Fig. 1
From: Effect of nanoparticles on red clover and its symbiotic microorganisms
Plant weight and flowers. a Red clover plant dry weight divided in shoot (grey) and root (white), and b number of flowers per pot at the end of the 3 month exposure for control, TiO2 (P25, non-nanomaterial NNM), MWCNT, CeO2 NPs, and ZnSO4·7H2O. The number behind the treatment name is the nominal concentration in mg kg−1. Error bars show the standard deviations (n = 7). Capital letters show significant differences for shoot biomass and number of flowers, and small letters for root biomass compared to the control plants (p ≤ 0.05). The two blocks of starting time were included in the statistical model