IO-» 5«I0 -5 10-* 5«I0'« 10"' 

 MOLS OF KCN 



5 1 10* I0" 6 5 1 10" 



MOLS OF N«N, 



10'' 5«I0' 10"* 5»I0« IO-» 

 MOLS OF K IODOACETATE 



10 s 5»I0» I0 ! 

 K MALONATE 



Figure 22. Effects of inhibitors on respiration rate and bromide absorp- 

 tion by abscised barley roots. Upper left: The effect of cyanide on bromide 

 absorption from KBr solutions initially o.ooiiV and 0.025 N with respect 

 to Br and on the gas exchange from solutions initially 0.005^. Upper right: 

 The effect of azide on bromide absorption from KBr solutions initially 

 0.00 iN and 0.025 N. Lower left and lower right: The effect of K-iodoace- 

 tate and K-malonate, respectively, on bromide absorption and the gas ex- 

 change from KBr solutions initially 0.005./V. All solutions also contained 

 0.001 N KH L ,PO ( and had initial pH values of 4.7-5.7. The points on the 

 ordinates labeled "ace. ratio" represent internal Br concentrations expressed 

 as a percentage of the control equivalent to the initial external Br concen- 

 tration. — Machlis (49) 



