Department of Plant Sciences, University of Oxford, Oxford OX1 3RB, United Kingdom (M.J.M., B.G., N.J.K., R.G.R., L.J.S.); Max-Planck-Institut für Molekulare Pflanzenphysiologie, 14476 Potsdam-Golm, Germany (S.O., A.R.F.); and Syngenta, Jealott’s Hill International Research Centre, Bracknell, Berkshire RG42 6EY, United Kingdom (C.J.B.) (At 2012-11-19)