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.
Diurnal change of normalized sap flux density (Js) of the freshly sprouted culms to the normalized Js of established culms in the leafless (A), leafing (B) and well-leaved period (C) of the freshly sprouted culms of B. vulgaris. In each sub-figure, data was averaged from six consecutive sunny days of three culm pairs. The X- and Y- error bars on each dot are standard deviations of the respective 6 days.
