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Genome-wide identification and characterization of AP2/ERF gene superfamily during flower development in Actinidia eriantha

文献类型： 外文期刊

作者： Jiang, Quan 1 ; Wang, Zhi 1 ; Hu, Guangming 1 ; Yao, Xiaohong 1 ;

作者机构： 1.Chinese Acad Sci, Wuhan Bot Garden, CAS Key Lab Plant Germplasm Enhancement & Special, Wuhan 430074, Hubei, Peoples R China

2.Univ Chinese Acad Sci, Coll Life Sci, Beijing, Peoples R China

3.Hubei Acad Agr Sci, Inst Fruit & Tea, Wuhan 430064, Peoples R China

关键词： Kiwifruit; AP2; ERF; Phylogenetic analysis; Comparative genomics; Expression analysis; Flower development

期刊名称：BMC GENOMICS （ 影响因子：4.547； 五年影响因子：4.931 ）

ISSN： 1471-2164

年卷期： 2022 年 23 卷 1 期

页码：

收录情况： SCI

摘要： Background As one of the largest transcription factor families in plants, AP2/ERF gene superfamily plays important roles in plant growth, development, fruit ripening and biotic and abiotic stress responses. Despite the great progress has been made in kiwifruit genomic studies, little research has been conducted on the AP2/ERF genes of kiwifruit. The increasing kiwifruit genome resources allowed us to reveal the tissue expression profiles of AP2/ERF genes in kiwifruit on a genome-wide basis. Results In present study, a total of 158 AP2/ERF genes in A. eriantha were identified. All genes can be mapped on the 29 chromosomes. Phylogenetic analysis divided them into four main subfamilies based on the complete protein sequences. Additionally, our results revealed that the same subfamilies contained similar gene structures and conserved motifs. Ka/Ks calculation indicated that AP2/ERF gene family was undergoing a strong purifying selection and the evolutionary rates were slow. RNA-seq showed that the AP2/ERF genes were expressed differently in different flower development stages and 56 genes were considered as DEGs among three contrasts. Moreover, qRT-PCR suggested partial genes showed significant expressions as well, suggesting they could be key regulators in flower development in A. eriantha. In addition, two genes (AeAP2/ERF061, AeAP2/ERF067) had abundant transcription level based on transcriptomes, implying that they may play a crucial role in plant flower development regulation and flower tissue forming. Conclusions We identified AP2/ERF genes and demonstrated their gene structures, conserved motifs, and phylogeny relationships of AP2/ERF genes in two related species of kiwifruit, A. eriantha and A. chinensis, and their potential roles in flower development in A. eriantha. Such information would lay the foundation for further functional identification of AP2/ERF genes involved in kiwifruit flower development.

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