Fig. 4.

Representative photographs of transgenic and control barley plants harvested from soil experiments. Plants were grown for 6 d in an acid soil and the same soil amended with lime as indicated. (A) ‘Golden Promise’, the Al³⁺-sensitive parental cultivar; (B) ‘Dayton’, an Al³⁺-tolerant cultivar; (C) Hv:T2_33A_null is a null (non-transgenic) segregant line; (D) Hv:T2_33A is a T₂ transgenic line over-expressing HvAACT1. Note that Hv:T2_33A_null and Hv:T2_33A are sister lines. The scale bar represents 10 cm.