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Horticulturae
Volume 11
Issue 7
10.3390/horticulturae11070715
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Expression Analysis of the ABF Gene Family in Actinidia chinensis Under Drought Stress and the Response Mechanism to Abscisic Acid

by
Haoyu Wang
1,†,
Yinqiang Zi
1,†,
Xu Rong
2,†,
Qian Zhang
3,
Lili Nie
3,
Jie Wang
1,
Hailin Ren
1,
Hanyao Zhang
1,* and
Xiaozhen Liu
3,*
1
Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Ministry of Education, Southwest Forestry University, Kunming 650224, China
2
School of Chemical, Biological and Environmental, Yuxi Normal University, Yuxi 653100, China
3
Key Laboratory of Biodiversity Conservation in Southwest China, National Forest and Grassland Administration, Southwest Forestry University, Kunming 650224, China
*
Authors to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Horticulturae 2025, 11(7), 715; https://doi.org/10.3390/horticulturae11070715
Submission received: 7 May 2025 / Revised: 9 June 2025 / Accepted: 18 June 2025 / Published: 20 June 2025
(This article belongs to the Special Issue Biotic and Abiotic Stress Responses of Horticultural Plants)
Versions Notes

Abstract

Drought can limit plant growth. The ABRE binding factor (ABF) gene family is extensively involved in multifarious bioregulatory processes in plants. However, kiwifruit has not yet been systematically analyzed. This study analyzed the response of kiwifruit AcABF genes to drought stress. Eleven AcABF genes were distributed on nine chromosomes and clustered into three subfamilies with Arabidopsis AtABF genes, AcABF2, AcABF3, AcABF8, AcABF9, and AcABF10, which have drought resistance functions, and AtABF1, AtABF2, AtABF3, and AtABF4 were clustered in Group I. The structural domains of the nine ABF genes in Group I were highly conserved, and the protein structures were highly similar. In the analysis of the five AcABF genes in Group I, all of their cis-acting elements were related to ABA, the content of ABA-like hormones was significantly increased after drought stress, and most of the GO (Gene Ontology) and KEGG (Kyoto Encyclopedia of Genes and Genomes) enrichment results were related to hormonal processes. A total of six AcABF genes were upregulated under drought stress. qRT-PCR was performed to validate the AcABF genes of Group I. The correlation coefficients of the results with the transcriptome data were all above 0.70, and the expression level of ABA increased under drought treatment. These results indicated that the five AcABF genes were positively correlated with ABA under drought stress and that, by synthesizing ABA and facilitating the expression of ABF gene family members, the tolerance of kiwifruit increased. These results provide a solid foundation for further research on improving drought tolerance in kiwifruit.
Keywords: drought; Actinidia chinensis; ABF gene; ABA; qRT-PCR drought; Actinidia chinensis; ABF gene; ABA; qRT-PCR

Share and Cite

MDPI and ACS Style

Wang, H.; Zi, Y.; Rong, X.; Zhang, Q.; Nie, L.; Wang, J.; Ren, H.; Zhang, H.; Liu, X. Expression Analysis of the ABF Gene Family in Actinidia chinensis Under Drought Stress and the Response Mechanism to Abscisic Acid. Horticulturae 2025, 11, 715. https://doi.org/10.3390/horticulturae11070715

AMA Style

Wang H, Zi Y, Rong X, Zhang Q, Nie L, Wang J, Ren H, Zhang H, Liu X. Expression Analysis of the ABF Gene Family in Actinidia chinensis Under Drought Stress and the Response Mechanism to Abscisic Acid. Horticulturae. 2025; 11(7):715. https://doi.org/10.3390/horticulturae11070715

Chicago/Turabian Style

Wang, Haoyu, Yinqiang Zi, Xu Rong, Qian Zhang, Lili Nie, Jie Wang, Hailin Ren, Hanyao Zhang, and Xiaozhen Liu. 2025. "Expression Analysis of the ABF Gene Family in Actinidia chinensis Under Drought Stress and the Response Mechanism to Abscisic Acid" Horticulturae 11, no. 7: 715. https://doi.org/10.3390/horticulturae11070715

APA Style

Wang, H., Zi, Y., Rong, X., Zhang, Q., Nie, L., Wang, J., Ren, H., Zhang, H., & Liu, X. (2025). Expression Analysis of the ABF Gene Family in Actinidia chinensis Under Drought Stress and the Response Mechanism to Abscisic Acid. Horticulturae, 11(7), 715. https://doi.org/10.3390/horticulturae11070715

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