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Overexpression of SOS Genes Enhanced Salt Tolerance in Sweetpotato 被引量:7
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作者 GAO Shang YUAN Li +3 位作者 ZHAI Hong LIU Cheng-long HE Shao-zhen LIU Qing-chang 《Journal of Integrative Agriculture》 SCIE CSCD 2012年第3期378-386,共9页
The production of transgenic sweetpotato (cv.Xushu 18) plants exhibiting enhanced salt tolerance using salt overly sensitive (SOS) genes was achieved through Agrobacterium tumefaciens-mediated transformation.A.tum... The production of transgenic sweetpotato (cv.Xushu 18) plants exhibiting enhanced salt tolerance using salt overly sensitive (SOS) genes was achieved through Agrobacterium tumefaciens-mediated transformation.A.tumefaciens strain EHA105 harbors a binary vector pCAMBIA3301 with SOS genes (SOS1,SOS2 and SOS3) and bar gene.Selection culture was conducted using 0.3 mg L^-1 phosphinothricin (PPT).A total of 40 plants were produced from the inoculated 170 cell aggregates via somatic embryogenesis.PCR analysis showed that 37 of the 40 regenerated plants were transgenic plants.The in vitro assay demonstrated that superoxide dismutase (SOD) and proline were significantly more accumulated and malonaldehyde (MDA) was significantly less accumulated in 21 transgenic plants than in control plants when they were exposed to 86 mmol L^-1 NaCl.Salt tolerance of these 21 plants was further evaluated with Hoagland solution containing 0,51,86,and 120 mmol L^-1 NaCl in the greenhouse.The results indicated that 6 of them had significantly better growth and rooting ability than the remaining 15 transgenic plants and control plants.Expression of SOS genes in the 6 salt-tolerant transgenic plants was demonstrated by RT-PCR analysis.This study provides an alternative approach for improving salt tolerance of sweetpotato. 展开更多
关键词 agrobacterium tumefaciens sweetpotato salt tolerance sos transgenic plant
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