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.
Cleared primary root tips of Cactaceae species from the four subfamilies. (A, B) Trichocereus angelesiae, Cactoideae; (C, D) Opuntia streptacantha, Opuntioideae; (E) Maihuenia patagonica, Maihuenioideae; and (F) Pereskia aculeata, Pereskioideae. The approximate age of the seedlings at the time of the root excision was (A) <1 dpg; (B, C) 2 dpg; and (D–F) 10 dpg. (A, C, E, F) Growing roots; (B, D) roots that terminated growth. Scale bar = 100 µm.
