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Yue Lu,Zhuang Yong,Gu Yuanyang,Li Hui,Tu Shengbin,Yang Xiaocheng,Huang Weizao 한국식물학회 2021 Journal of Plant Biology Vol.64 No.6
The plant-specific transcription factors NACs (NAM, ATAF1, 2, CUC), one major transcription factor family, play significant roles in various physiological processes including abiotic stresses. In our study, an NAC gene from potato (Solanum tuberosum L.) was cloned and named as StNAC1 for a high-sequence similarity to SlNAC1, a well-known tomato NAC gene regulating multiple stress responses and fruit ripening. StNAC1 gene was significantly induced under salt stress. Then, we constructed StNAC1-overexpressing transgenic Nicotiana benthamiana plants and obtained three homozygous transgenic lines. The phenotypic analysis results showed that StNAC1-overexpressing transgenic plants had not only higher seed germination and green leaf rates, but also accumulated less ROS and more proline than wide-type plants under salt stress, which resulted in improving transgenic plants salt tolerance. These suggested that StNAC1 gene might function as a positive regulator in plant response to salt stress.
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SALT-INDUCED CHLOROPLAST PROTEIN (SCP) is Involved in Plant Tolerance to Salt Stress in Arabidopsis
Yong Zhuang,Yangxuan Liu,Yuxiang Li,Ming Wei,Yuying Tang,Penghui Li,Zhijian Liu,Hui Li,Weizao Huang,Songhu Wang 한국식물학회 2019 Journal of Plant Biology Vol.62 No.6
Soil salinization threats the agricultural productionand food security worldwide. Salt stress induced plantsenescence and chloroplast degradation. However, it remainslargely unknown how the chloroplast-localized proteins affectplant response to salt stress. Here, we characterized a novelgene (At5g39520) in Arabidopsis, which is induced by saltstress and encodes a chloroplast-localized protein. Thus, thisgene was named SALT-INDUCED CHLOROPLAST PROTEIN(SCP). A T-DNA insertion mutant of SCP gene (scp-1)showed the enhanced tolerance to salt stress, as indicated bythe increased survival rates, fresh weights and chlorophyllcontents compared with wild type plants under salt treatment. Salt-induced leaf senescence was also delayed in scp-1 mutant. The scp-1 complementation line and SCP overexpressionlines displayed the hypersensitivity to salt stress. The qRTPCRanalysis indicated that the transcripts of CHLOROPLASTVESICULATION (CV), which mediates stress-inducedchloroplast degradation, were altered in scp-1 mutant andSCP overexpression lines. Taken together, our results suggestthat SCP gene plays a negative role in response to salt stress andhas potential application for genetic modification of improvingplant tolerance to salt stress.
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