Table 1.

Concentration of As, Rb (a phloem marker) and Sr (a xylem marker) in rice grains pulsed with arsenate for 5 days during grain fill and harvested at maturity (20 DPA), compared to negative and positive controls.

As Species	As (mg·L−1)	Timing of 5-day pulse (DPA)	μg·g−1
			As	Rb	Sr
Negativeb	0		0.3 (0.2)	2.8 (1.4)	0.7 (0.5)
Positive	25	8	47.2 (2.0)	9.42 (1.9)	1.27 (0.1)
As V	25	0a	5.5 (2.4)	287.3 (142.6)	116.3 (15.8)
	25	5	4.0 (0.7)	76.5 (28.2)	34.1 (10.2)
	25	10	9.2 (5.0)	60.0 (24.1)	9.3 (4.4)
	25	15a	8.2 (2.7)	20.5 (0.6)	1.4 (0.5)
As V	100	0	7.7 (1)	62.3 (8.0)	7.6 (2.7)
	100	5	4.7 (2.2)	13.2 (3.4)	1.6 (0.9)
	100	10	22.7 (0.5)	36.0 (6.8)	2.7 (1.0)
	100	15a	17.0 (8.50)	20.2 (8.4)	1.0 (0.3)

Data are mean (± SD), where N=3.

^aN=2,

^bN=6