Table 2 Summary of total arsenic and ratio of As (III) in rice tissues grown in different treatments (mean ± SE,n = 3)

Treatment	Rice compartment	Total As (mg/kg dry weight)	The ratio of As (III)(%)
As	Shoot	19.67	99.58 ± 1.15 A
As+nZnO10	Shoot	16.85	95.50 ± 2.03 B
As+nZnO20	Shoot	14.44	95.90 ± 2.35 B
As+nZnO50	Shoot	13.17	95.32 ± 3.01 B
As+nZnO100	Shoot	11.66	95.01 ± 2.85 B
As	Root	989.38	99.01 ± 6.03 a
As+nZnO10	Root	1084.75	98.06 ± 7.84 a
As+nZnO20	Root	1077.04	99.30 ± 10.10 a
As+nZnO50	Root	736.08	98.68 ± 5.32 a
As+nZnO100	Root	677.22	99.32±8.32 a