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ABSTRACT
Eukaryotic gene expression is regulated by RNA interference (RNAi). Dicer-like (DCL), Argonaute (AGO), and RNA-dependent RNA polymerase (RDR) are essential elements involved in the process of RNAi. However, Jatropha (J.) curcas, an oil-producing plant, has not undergone any previous systematic analysis or expression profiling of these genes. In this study, a total of four JcDCL, nine JcAGO, and seven JcRDR genes were identified in the J. curcas genome. Based on phylogenetic analysis, each gene family was classified into four clades and randomly distributed on nine J. curcas chromosomes. Protein sequence alignment revealed that the classical PAZ, Piwi, and RdRP domains were present in all JcDCLs, JcAGOs, and JcRDRs, respectively. Comprehensive expression pattern analysis using RNA-seq data showed various expression patterns in different organs and under different abiotic stresses. In addition, special attention should be paid to JcDCL1, JcAGO1, JcAGO4, and JcRDR5, which play important roles in response to various stresses.
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The authors declare that no conflicts of interest with regard to this research or its funding.
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Haibo Wang
Haibo Wang, Professor, Doctor's degree
Graduated from School of Life Sciences, Yunnan Normal University in 2015
Research topics: Plant stress molecular biology
Yong Gao
Yong Gao, Associate Professor, Doctor's degree
Graduated from South China Botanical Garden, Chinese Academic of Sciences in 2016
Research topics: Plant genetic diversity and adaptation
Junyun Guo
Junyun Guo, Teacher Lecturer, Master's degree
Graduated from College of Resources and Environment, Southwest University in 2008
Research topics: Plant cultivation and nutrition