Overexpression of StCYS1 gene enhances tolerance to salt stress in the transgenic potato (Solanum tuberosum L.) plant

LIU Min-min; LI Ya-lun; LI Guang-cun; DONG Tian-tian; LIU Shi-yang; LIU Pei; WANG Qing-guo

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Overexpression of StCYS1 gene enhances tolerance to salt stress in the transgenic potato (Solanum tuberosum L.) plant

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Salt stress seriously restricts the growth and yield of potatoes.Plant cystatins are vital players in biotic stress and development,however,their roles in salt stress resistance remain elusive.Here,we report that StCYS1 positively regulates salt tolerance in potato plants.An in vitro biochemical test demonstrated that StCYS1 is a bona fide cystatin.Overexpression of StCYS1 in both Escherichia coli and potato plants significantly increased their resistance to high salinity.Further analysis revealed that the transgenic plants accumulated more proline and chlorophyll under salt stress conditions.Moreover,the transgenic plants displayed higher H2O2 scavenging capability and cell membrane integrity compared with wild-type potato.These results demonstrate that StCYS1 is closely correlated with salt stress and its overaccumulation can substantially enhance salt stress resistance.

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《农业科学学报（英文版）》 |2020年第9期|2239-2246|共8页
作者
LIU Min-min; LI Ya-lun; LI Guang-cun; DONG Tian-tian; LIU Shi-yang; LIU Pei; WANG Qing-guo;
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Key Laboratory of Food Processing Technology and Quality Control in Shandong Province College of Food Science and Engineering Shandong Agricultural University Tai'an 271018 P.R.China;

Key Laboratory of Food Processing Technology and Quality Control in Shandong Province College of Food Science and Engineering Shandong Agricultural University Tai'an 271018 P.R.China;

Institute of Vegetables and Flowers Chinese Academy of Agricultural Sciences/Key Laboratory of Biology and Genetic Improvement of Tuber and Root Crop Ministry of Agriculture and Rural Affairs Beijing 100081 P.R.China;

Key Laboratory of Food Processing Technology and Quality Control in Shandong Province College of Food Science and Engineering Shandong Agricultural University Tai'an 271018 P.R.China;

Key Laboratory of Food Processing Technology and Quality Control in Shandong Province College of Food Science and Engineering Shandong Agricultural University Tai'an 271018 P.R.China;

Key Laboratory of Food Processing Technology and Quality Control in Shandong Province College of Food Science and Engineering Shandong Agricultural University Tai'an 271018 P.R.China;

Key Laboratory of Food Processing Technology and Quality Control in Shandong Province College of Food Science and Engineering Shandong Agricultural University Tai'an 271018 P.R.China;

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Overexpression of StCYS1 gene enhances tolerance to salt stress in the transgenic potato (Solanum tuberosum L.) plant

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