. 2017 Jun 22;2017:6201048. doi: 10.1155/2017/6201048

Table 2.

Mean values and standard deviation of heavy metals (Cu, Zn, Pb, and Cr) bioaccumulation factor (BAF) (metals concentration ratio of water-root; water-rhizome; water-belowground parts, roots + rhizome; and water-shoot) in P. australis.

Metals		Spring	Summer	Autumn	Winter
Metals		Mean ± SD	Mean ± SD	Mean ± SD	Mean ± SD
Cu	Water-root	0.001 ± 0.000	0.007 ± 0.005	0.007 ± 0.003	0.015 ± 0.011
	Water-rhizome	0.035 ± 0.169^a	0.043 ± 0.038^a	0.047 ± 0.020^a	0.006 ± 0.004^b
	Water-belowground parts	0.036 ± 0.175	0.050 ± 0.044	0.054 ± 0.023	0.022 ± 0.015
	Water-shoot	0.004 ± 0.001	0.005 ± 0.007	0.004 ± 0.002	0.003 ± 0.002
Zn	Water-root	0.006 ± 0.007^a	0.001 ± 0.001^b	0.001 ± 0.001^b	0.005 ± 0.001^ab
	Water-rhizome	0.005 ± 0.002	0.005 ± 0.004	0.004 ± 0.002	0.003 ± 0.000
	Water-belowground parts	0.011 ± 0.006^a	0.007 ± 0.005^b	0.005 ± 0.003^ab	0.008 ± 0.0023^b
	Water-shoot	0.003 ± 0.002	0.001 ± 0.001	0.001 ± 0.000	0.001 ± 0.000
Pb	Water-root	0.003 ± 0.001	0.006 ± 0.003	0.001 ± 0.000	0.010 ± 0.005
	Water-rhizome	0.007 ± 0.003^a	0.016 ± 0.011^b	0.012 ± 0.004^b	0.001 ± 0.000^c
	Water-belowground parts	0.013 ± 0.003	0.011 ± 0.001	0.010 ± 0.000	0.011 ± 0.001
	Water-shoot	0.001 ± 0.000	0.001 ± 0.000	0.001 ± 0.000	0.001 ± 0.000
Cr	Water-root	0.046 ± 0.014^a	0.010 ± 0.004^b	0.004 ± 0.001^b	0.045 ± 0.007^ab
	Water-rhizome	0.037 ± 0.009^a	0.007 ± 0.007^b	0.009 ± 0.002^ac	0.045 ± 0.009^abc
	Water-belowground parts	0.083 ± 0.023^a	0.017 ± 0.010^b	0.013 ± 0.004^b	0.091 ± 0.014^ab
	Water-shoot	0.004 ± 0.001	0.001 ± 0.001	0.001 ± 0.000	0.004 ± 0.002

Values are the means of six replicates ± standard deviation. Significant difference between seasons (within the same tissue) is showed by small letter.