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.
Effects of three different photoperiods (12 h, 16 h, and 20 h) on the relative chlorophyll content of tomato leaves. The data represent the mean of at least three biological replicates. Different letters indicate significant differences (LSD) (α = 0.05).
