Comparison between the polypeptide profile of halophilic bacteria and salt tolerant plants.
Changes in the polypeptide profile induced by salt stress in halotolerant and halophilic bacteria, isolated from the Atacama desert (northern Chile), were compared with those in the cotyledons of Prosopis chilensis (Leguminoseae) seedlings, a salt tolerant plant. SDS-PAGE analyses show the presence of four predominant polypeptides, with molecular weights around 78, 70, 60 and 44 kDa respectively, both in bacteria and in cotyledons from P. chilensis seedlings raised under salt stress conditions. Moreover, the 60 and 44 kDa polypeptides seem to be salt responsive, since their concentration increases with increasing NaCl in the growth medium. Our results suggest a common mechanism for salt tolerance in prokaryotes and in eukaryotes.
Muñoz
G
G
Instituto de Biología, Universidad Católica de Valparaíso, Chile.
González
C
C
Flores
P
P
Prado
B
B
Campos
V
V
D000222:Adaptation, Physiological; D001419:Bacteria / Q000737:chemistry* / Q000302:isolation & purification; D001426:Bacterial Proteins / Q000737:chemistry*; D002677:Chile; D003889:Desert Climate; D015964:Gene Expression Regulation, Bacterial / Q000187:drug effects; D018506:Gene Expression Regulation, Plant / Q000187:drug effects; D008970:Molecular Weight; D010455:Peptides / Q000032:analysis*; D010940:Plant Proteins / Q000737:chemistry*; D010944:Plants / Q000737:chemistry*; D012639:Seeds / Q000737:chemistry / Q000187:drug effects; D012965:Sodium Chloride / Q000494:pharmacology*; D013045:Species Specificity; D014871:Water Microbiology
D001426:Bacterial Proteins; D010455:Peptides; D010940:Plant Proteins; D012965:Sodium Chloride