As one of main abiotic stresses in nature,salt stress does great harm to plants,and seriously affect plant growth and development.Simultaneously,the crops cultivated in the saline land undergo a wide range of yield decline.To excavate salt-tolerance gene,we cloned the cDNA of S-adenosyl-L-methionine synthetase gene from Gossypium hirsutum by RACE and RT-PCR,which was named GhSAMS,with the cDNA full length of 1 576 bp,ORF of 1 182 bp,and coding 393 amino acid residues.Bioinformatics analysis showed GhSAMS ha...