Table 1.

Physiological measurements of infected and non-infected susceptible sunflower plants.

Treatment/DAP		23	31	36	51
Carbon assimilation (μmol m-2 s-1)	Control	11.29 ± 0.66l	12.20 ± 0.74	14.53 ± 0.80	11.74 ± 1.94
	O. cumana infected	13.22 ± 0.84l	11.27 ± 1.05	10.86 ± 1.48	9.76 ± 1.30
Stomatal conductance (mol m-2 s-1)	Control	0.40 ± 0.02 l	0.30 ± 0.02	0.41 ± 0.04	0.24 ± 0.06
	O. cumana infected	0.37 ± 0.04 l	0.23 ± 0.02	0.29 ± 0.06	0.19 ± 0.03
Transpiration (mmol m-2 s-1)	Control	6.74 ± 0.21 l	4.79 ± 0.34	6.56 ± 0.46	4.12 ± 1.00
	O. cumana infected	6.28 ± 0.40 l	3.8 ± 0.30	4.78 ± 0.76	3.38 ± 0.46
Non-photochemical quenching	Control	2.46 ± 0.22 l	2.32 ± 0.17	2.72 ± 0.26	2.16 ± 0.15
	O. cumana infected	2.12 ± 0.16 l	2.52 ± 0.86	2.63 ± 0.39	2.32 ± 0.20
Relative water content (%)	Control	75.61 ± 2.42l	79.35 ± 5.01	86.84 ± 7.50	92.67 ± 3.83
	O. cumana infected	72.79 ± 1.41l	79.31 ± 1.07	85.44 ± 4.30	91.33 ± 2.12
Chlorophyll content (mg l-1)	Control	0.03 ± 0.002l	0.04 ± 0.004	0.04 ± 0.003	0.04 ± 0.002
	O. cumana infected	0.03 ± 0.001l	0.04 ± 0.002	0.04 ± 0.001	0.03 ± 0.001

Orobanche cumana tubercles appear first in measurements done 31 DAP. Carbon assimilation, stomatal conductance, transpiration, and non-photochemical quenching include eight replications; relative water content, and chlorophyll content include four replications. Means comparison was done using one -way analysis of variance with Student’s t-test (α < 0.05). The result represents the mean ± SE.