Salinity-stress-induced proteins in two nitrogen-fixing Anabaena strains differentially tolerant to salt.

摘要: Salinity altered the protein synthesis patterns in two cyanobacterial strains: Anabaena torulosa, a salt-tolerant brackish water strain, and sp. strain L-31, salt-sensitive freshwater strain. The response to salinity was very rapid, varied with time, found be correlated external salt (NaCl) concentration during stress. induced three prominent types of modification. First, several proteins inhibited, especially strain; second, certain significantly enhanced; third, specific set de novo by Proteins which were selectively synthesized or stress, tentatively called salt-stress proteins, confined an isoelectric pI range 5.8 7.5 distributed molecular mass 12 155 kilodaltons. These unique each their expression apparently regulated coordinately exposure In most salt-stress-induced transient nature located mainly cytoplasm. A. evenly membrane cytoplasmic fractions persistent, being at high rates throughout period initial studies reveal that salinity-induced modification synthesis, as has been demonstrated higher plant species, also occurs cyanobacteria least some preferentially stress may important osmotic adaptation.