. 2011 May;12(5):408–418. doi: 10.1631/jzus.B1000291

Table 2.

Concentration of ⁶⁸Zn in the dried tissues of two rice genotypes during supplying ⁶⁸ZnSO₄ for 8 d at seedling stage

Sampling time (d)	Concentration of ⁶⁸Zn (mg/kg)
	IR64				IR68144
	Old leaves	New leaves	Stem	Root	Old leaves	New leaves	Stem	Root
2	0.63^a	0.32^a	13.00^a	16.48^a	2.25^a	0.98^a	18.44^a	15.33^a
4	0.42^b	2.35^b	15.18^b	16.74^a	1.75^b	2.71^b	19.81^a	15.24^a
6	0.25^c	5.58^c	22.17^c	18.54^b	1.54^b	7.00^c	19.55^a	14.68^b
8	0.13^d	9.85^d	31.03^d	19.10^b	1.33^c	11.69^d	15.26^b	14.41^b

Plants were grown in normal nutrient solution up to 30 d (seedling stage), then transferred into nutrient solution with 1.0 µmol/L ⁶⁸ZnSO₄. Data represent a mean of three plants. Different superscript letters at the same column indicate statistical significance at P<0.05