Plant Biology Division, The Samuel Roberts Noble Foundation, Ardmore, Oklahoma 73410 (G.W., L.T., X.D., J.H., P.X.Z., R.A.D.); and Center for Novel Agricultural Products, Department of Biology, University of York, York YO10 5YW, United Kingdom (N.A., P.B., A.K.)(2008-09-05時点)
