T-DNA Tagging-Based Gain-of-Function of OsHKT1;4 Reinforces Na Exclusion from Leaves and Stems but Triggers Na Toxicity in Roots of Rice Under Salt Stress.

Blade/sheath 22 Na ratios of 3rd, 4th and 5th leaves showed a trend of lower 22 Na allocation in leaf blades of O/E plants, supporting that O/E plants exhibit superior capacity for the blockage of 22 Na + transfer to leaves ( Figure 3 b). 22 Na tracer analyses also led to the detection of significantly higher Na + uptake rates (approximately a 2-fold increase) in the roots of O/E plants than others ( Figure 3 c). 2.3.

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In younger leaves (5th to 8th), K concentrations of O/E plants showed an increasing trend or remained unchanged when compared with WT plants ( Figure 2 b).

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