Department of Botany and Plant Sciences and Center for Plant Cell Biology, University of California, Riverside, California 92521 (F.B., J.S., Z.Y.); Department of Biology, Wake Forest University, Winston-Salem, NC 27109 (S.R.B., G.K.M.); and Plant Functions Laboratory, RIKEN, Wako, Saitama 351–0198, Japan (T.A.)(2004-04-01時点)