Expression of irrE in Deinococcus radiodurans can Enhance Salt Tolerance of Arabidopsis thaliana

As a global regulator,the irrE gene is responsible for extreme radiation resistance.irrE gene was introduced into Arabidopsis plants via agrobacterium-mediated transformation.The transgenic plants were selected and their salt tolerance was analyzed.The results showed that irrE gene could enhance salt tolerance in Arabidopsis thaliana,as well as increase the free proline content in transgenic plants under salt stress.The semi-quantitative RT-PCR analysis at transcriptional level showed AtNHX1 expression quantities rose in transgenic plants under salt stress.These results demonstrated the function of irrE in Arabidopsis thaliana is increasing the expression level of AtNHX1,thus enhancing salt tolerance of Arabidopsis thaliana.