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Figure 4 | SpringerPlus

Figure 4

From: Root anoxia effects on physiology and emissions of volatile organic compounds (VOC) under short-and long-term inundation of trees from Amazonian floodplains

Figure 4

a-f Mean values averaging over 5 minutes during day time (Daytime averages) for assimilation (A) in μmol m-2 s-1, transpiration (Tr) in mmol m-2 s-1, stomatal conductance (gs) in mm s-1and internal CO 2 concentration (Ci) in ppm under maximal photon flux density for three replicates of Garcinia macrophylla, Hevea spruceana, Hura crepitans, Pouteria glomerata and Pseudobombax munguba under nonflooded conditions (n = 66–142 per day) ± standard deviation (SD) and after two months and three weeks inundation (n = 142 per day) ± standard deviation (SD). Standard emission factors (Es) for isoprene in the case of Garcinia macrophylla from igapó, for monoterpenes in the case of Hevea spruceana from igapó, for methanol in the case of Garcinia macrophylla, Hura crepitans and Pseudobombax munguba and for acetone in the case of Hevea spruceana are given in μg g-1 h-1 under nonflooded conditions (n = 142 per day) and after two months and three weeks inundation (n = 142 per day) ± SD. Differences between nonflooded (grey) and flooded conditions (white) were tested with ANOVA and the Tukey Test. When the P-value < 0.01 the F ratio is significant (*), when the P-value < 0.001 the F ratio is very significant (**) and when the P-value < 0.0001 the F ratio is highly significant (***).

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