Fig. 4
From: A new allele for aluminium tolerance gene in barley (Hordeum vulgare L.)
Citrate and malate efflux from the root apices of the barley varieties. a Citrate efflux was measured in presence of 30 μM AlCl3 with and without an overnight pre-treatment in 10 μM AlCl3. b Malate efflux measured in the presence of 30 μM AlCl3 without pre-treatment. ET8 is an Al-tolerant wheat line used as a positive control for malate efflux. Data show means and SE (n = 4)