Study the effect of NaCl stress on the expression of the AtPropep family in Arabidopsis thaliana

The protein product of the recently discovered AtPropeps family has very important role in the immune system in Arabidopsis thaliana. The final product of this family is eight small peptides named AtPropep۱ to AtPropep۸ and perceived by AtPEPR۱ and AtPEPR۲ receptors which are resident in the plasma membrane. It is identified that the immune system in Arabidopsis thaliana is fine-tuned through the cell to cell movement of these signaling peptides. So far, there is a very limited research about AtPropep family and their corresponding receptors was done in response to NaCl treatment. In the current research, four weeks old A. thaliana was treated with ۳۰۰mM NaCl in three time course including one, six and ۲۴ hours. Distilled water was added to the control plants. The gene analysis showed that the response of this gene family is totally different from each other. It is identified that AtPropep۱ and AtPropep۳ were highly induced in response to NaCl treatment. The rate of gene induction was the highest six hours after treatment. Atpropep۳ gene induction was more than AtPropep۱. In addition, compared to the control plants, we observed that ۲۴ hours after treatment, AtPEPR۱ is induced in response to NaCl treatment. Furthermore, AtPEPR۲ was not induced in response to NaCl treatment. The result of this study showed that other members of this family were not induced in response to NaCl treatment, indicating that each member of this family has specific role. In conclusion, the result of this study showed that it is possible to apply members of this family against salt stress.

کلیدواژه ها:

Salt treatment ، Receptor ، peptide ، gene expression ، signal