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.
Frost tolerance after cold acclimation. Box plot representation shows the regrowth of nine acclimated and nonacclimated Pooideae species after exposure to three freezing temperatures (−4°C, −8°C, and −12°C). Regrowth is scored on a scale from 0 to 9, where 0 is dead and 9 is undamaged. Significant differences in regrowth between acclimated and nonacclimated plants are indicated by asterisks (***, P ≤ 0.001; **, P ≤ 0.01; and *, P ≤ 0.05).
