Table 2.

Elemental distribution in root nodules of Psoralea pinnata (L.) harvested from dry-upland conditions

Element	Elemental concentrations in upland nodules (μg g DW−1)
	Outer cortex	Middle cortex	Inner cortex	Medulla
P	900 ± 90b	800 ± 40b	1,300 ± 170a	1,300 ± 60a
Ca	20,000 ± 900a	2,500 ± 170b	800 ± 40c	1,200 ± 50bc
K	3,100 ± 190b	4,600 ± 50a	4,300 ± 340a	4,900 ± 59a
S	1,400 ± 30c	1,200 ± 60c	2,400 ± 230b	3,200 ± 380a
Cl	1,400 ± 110a	900 ± 20b	800 ± 90b	400 ± 40c
Fe	56 ± 8b	18 ± 1c	41 ± 6b	200 ± 9a
Mo	2.0 ± 0.3b	4 ± 1a	3.0 ± 0.3ab	5 ± 1a
Zn	84 ± 6a	62 ± 2b	58 ± 5b	36 ± 3c
Ni	8 ± 1bc	17 ± 3a	3.0 ± 0.3c	13 ± 2ab
Br	21 ± 2a	5.0 ± 0.4b	4 ± 0.3b	5 ± 1b
Ti	160 ± 20a	13 ± 1b	2.0 ± 0.1b	10 ± 1b
Si	1,500 ± 130a	900 ± 90b	1,300 ± 200ab	1,600 ± 400a
Ba	30 ± 9a	8 ± 1b	10 ± 2b	6 ± 1b
Mn	-	2.0 ± 0.2b	3 ± 1b	26 ± 5a
Cu	14 ± 1a	2.0 ± 0.2b	5.0 ± 0.2b	15 ± 2a
As	4.0 ± 0.4a	4.0 ± 0.4a	4 ± 1a	4 ± 2a
Zr	15 ± 2a	2.0 ± 0.3b	4 ± 0.3b	4 ± 1b
Sr	82 ± 9a	19 ± 1b	12 ± 1b	16 ± 4b
Rb	19 ± 2b	29 ± 4a	26 ± 4a	22 ± 0ba
Y	5 ± 1a	3.0 ± 0.3a	2.0 ± 0.2a	4.0 ± 0.4a

Mean (± S.E.) values followed by dissimilar letters in a row are significantly different at P < 0.05

− not detected or below detection