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Article

Genome-Wide Identification and Functional Analysis of the AP2/ERF Transcription Factor Family in Citrus Rootstock under Waterlogging Stress

by
Wen He
†,
Liang Luo
†,
Rui Xie
,
Jiufeng Chai
,
Hao Wang
,
Yan Wang
,
Qing Chen
,
Zhiwei Wu
,
Shaofeng Yang
,
Mengyao Li
,
Yuanxiu Lin
,
Yunting Zhang
,
Ya Luo
,
Yong Zhang
,
Haoru Tang
and
Xiaorong Wang
*
College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China
*
Author to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Int. J. Mol. Sci. 2023, 24(10), 8989; https://doi.org/10.3390/ijms24108989
Submission received: 11 April 2023 / Revised: 3 May 2023 / Accepted: 16 May 2023 / Published: 19 May 2023
(This article belongs to the Special Issue Horticultural Crop Improvement: A New Era for Plant Molecular Research)
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Abstract

Citrus plants are sensitive to waterlogging, and the roots are the first plant organ affected by hypoxic stress. The AP2/ERF (APETALA2/ethylene-responsive element binding factors) can modulate plant growth and development. However, the information on AP2/ERF genes in citrus rootstock and their involvement in waterlogging conditions is limited. Previously, a rootstock cultivar, Citrus junos cv. Pujiang Xiangcheng was found to be highly tolerant to waterlogging stress. In this study, a total of 119 AP2/ERF members were identified in the C. junos genome. Conserved motif and gene structure analyses indicated the evolutionary conservation of PjAP2/ERFs. Syntenic gene analysis revealed 22 collinearity pairs among the 119 PjAP2/ERFs. The expression profiles under waterlogging stress showed differential expression of PjAP2/ERFs, of which, PjERF13 was highly expressed in both root and leaf. Furthermore, the heterologous expression of PjERF13 significantly enhanced the tolerance of transgenic tobacco to waterlogging stress. The overexpression of PjERF13 decreased the oxidative damage in the transgenic plants by reducing the H2O2 and MDA contents and increasing the antioxidant enzyme activities in the root and leaf. Overall, the current study provided basic information on the AP2/ERF family in the citrus rootstock and uncovered their potential function in positively regulating the waterlogging stress response.
Keywords: Pujiang Xiangcheng; AP2/ERF; waterlogging; transcriptome; overexpression Pujiang Xiangcheng; AP2/ERF; waterlogging; transcriptome; overexpression

Share and Cite

MDPI and ACS Style

He, W.; Luo, L.; Xie, R.; Chai, J.; Wang, H.; Wang, Y.; Chen, Q.; Wu, Z.; Yang, S.; Li, M.; et al. Genome-Wide Identification and Functional Analysis of the AP2/ERF Transcription Factor Family in Citrus Rootstock under Waterlogging Stress. Int. J. Mol. Sci. 2023, 24, 8989. https://doi.org/10.3390/ijms24108989

AMA Style

He W, Luo L, Xie R, Chai J, Wang H, Wang Y, Chen Q, Wu Z, Yang S, Li M, et al. Genome-Wide Identification and Functional Analysis of the AP2/ERF Transcription Factor Family in Citrus Rootstock under Waterlogging Stress. International Journal of Molecular Sciences. 2023; 24(10):8989. https://doi.org/10.3390/ijms24108989

Chicago/Turabian Style

He, Wen, Liang Luo, Rui Xie, Jiufeng Chai, Hao Wang, Yan Wang, Qing Chen, Zhiwei Wu, Shaofeng Yang, Mengyao Li, and et al. 2023. "Genome-Wide Identification and Functional Analysis of the AP2/ERF Transcription Factor Family in Citrus Rootstock under Waterlogging Stress" International Journal of Molecular Sciences 24, no. 10: 8989. https://doi.org/10.3390/ijms24108989

APA Style

He, W., Luo, L., Xie, R., Chai, J., Wang, H., Wang, Y., Chen, Q., Wu, Z., Yang, S., Li, M., Lin, Y., Zhang, Y., Luo, Y., Zhang, Y., Tang, H., & Wang, X. (2023). Genome-Wide Identification and Functional Analysis of the AP2/ERF Transcription Factor Family in Citrus Rootstock under Waterlogging Stress. International Journal of Molecular Sciences, 24(10), 8989. https://doi.org/10.3390/ijms24108989

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