Table 2.

Sodium–potassium ratio (derived from H₂O values, mmol kg⁻¹) in leaves of the non-halophytic hosts A. tortilis, C. comosum and H. persicum the halophytic hosts T. nilotica, A. halimus and N. retusa and the respective P. acaciae hemi-parasites on them.

Non-halophytic	Na/K	Halophytic	Na/K
A. tortilis		T. nilotica
Leaves	0.37	Young shoots	0.65
P. acaciae		P. acaciae
Old leaves	0.069	Old leaves	2.46
Middle-aged leaves	0.056	Middle-aged leaves	1.81
Young leaves	0.056	Young leaves	1.06
C. comosum		A. halimus
Shoots	0.77	Leaves	5.90
P. acaciae		P. acaciae
Old leaves	0.41	Old leaves	4.31
Middle-aged leaves	0.40	Middle-aged leaves	2.26
Young leaves	0.37	Young leaves	1.75
H. persicum		N. retusa
Shoots	1.36	Leaves	3.30
P. acaciae		P. acaciae
Old leaves	1.10	Old leaves	2.45
Middle-aged leaves	0.92	Middle-aged leaves	1.54
Young leaves	0.68	Young leaves	0.82