Synechococcus Under Stress: Contrasting Physiological and Transcriptional Responses to Salinity and Temperature in Marine Versus Euryhaline Strains.

ABSTRACT: Temperature and salinity are key environmental drivers that constrain growth and distribution of marine cyanobacteria, yet their combined physiological effects remain unexplored. We analysed the physiological and transcriptional responses of two Synechococcus strains, the marine RS9907 and euryhaline WH5701, across a salinity gradient (18-50 PSU) under optimal (28°C-30°C) and low temperature conditions (15°C-20°C). Growth and photosynthetic efficiency (F_V/F_M) declined under salinity stress (18 PSU for RS9907 and 50 PSU for WH5701), relative to typical marine conditions (36 PSU). RS9907 maintained the photosynthetic electron transport rate under salt stress and the F_V/F_M under cold conditions more effectively than WH5701. Salinity induced a strong

SUBMITTER: Escribano-Gomez I 

PROVIDER: S-EPMC12834511 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature