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.
(A and D) Citric acid exudation, (B and E) malic acid exudation and (C and F) succinic acid exudation of H. vulgare, B. napus and S. tuberosum grown in nutrient solution at two levels of P supply (P1 = 1 μM P, P50 = 50 μM P). Root exudates were collected after 15 days growth (A–C) and 28 days growth (D–F). Values are means ± SE of n = 8–9. Different letters indicate significant differences (P < 0.05) as shown by Tukey tests. NA, not available.
