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Ectopic expression of NnPER1, a Nelumbo nucifera 1-cysteine peroxiredoxin antioxidant, enhances seed longevity and stress tolerance in Arabidopsis

文献类型： 外文期刊

作者： Chen, Hu-hui 1 ; Chu, Pu 2 ; Zhou, Yu-liang 3 ; Ding, Yu 4 ; Li, Yin 1 ; Liu, Jun 6 ; Jiang, Li-wen 5 ; Huang, Shang-zhi 1 ;

作者机构： 1.Sun Yat Sen Univ, Sch Life Sci, State Key Lab Biocontrol & Guangdong Key Lab Plan, Guangzhou, Guangdong, Peoples R China

2.Nanjing Agr Univ, Coll Agr, State Key Lab Crop Genet & Germplasm Enhancement, Nanjing, Jiangsu, Peoples R China

3.South China Agr Univ, Guangdong Prov Key Lab Plant Mol Breeding, Guangzhou, Guangdong, Peoples R China

4.Jinan Univ, Dept Food Sci & Engn, Guangzhou 510632, Guangdong, Peoples R China

5.Chinese Univ Hong Kong, Ctr Cell & Dev Biol, Sch Life Sci, Hong Kong, Hong Kong, Peoples R China

6.Guangdong Acad Agr Sci, Agro Biol Gene Res Ctr, Guangzhou 510640, Guangdong, Peoples R China

关键词： 1-Cys Prx;PER1;seed longevity;controlled deterioration treatment;abscisic acid;abiotic stress tolerance;sacred lotus

期刊名称：PLANT JOURNAL （ 影响因子：6.417； 五年影响因子：7.627 ）

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收录情况： SCI

摘要： Seed longevity, the maintenance of viability during storage, is a major factor for conservation of genetic resources and biodiversity. Seed longevity is an important trait of agriculture crop and is impaired by reactive oxygen species (ROS) during seed desiccation, storage and germination (C. R. Biol., 331, 2008 and 796). Seeds possess a wide range of systems (protection, detoxification, repair) allowing them to survive during storage and to preserve a high germination ability. In many plants, 1-cys peroxiredoxin (1-Cys Prx, also named PER1) is a seed-specific antioxidant which eliminates ROS with cysteine residues. Here we identified and characterized a seed-specific PER1 protein from seeds of sacred lotus (Nelumbo nucifera Gaertn.). Purified NnPER1 protein protects DNA against the cleavage by ROS in the mixed-function oxidation system. The transcription and protein accumulation of NnPER1 increased during seed desiccation and imbibition and under abiotic stress treatment. Ectopic expression of NnPER1 in Arabidopsis enhanced the seed germination ability after controlled deterioration treatment (CDT), indicating that NnPER1 improves seed longevity of transgenic plants. Consistent with the function of NnPER1 on detoxifying ROS, we found that the level of ROS release and lipid peroxidation was strikingly lower in transgenic seeds compared to wild-type with or without CDT. Furthermore, transgenic Arabidopsis seeds ectopic-expressing NnPER1 displayed enhanced tolerance to high temperature and abscisic acid (ABA), indicating that NnPER1 may participate in the thermotolerance and ABA signaling pathway.

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