Elevated glutathione biosynthetic capacity in the chloroplasts of transgenic tobacco plants paradoxically causes increased oxidative stress. - Creissen,G..; Firmin,J..; Fryer,M..; Kular,B..; Leyland,N..; Reynolds,H..; Pastori,G..; Wellburn,F..; Baker,N..; Wellburn,A..; Mullineaux,P.. (Plant Cell, 1999)