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Article

Overexpression of BnaA10.WRKY75 Decreases Cadmium and Salt Tolerance via Increasing ROS Accumulation in Arabidopsis and Brassica napus L

by
Xiaoke Ping
1,2,†,
Qianjun Ye
1,†,
Mei Yan
1,
Jia Wang
1,
Taiyuan Zhang
1,
Sheng Chen
2,
Kadambot H. M. Siddique
2,
Wallace A. Cowling
2,
Jiana Li
1 and
Liezhao Liu
1,*
1
College of Agronomy and Biotechnology, Southwest University, Chongqing 400715, China
2
The UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6000, Australia
*
Author to whom correspondence should be addressed.
These authors contributed equally to this paper as first authors.
Int. J. Mol. Sci. 2024, 25(14), 8002; https://doi.org/10.3390/ijms25148002 (registering DOI)
Submission received: 4 July 2024 / Revised: 17 July 2024 / Accepted: 20 July 2024 / Published: 22 July 2024
(This article belongs to the Special Issue The Gene, Genomics, and Molecular Breeding in Cruciferae Plants 2.0)

Abstract

Soil is indispensable for agricultural production but has been seriously polluted by cadmium and salt in recent years. Many crops are suffering from this, including rapeseed, the third largest global oilseed crop. However, genes simultaneously related to both cadmium and salt stress have not been extensively reported yet. In this study, BnaA10.WRKY75 was screened from previous RNA-seq data related to cadmium and salt stress and further analyses including sequence comparison, GUS staining, transformation and qRT-PCR were conducted to confirm its function. GUS staining and qRT-PCR results indicated BnaA10.WRKY75 was induced by CdCl2 and NaCl treatment. Sequence analysis suggested BnaA10.WRKY75 belongs to Group IIc of the WRKY gene family and transient expression assay showed it was a nuclear localized transcription factor. BnaA10.WRKY75-overexpressing Arabidopsis and rapeseed plants accumulated more H2O2 and O2 and were more sensitive to CdCl2 and NaCl treatment compared with untransformed plants, which may be caused by the downregulation of BnaC03.CAT2. Our study reported that BnaA10.WRKY75 increases sensitivity to cadmium and salt stress by disrupting the balance of reactive oxygen species both in Arabidopsis and rapeseed. The results support the further understanding of the mechanisms underlying cadmium and salt tolerance and provide BnaA10.WRKY75 as a valuable gene for rapeseed abiotic stress breeding.
Keywords: BnaA10.WRKY75; cadmium stress; salt stress; CAT2; Brassica napus L. BnaA10.WRKY75; cadmium stress; salt stress; CAT2; Brassica napus L.

Share and Cite

MDPI and ACS Style

Ping, X.; Ye, Q.; Yan, M.; Wang, J.; Zhang, T.; Chen, S.; Siddique, K.H.M.; Cowling, W.A.; Li, J.; Liu, L. Overexpression of BnaA10.WRKY75 Decreases Cadmium and Salt Tolerance via Increasing ROS Accumulation in Arabidopsis and Brassica napus L. Int. J. Mol. Sci. 2024, 25, 8002. https://doi.org/10.3390/ijms25148002

AMA Style

Ping X, Ye Q, Yan M, Wang J, Zhang T, Chen S, Siddique KHM, Cowling WA, Li J, Liu L. Overexpression of BnaA10.WRKY75 Decreases Cadmium and Salt Tolerance via Increasing ROS Accumulation in Arabidopsis and Brassica napus L. International Journal of Molecular Sciences. 2024; 25(14):8002. https://doi.org/10.3390/ijms25148002

Chicago/Turabian Style

Ping, Xiaoke, Qianjun Ye, Mei Yan, Jia Wang, Taiyuan Zhang, Sheng Chen, Kadambot H. M. Siddique, Wallace A. Cowling, Jiana Li, and Liezhao Liu. 2024. "Overexpression of BnaA10.WRKY75 Decreases Cadmium and Salt Tolerance via Increasing ROS Accumulation in Arabidopsis and Brassica napus L" International Journal of Molecular Sciences 25, no. 14: 8002. https://doi.org/10.3390/ijms25148002

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