Fig. 2
From: Hyperspectral imaging to characterize plant–plant communication in response to insect herbivory
Average (error bars = standard error) phytocompound levels after maize plants had been divided into four groups (See Fig. 1 for treatment descriptions): “Control”: baseline data from T1 and T2 plants, and all additional data acquired from T2 plants, “Herbivory”: all data acquired from T1, T3A, and T4A plants after onset of herbivory, “Air only”: all data acquired from T3B plants after onset of herbivory, and “Air and root”: all data acquired from T4B plants after onset of herbivory. Different letters denote significant difference at the 0.05 level. Phytocompounds: [auxins (in particular indole-3acetic acid (IAA)), hydrogen peroxide (H2O2), jasmonic acid (JA), 12-oxo-phytodienoic acid (OPDA), salicylic acid (SA), chlorophyll a (Chl_a) and b (Chl_b), and carotenoids (Carot)]. a IAA, b JA, c H2O2, d SA, e OPDA, f chlorophyll a, g chlorophyll b, h carotenoids