Short-term effects of nitrate, nitrite and ammonium assimilation on photosynthesis, carbon partitioning and protein phosphorylation in maize. - Foyer,C..H..; Noctor,G..; Lelandais,M..; Lescure,J..C..; Valadier,M..H..; Boutin,J..P..; Horton,P.. (Plant Physiol., 1994)