Figure 5.

Effect of tissue K concentration on infection by Blumeria graminis and Rhynchosporium commune. (a, e) Number of barley leaf segments (in % of total number of inoculated leaf segments) showing symptoms after inoculation with B. graminis (a) or R. commune (e). (b–d) Number of B. graminis colonies on segments derived from tip (b), middle (c), or base (d) of the second leaf. (f–g) Length of R. commune lesions on segments derived from tip (f), middle (g), or base (h) of the second leaf. Leaf segments were harvested from barley plants grown for 14 days in control (black symbols) or −K (open symbols) media. Means (±SE) from three replicate experiments are shown (n = 3)