1. Institute of Plant Sciences, University of Bern, CH–3013 Bern, Switzerland (A.P., G.T., S.A., I.A., S.H.); Institute of Organic Chemistry and Center of Molecular Biosciences, University of Innsbruck, A–6020 Innsbruck, Austria (S.M., T.M., K.-H.O., B.K.); and Department of Biology, University of North Carolina, Chapel Hill, North Carolina 27599 (J.-Y.Y., S.J.L.)