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.
Box plot of data showing the range of steady-state nitrate electrode measurements for leaf cells in the light and dark. The horizontal boxes show the fifth and 95th percentiles, the median is shown as a solid line, the mean as a dotted line, and the bars show the maximum and minimum values.
