Fig. 2. Seed weights (g) for individual plants of two bush bean (P. vulgaris L.) lines, ‘S156’ (O3-sensitive) and ‘R156’ (O3-tolerant), grown in OTCs (CF and NF), and non-chambered AA plots. Plants harvested upon pod maturity at 87 DAS. The bars show meansS.E. (standard error) values (at P