Fig. 4. Effect of glucose and NO^-₃ additions on in vivo NRA in leaves of Acala cotton grown in 0.1 mM NO^-₃ at 30/20°C light/dark temperatures. Leaf samples were harvested either at the beginning of light period (A) or after 1 h exposure to light (B). Vertical lines above the bars show the standard error of means of three replicates. In each panel, bars with the same letter are not significantly different as determined by Duncan's multiple range test (P = 0.05)

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