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Stomatal conductance, gs (A); internal [CO2], Ci (B); SPAD value (C) and net photosynthesis, Pn (D) of Kandelia obovata treated with different salt concentrations and with 100 µM sodium nitroprusside (SNP, a NO donor), hemoglobin (Hb, a NO scavenger), or Nω-nitro- l-arginine methyl ester (l-NAME, a NO synthase inhibitor). Mean (± SD) was calculated from three replicates for each treatment. Bars with different letters are significantly different at p ≤ 0.05, applying Tukey’s HSD test.
