Table II.

Properties of xylem sap collected from control roots and from roots treated with HgCl₂ incubated in solutions containing RB

Treatment	Qv	Electrical Conductivity	Osmotic Potential	RB Concentration	Ce/Cba
	(m3 s−1) ∗ 1010	μS	MPa	(μg mL−1) ∗ 103	(%) ∗ 102
Control	6.12  ± 1.263 a	538.56  ± 22.076 b	−0.064  ± 0.0037 a	2.43  ± 0.205 b	1.22  ± 0.101 b
HgCl2	2.87  ± 0.610 b	797.87  ± 54.658 a	−0.062  ± 0.0054 a	5.00  ± 1.106 a	2.50  ± 0.563 a

Means ± se (n = 6) followed by different letters are significantly different at the 0.05 level.

^aC_e denotes RB concentration in the xylem sap, and C_b is RB concentration in the incubation solution.