Figure 2.
Effect of three different photoperiods (12 h, 16 h, and 20 h) on tomato seedlings. After 20 days of treatment, the plant seedlings were photographed.
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.