRKY transcription factors (TFs) have critical regulatory roles in plant alkaline metal (sodium) salt stress response. Iris lactea var. chinensis is an ornamental and perennial herbaceous halophyte. In this study, a new WRKY TF gene IlWRKY1 was firstly cloned from I. lactea var. chinensis. IlWRKY1 cDNA sequence contains an open reading frame (ORF) of 1083 bp, which encodes a protein (Mw: 38.77 kDa; pi: 5.22) of 361 amino acids. Analysis of the conserved domains of protein sequence indicated that IlWRKY1 belonged to the Group III WRKY TFs. Phylogenetic analysis showed that the IlWRKY1 was much closer to AoWRKY41 from Asparagus officinalis and MaWRKY41 from Musa acuminate subsp. malaccensis. Furthermore, analysis of mRNA transcriptional levels revealed that the expression of IlWRKY1 was notably increased under NaCl stress in I. lactea var. chinensis shoots, and achieved the highest level after 24 h of NaCI stress, suggesting that IlWRKY1 may be involved in I. lactea var. chinensis sodium salt responses. This work will conduce to the research on the molecular mechanism underlying the regulation of the sodium salt tolerance in L lactea var. chinensis by IlWRKY1.
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