[1] Univ Missouri, Dept Biol, St Louis, MO 63121 USA
[2] Donald Danforth Plant Sci Ctr, St Louis, MO USA
[3] Chinese Acad Sci, Kunming Inst Bot, Kunming, Peoples R China
[4] Kansas State Univ, Dept Biochem, Manhattan, KS USA
[5] Kansas State Univ, Div Biol, Manhattan, KS USA