Department of Plant Biology, Carnegie Institution, Stanford, California 94305 (P.Z., K.D., A.K., A.C., V.K., C.L., R.M., S.Y.R.); Boyce Thompson Institute for Plant Research, Ithaca, New York 14853 (A.P., L.A.M.); SRI International, Menlo Park, California 94025 (R.C., P.K., M.L.) (At 2010-06-03)