Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Variations of state transition amplitude as measured by non-photochemical quenching of fluorescence associated to state transition (NPQST; (a)) and photosystem II quantum yield (FV/FM; (b)) in the tropical (triangles), mid-latitude (squares) and high-latitude (circles) marine Synechococcus strains during 6 days of cold stress (n⩾4).
