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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)

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

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 **
  1. 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.