The bZIP transcription factors are well-known transcription regulators and play a key role in regulating various developmental, biological processes, and stress responses in plants. However, information on bZIP transcription factors is not yet available in oil palm, an important oil yielding crop. The present study identified the 97 bZIP transcription factor family members in oil palm genome via a genome-wide approach. Phylogenetic analysis clustered all EgbZIPs into 12 clusters with Arabidopsis and rice bZIPs. EgbZIP gene structure analysis showed a distinct variation in the intron–exon organization among all EgbZIPs. Conserved motif analysis demonstrated the occurrence of ten additional conserved motifs besides having a common bZIP domain. All the identified 97 EgbZIPs were unevenly distributed on 16 chromosomes and exhibited tandem duplication in oil palm genome. Our results aslo demonstrated that tissue-specific expression patterns of EgbZIPs based on the available transcriptome data of six different tissue of oil palm. Stress-responsive expression analysis showed that 11EgbZIP transcription factors were highly expressed under cold, salinity, drought stress conditions. Taken together, our findings will provide insightful information on bZIP transcription factors as one of the stress-responsive regulators in oil palm.

bZIP转录因子是众所周知的转录调节因子，在调节植物的各种发育、生物学过程和应激反应中发挥着关键作用。然而，在油棕这一重要的产油作物中， bZIP转录因子的信息尚不可用。本研究通过全基因组方法鉴定了油棕基因组中的 97 个bZIP转录因子家族成员。系统发育分析将所有EgbZIP与拟南芥和水稻bZIP聚集成 12 个簇。EgbZIP基因结构分析显示所有EgbZIP中内含子 - 外显子组织的明显变化. 保守基序分析表明，除了具有共同的bZIP结构域外，还出现了十个额外的保守基序。所有鉴定的 97 个EgbZIP均不均匀分布在 16 条染色体上，并在油棕基因组中呈现串联重复。我们的结果还表明，基于六种不同油棕组织的可用转录组数据，EgbZIP的组织特异性表达模式。胁迫响应表达分析表明，11个EgbZIP转录因子在寒冷、盐分、干旱胁迫条件下高表达。总之，我们的研究结果将提供关于bZIP转录因子作为油棕中压力反应调节因子之一的深刻信息。