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.
Autoradiographs of (A) willow and (B) C. blumei leaves exposed to 14CO2 for 5 min and allowed to transport for a further 55 min. Leaves were flash frozen and lyophilized. Autoradiographs were used as negatives; therefore, white indicates the presence of radiolabel. (Bar = 2 mm.)
