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The auxin response factor (ARF) gene family in Oil palm (Elaeis guineensis Jacq.): Genome-wide identification and their expression profiling under abiotic stresses

文献类型： 外文期刊

作者： Jin, Longfei 1 ; Yarra, Rajesh 1 ; Zhou, Lixia 1 ; Cao, Hongxing 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Hainan Key Lab Trop Oil Crops Biol, Coconut Res Inst, Wenchang 571339, Hainan, Peoples R China

关键词： ARF; Auxin; Oil palm; Abiotic stress

期刊名称：PROTOPLASMA （ 影响因子：2.751； 五年影响因子：2.772 ）

ISSN： 0033-183X

年卷期：

页码：

收录情况： SCI

摘要： Auxin response factors (ARFs) play vital role in controlling growth and developmental processes of plants via regulating the auxin signaling pathways. However, the identification and functional roles of ARFs in oil palm plants remain elusive. Here, we identified a total of 23 ARF (EgARF) genes in oil palm through a genome-wide identification approach. The EgARF gene structure analysis revealed the presence of intron-rich ARF gene family in genome of oil palm. Further analysis demonstrated the uneven distribution of 23EgARFs on 16 chromosomes of oil palm. Phylogenetic analysis clustered all the EgARFs into four groups. Twenty-one EgARFs contained BDD, ARF, and CTD domains, whereas EgARF5 and EgARF7 lacked the CTD domain. The evolution of ARF genes in oil palm genome has been expanded by segmental duplication events. The cis-acting regulatory elements of EgARF gene family were predominantly associated with the stress and hormone responses. Expression profiling data demonstrated the constitutive and tissue-specific expression of EgARF genes in various tissues of oil palm. Real-time PCR analysis of 19 EgARF genes expression levels under cold, drought, and salt stress conditions proved their prominent role under abiotic stress responses. Altogether, our study provides a basis for studying the molecular and functional roles of ARF genes in oil palm.

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