Image-based phenotyping for non-destructive screening of different salinity tolerance traits in rice

Rice

Table 2 Shoot Na ⁺ and K ⁺ accumulation and K ⁺ /Na ⁺ ratio of rice cv. Fatmawati and IR64 at 20 d after application of a high salt stress (100, 150 and 200 mM NaCl)

Cultivar	Salt stress (mM NaCl)	Na⁺(mM)	K⁺(mM)	Shoot K⁺/Na⁺
Fatmawati	0	1.3 ± 0.1	265.3 ± 5.5	208.3 ± 12.3 b
	100	3.8 ± 0.1	326.1 ± 8.2	85.8 ± 2.1 c
	150	8.2 ± 1.0	346.3 ± 9.8	46.3 ± 6.1 d
	200	NA	NA	NA
IR64	0	0.6 ± 0.1	284.4 ± 4.8	465.2 ± 48.0 a
	100	5.9 ± 0.4	320.0 ± 7.0	55.4 ± 4.8 cd
	150	11.6 ± 1.1	325.7 ± 6.0	29.1 ± 2.5 d
	200	12.5 ± 1.3	366.4 ± 11.0	31.2 ± 2.9 d
F-test	Cultivar (C)	**	**	ns
	Salt stress (S)	**	**	**
	C x S	ns	ns	**

Values are the means ± SE (n = 7). NA = data not available due to the high level of senescence in this cultivar. Values in the same column followed by the same letter are not significantly different according to LSD (0.05) test. ** = significant at P < 0.01. ns = not significant.