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. 2017 Jan 10;7:2068. doi: 10.3389/fpls.2016.02068

FIGURE 4.

FIGURE 4

Effect of P. fluorescens RG11 on the levels of endogenous melatonin and its intermediates in the roots of Red Globe plantlets under salt stress conditions. E+, plants treated with RG11; E-, plants not treated with RG11. Changes in metabolite levels were calculated as follows: (E+/E-) – 1. Each data point represents the mean of 12 plants for each treatment ± standard deviation. Data with asterisks were significantly different from the E- plants at each time point (P < 0.05; Student’s t-test).