Expression of ABA signaling transduction genes in S0-0 and S0-50
ABA signaling transduction related genes in S0-0 and S0-50 had similar expression patterns after PEG treatment (Figure 5C). The MsPYL5 and MsPYL6ABA receptors were significantly induced after one hour, then sharply decreased after PEG treatment for 3h. Expression of the other tested genes in ABA signaling transduction was gradually increased during PEG treatment. Most of them, such as MsPYL5 , MsPYL6 ,MsPYL7 , MsPYL9 , MsSnRK2.2 , MsABI1 andMsABF4 , were more highly expressed in S0-50 than in S0-0 under normal conditions, but showed no significant difference in expression level between S0-0 and S0-50 after PEG treatment. The expression level of the MsSOAR1 , a homology gene of Arabidopsis ABA signaling inhibitor, was significantly higher in S0-50 than in S0-0. The results indicated MsSOAR1 could play a key role in drought resistance of the S0-50 plant.