1. School of Biological Sciences, Washington State University, Pullman, Washington 99164–4236 (G.E.E.);
2. Division of Plant Industry, Commonwealth Scientific and Industrial Research Organization, Box 1600, Canberra, Australian Capital Territory 2601, Australia (R.T.F., M.D.H.); and
3. Photobioenergetics Group, Research School of Biological Sciences, Australian National University, Box 3252, Weston Creek, Australian Capital Territory 2611, Australia (C.B.O.)