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Wang Y, Du F, Wang J, Li Y, Zhang Y, Zhao X, Zheng T, Li Z, Xu J, Wang W, Fu B. Molecular Dissection of the Gene OsGA2ox8 Conferring Osmotic Stress Tolerance in Rice. Int J Mol Sci 2021; 22:ijms22179107. [PMID: 34502018 PMCID: PMC8430958 DOI: 10.3390/ijms22179107] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 08/18/2021] [Accepted: 08/20/2021] [Indexed: 11/23/2022] Open
Abstract
Gibberellin 2-oxidase (GA2ox) plays an important role in the GA catabolic pathway and the molecular function of the OsGA2ox genes in plant abiotic stress tolerance remains largely unknown. In this study, we functionally characterized the rice gibberellin 2-oxidase 8 (OsGA2ox8) gene. The OsGA2ox8 protein was localized in the nucleus, cell membrane, and cytoplasm, and was induced in response to various abiotic stresses and phytohormones. The overexpression of OsGA2ox8 significantly enhanced the osmotic stress tolerance of transgenic rice plants by increasing the number of osmotic regulators and antioxidants. OsGA2ox8 was differentially expressed in the shoots and roots to cope with osmotic stress. The plants overexpressing OsGA2ox8 showed reduced lengths of shoots and roots at the seedling stage, but no difference in plant height at the heading stage was observed, which may be due to the interaction of OsGA2ox8 and OsGA20ox1, implying a complex feedback regulation between GA biosynthesis and metabolism in rice. Importantly, OsGA2ox8 was able to indirectly regulate several genes associated with the anthocyanin and flavonoid biosynthetic pathway and the jasmonic acid (JA) and abscisic acid (ABA) biosynthetic pathway, and overexpression of OsGA2ox8 activated JA signal transduction by inhibiting the expression of jasmonate ZIM domain-containing proteins. These results provide a basis for a future understanding of the networks and respective phenotypic effects associated with OsGA2ox8.
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Affiliation(s)
- Yinxiao Wang
- Institute of Crop Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, South Zhong-Guan-Cun Street 12, Beijing 100081, China; (Y.W.); (F.D.); (J.W.); (Y.L.); (Y.Z.); (X.Z.); (T.Z.); (Z.L.); (J.X.)
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, South Zhong-Guan-Cun Street 12, Beijing 100081, China
| | - Fengping Du
- Institute of Crop Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, South Zhong-Guan-Cun Street 12, Beijing 100081, China; (Y.W.); (F.D.); (J.W.); (Y.L.); (Y.Z.); (X.Z.); (T.Z.); (Z.L.); (J.X.)
- College of Life Sciences, Northwest A&F University, Xianyang 712100, China
| | - Juan Wang
- Institute of Crop Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, South Zhong-Guan-Cun Street 12, Beijing 100081, China; (Y.W.); (F.D.); (J.W.); (Y.L.); (Y.Z.); (X.Z.); (T.Z.); (Z.L.); (J.X.)
| | - Yingbo Li
- Institute of Crop Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, South Zhong-Guan-Cun Street 12, Beijing 100081, China; (Y.W.); (F.D.); (J.W.); (Y.L.); (Y.Z.); (X.Z.); (T.Z.); (Z.L.); (J.X.)
| | - Yue Zhang
- Institute of Crop Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, South Zhong-Guan-Cun Street 12, Beijing 100081, China; (Y.W.); (F.D.); (J.W.); (Y.L.); (Y.Z.); (X.Z.); (T.Z.); (Z.L.); (J.X.)
| | - Xiuqin Zhao
- Institute of Crop Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, South Zhong-Guan-Cun Street 12, Beijing 100081, China; (Y.W.); (F.D.); (J.W.); (Y.L.); (Y.Z.); (X.Z.); (T.Z.); (Z.L.); (J.X.)
| | - Tianqing Zheng
- Institute of Crop Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, South Zhong-Guan-Cun Street 12, Beijing 100081, China; (Y.W.); (F.D.); (J.W.); (Y.L.); (Y.Z.); (X.Z.); (T.Z.); (Z.L.); (J.X.)
| | - Zhikang Li
- Institute of Crop Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, South Zhong-Guan-Cun Street 12, Beijing 100081, China; (Y.W.); (F.D.); (J.W.); (Y.L.); (Y.Z.); (X.Z.); (T.Z.); (Z.L.); (J.X.)
- College of Agronomy, Anhui Agricultural University, Hefei 230036, China
| | - Jianlong Xu
- Institute of Crop Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, South Zhong-Guan-Cun Street 12, Beijing 100081, China; (Y.W.); (F.D.); (J.W.); (Y.L.); (Y.Z.); (X.Z.); (T.Z.); (Z.L.); (J.X.)
| | - Wensheng Wang
- Institute of Crop Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, South Zhong-Guan-Cun Street 12, Beijing 100081, China; (Y.W.); (F.D.); (J.W.); (Y.L.); (Y.Z.); (X.Z.); (T.Z.); (Z.L.); (J.X.)
- College of Agronomy, Anhui Agricultural University, Hefei 230036, China
- Correspondence: (W.W.); (B.F.); Tel.: +86-10-82106698 (W.W. & B.F.); Fax: +86-10-68918559 (W.W. & B.F.)
| | - Binying Fu
- Institute of Crop Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences, South Zhong-Guan-Cun Street 12, Beijing 100081, China; (Y.W.); (F.D.); (J.W.); (Y.L.); (Y.Z.); (X.Z.); (T.Z.); (Z.L.); (J.X.)
- Correspondence: (W.W.); (B.F.); Tel.: +86-10-82106698 (W.W. & B.F.); Fax: +86-10-68918559 (W.W. & B.F.)
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