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.
Effective PSII quantum yield of maize leaves at 28 d after germination. Plants were cultivated under control (high-N) or low-N conditions. The asterisk indicates significant differences in comparison with L6 from high-N-grown plants. Fluorescence could not be measured in L7 from low-N-treated plants. nd, Not determined. All data points represent average from four plants ± sd.
