Fig. 6
From: Carbon nanotubes in the holding solution stimulate flower opening and prolong vase life in carnation
Leaf total phenolic and total flavonoid contents as well as IC 50 value (the concentration of antioxidants, stimulating 50% inhibition of free radical activity) during vase life of three cut carnation cultivars (A, B, C: Grand Slam; D, E, F: White liberty; G, H, K: Kirsi; Experiment 2). The holding solution included single- or multi- walled carbon nanotubes (SWCNTs and MWCNTs, respectively) at an optimum for vase life concentration (data in Fig. 1). The employed concentration was 10 (cv. White liberty) or 40 (cvs. Grand slam and Kirsi) mg L−1 for SWCNTs, while it was 40 (cv. White liberty) or 80 (cvs. Grand slam and Kirsi) mg L−1 for MWCNTs. Values are the mean of 4 replicates ± sem. For total phenolic and total flavonoid contents, gallic acid equivalent (GAE) and quercetin equivalent (QUE) were expressed per fresh weight (FW) basis, respectively. Statistics are provided in Additional file 2: Tables S25–S33