Characterization of a Selenium-Tolerant Rhizosphere Strain from a Novel Se-Hyperaccumulating Plant Cardamine hupingshanesis

Table 4

Concentrations of Se speciations (Se⁴⁺, SeCys₂, SeMecys, and SeMet) in the supernatant and deposit. (The isolated strain, Suzhou 08+6, was grown in the culture medium with 1.5 mg Se L⁻¹).

Time	Se speciation concentrations in supernatant; (mg L^−1)				Se speciation concentrations in deposit; (mg kg^−1)
	Se^4+	SeCys2	SeMeCys	SeMet	Se^4+	SeCys2	SeMeCys	SeMet
1 h	1.54	—	—	—	*	*	*	*
2 h	1.57	—	—	0.02	*	*	*	*
4 h	1.52	—	—	—	—	—	1.77	—
6 h	0.03	—	—	—	0.37	14.09	—	—
8 h	0.08	—	—	—	—	22.20	—	—
10 h	0.06	—	—	—	—	12.26	3.54	—
12 h	0.07	—	—	—	—	22.05	—	—
24 h	0.07	—	—	—	0.19	7.06	—	—
28 h	0.11	—	—	—	0.10	12.19	—	—
32 h	0.08	—	—	—	0.20	11.92	—	—
36 h	0.07	—	—	—	0.23	7.42	—	—
48 h	0.07	—	—	—	—	2.64	—	—

—: below the detection limit; *: no sample.