Table 2.

Cadmium concentrations in shoot and root tissues (μg g⁻¹ DW) and in xylem sap (μg l⁻¹) of the low-Cd-accumulating japonia cultivar ‘Sasanishiki’ and the high-Cd-accumulating indica cultivar ‘Habataki’ cultivated with the moderately Cd-polluted paddy soil under intermittent flooded conditions

	Cultivar		Ratioa
	‘Sasanishiki’	‘Habataki’	‘Habataki’/‘Sasanishiki’
Brown rice	0.30±0.03	1.57±0.14	5.2*
Spikelets	0.37±0.05	2.20±0.31	5.9*
Upper leaf blades	0.22±0.01	0.53±0.05	2.4*
Lower leaf blades	0.15±0.01	0.11±0.02	0.7
Stems	0.99±0.09	3.11±0.37	3.1*
Xylem sap	5.1±0.4	21.9±4.7	4.3*
Roots	18.2±1.20	17.0±3.07	0.9

Data are presented as means with SD (n=4). Xylem sap was collected at the heading stage.

^aAsterisks represent significant difference between each value of two cultivars tested by Student's t test (P <0.05).