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Effect of different levels of sodium chloride (NaCl), salicylic acid (SA), and interaction between NaCl and SA on the ratio of chlorophyll a to chlorophyll b (A), and the ratio of total chlorophyll to carotenoids (B) of Salvia coccinea. Bars within a chart with the same lower- case letter are not significantly different at p ≤ 0.05. Values represent the means of three replications ± standard deviations.
