Overexpression of EiKCS confers paraquat-resistance in rice (Oryza sativa L.) by promoting the polyamine pathway.
| Autor: | Luo Q; Department of Crop Cultivation and Farming System, South China Agricultural University, Guangzhou, China.; Department of Crop, Soil, and Environmental Sciences, Auburn University, Auburn, AL, USA., Chen S; Department of Crop Cultivation and Farming System, South China Agricultural University, Guangzhou, China., Zhu J; Department of Crop Cultivation and Farming System, South China Agricultural University, Guangzhou, China., Ye L; Department of Crop Cultivation and Farming System, South China Agricultural University, Guangzhou, China., Hall ND; Department of Crop, Soil, and Environmental Sciences, Auburn University, Auburn, AL, USA., Basak S; Department of Crop, Soil, and Environmental Sciences, Auburn University, Auburn, AL, USA., McElroy JS; Department of Crop, Soil, and Environmental Sciences, Auburn University, Auburn, AL, USA., Chen Y; Department of Crop Cultivation and Farming System, South China Agricultural University, Guangzhou, China. |
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| Jazyk: | angličtina |
| Zdroj: | Pest management science [Pest Manag Sci] 2022 Jan; Vol. 78 (1), pp. 246-262. Date of Electronic Publication: 2021 Sep 22. |
| DOI: | 10.1002/ps.6628 |
| Abstrakt: | Background: Paraquat is used widely as one of the bipyridine herbicides, which generates reactive oxygen species to cause cell death. With a growing number of paraquat-resistant weeds, the mechanism of paraquat-resistance in plants remains unclear. This research verified the functions of a previously confirmed putative paraquat-resistant gene, EiKCS, from paraquat-resistant goosegrass by genetic engineering in a single overexpressing line in rice. Results: Overexpression of EiKCS improved paraquat resistance in transgenic rice (KCSox). Pre-applied (12 h) exogenous spermidine (1.5 mmol L -1 ), alleviated the injury of paraquat in rice. Paraquat induced injury in KCSox was 19.57%, which was lower than 32.22% injury it induced in wild-type (WT) rice. The paraquat-resistant mechanism was through the increased activity of antioxidant enzymes and the overproduction of endogenous polyamines. The spermine content in KCSox was more than 30 μg mL -1 , while that in WT rice was less than 5 μg mL -1 . Quantitative proteomics showed that β-ketoacyl-coenzyme A (CoA) synthase (51.81 folds) encoded by the transgenic EiKCS gene promoted the synthesis of the proteins involved with the polyamine pathway. The synthesized putrescine was promoted by the arginine decarboxylase (ADC) pathway. The spermidine synthase I (1.10-fold) and three eceriferum cofactors (CERs) were responsive to the paraquat stress. We validated putrescine (C Conclusion: EiKCS encoding β-ketoacyl-CoA synthase from goosegrass has been shown as an ideal candidate gene for engineering genetically modified organism (GMO) crops, as its overexpression does not only bring paraquat-resistance, but also have potential benefits without decreasing yield and rice grain quality. © 2021 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry. (© 2021 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.) |
| Databáze: | MEDLINE |
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