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.
Histograms for Pos values from root protoplasts. A, Rape roots were collected from 2- (upper histogram) or 3- to 5-d-old (lower histogram) plants. B, Wheat roots were collected from 3- (upper histogram) or 5-d-old (lower histogram) plants. C, Maize roots were collected from 2- (upper histogram) or 3- to 5-d-old (lower histogram) plants. n, Number of protoplasts in each class.
