Fig 3.

Increases in (a) tryptophan (Trp) concentration and (b) photosynthetic rates of transgenic F₃ plants from four crop–weed (Oryza sativa f. spontanea and Oryza sativa) hybrid lineages. Closed columns indicate genetically engineered (GE) plants and open columns indicate non-GE plants. The four crop–weed hybrid lineages are designated WH1, WH2, WH3, and WH4. Means and SE are based on n = 3 leaf samples for Trp and n = 3 plants for photosynthesis. +, P < 0.1; *, P < 0.05; **, P < 0.01 (t-tests with Bonferroni corrections). Error bars represent ± SE.