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农业生物技术学报  2023, Vol. 31 Issue (1): 36-49    DOI: 10.3969/j.issn.1674-7968.2023.01.004
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Genome-wide Identification and Expression Analysis of DIR Gene Family in Tomato (Solanum lycopersicum)
SUN Hui-Ru1,2,*, ZHANG Jia-Ning1, REN Min1, WANG Yan-Feng1,2,*
1 College of Life Sciences, Yan'an University, Yan'an 716000, China;
2 Shaanxi Key Laboratory of Chinese Jujube, Yan'an University, Yan'an 716000, China
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Abstract  Dirigent genes (DIRs) are important regulator in the biosynthesis of plant lignin and lignans, and play pivotal roles in plant growth and development, and stress response. In order to explore the function of SlDIR family genes in tomato (Solanum lycopersicum), bioinformatics analysis of SlDIR members were carried out and expression characteristics of them in different organs, various stresses and abscisic acid (ABA) treatments were detected by released RNA-seq in TFGD website and qPCR. The results showed that 31 SlDIR genes were identified in tomato, which were unevenly distributed on 11 chromosomes (except Chr03) with 3 tandem duplication clusters. Most of SlDIR genes had no intron. The phylogenetic analysis displayed that the SlDIR family mumbers were classified into 3 subfamilies, the member numbers of which were various. All of SlDIR proteins had dirigent domain, and most of them also contained signal peptide. The distribution and arrangement of the motifs in SlDIRs from the same subfamily were similar. In addition, plant hormone and stress response elements were widely distributed in the promoter regions of SlDIRs. The expression characteristics of SlDIRs in different organs and different resistant materials under Pseudomonas syringae pv. tomato DC3000 (Pst DC3000) treatment were further analyzed. It was found that most SlDIRs were predominance expressed in roots, and the expressions of SlDIR5, SlDIR9, SlDIR13, SlDIR15 and SlDIR27 were significantly higher in the early stages than that in the later stages of tomato fruit development. The significantly different expressions of 11 SlDIRs were displayed between resistant and sensitive tomato varieties under Pst DC3000 treatment. Under ABA treatment for 12 h, the expressions of 7 SlDIRs were significantly up-regulated. Salt stress significantly induced the expression of SlDIR27. Meanwhile, SlDIR13 and SlDIR27 showed up-regulated expressions significantly under drought treatment. The results of this study provide a reference for further study on the biological functions of SlDIR family genes.
Key wordsSolanum lycopersicum      DIR gene family      Bioinformatics analysis      Stress      ABA      Expression analysis     
Received: 23 March 2022     
ZTFLH:  S641.2  
Corresponding Authors: *shrpiaoliu@163.com; yadxwyf@yau.edu.cn   
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SUN Hui-Ru
ZHANG Jia-Ning
REN Min
WANG Yan-Feng
Cite this article:   
SUN Hui-Ru,ZHANG Jia-Ning,REN Min, et al. Genome-wide Identification and Expression Analysis of DIR Gene Family in Tomato (Solanum lycopersicum)[J]. 农业生物技术学报, 2023, 31(1): 36-49.
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http://journal05.magtech.org.cn/Jwk_ny/EN/10.3969/j.issn.1674-7968.2023.01.004     OR     http://journal05.magtech.org.cn/Jwk_ny/EN/Y2023/V31/I1/36
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