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Relative growth rate and tissue Na+ for hydroponically grown rice. (a) Relative growth rate (RGR, % day−1) of 5-week-old rice plants exposed to standard medium (SM), and 60mM Na+. (b) Root Na+ content of plants grown in 0K and 60mM NaCl conditions. (c) Shoot Na+ content of plants grown in 0K and 60mM NaCl conditions. *Significant difference by t-test at a probability level of P<0.05 between each genotype and its respective wild type.
