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.
Maximum efficiency of photosystem II (Fv/Fm) of Arabidopsis lyrata ssp. petraea seedlings (10 leaves) 2 days after sub-zero treatments. The Fv/Fm of inner leaves is defined as the central immature, inner whorl leaves and the outer leaves defined as the larger outer whorl mature leaves. Prior to treatment, plants were exposed to 2 °C for two days. The percent survival of the plants was assessed 16 days after exposure to sub-zero temperatures. n = 10 ± SE
