Synergistic responses of NHX, AKT1, and SOS1 in the control of Na^+ homeostasis in sweet sorghum mutants induced by ^(12)C^(6+)-ion irradiation

作     者：Wen-Ting Gu Li-Bin Zhou Rui-Yuan Liu Wen-Jie Jin Ying Qu Xi-Cun Dong Wen-Jian Li 

作者机构：Institute of Modern Physics Chinese Academy of Sciences 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2018年第29卷第1期

页      面：32-38页

核心收录：

学科分类：08[工学] 0827[工学-核科学与技术] 

基　　金：supported by the Science and Technology Service Network Initiative(STS)program of the Chinese Academy of Sciences(CAS)(KFJ-EW-STS-086) the National Natural Science Foundation of China(No.11275171) the CAS‘‘Light of West China’’ Program(Nos.29Y506020 and 29Y406020) the Youth Innovation Promotion Association of CAS(No.2015337) 

主　　题：12C6+-ion irradiation Sweet sorghum Salt stress NHX AKT1 SOS1 

摘      要：Sweet sorghum mutants induced by^(12)C(6+)-ion irradiation were planted under different soil salinity conditions to investigate the mechanisms maintaining the transport and spatial distribution of Na^+. The functions of the synergistic responses of NHX, AKT1, and SOS1 related to Na^+ accumulation were investigated in control(KFJT-CK) sorghum and KF1210-3 and KF1210-4 mutants. The results indicated that the NHX, AKT1, and SOS1 proteins in sweet sorghum are mainly involved in the transport, exclusion, and spatial distribution of Na^+,respectively. In addition to physiological parameters, we also measured the expression levels of NHX, AKT1, and SOS1 genes. The experimental results indicated that 150 m M Na Cl induced marked increases in the transcripts of NHX and SOS1 after 8 and 12 h in the KF1210-3,KF1210-4, and KFJT-CK cultivars. In contrast, however, a decrease in AKT1 was observed. On the basis of our results, we propose a model in which cooperation amongNHX, AKT1, and SOS1 facilitates Na^+ homeostasis in sweet sorghum in response to an increase in salt concentration. Accordingly, study of the regulatory mechanisms in sweet sorghum generated by carbon ion irradiation is essential for the selection of salt-tolerant cultivars.