title: Expression of nodule-specific genes in Phaseolus vulgaris L.
abstract: The identification of some nodule-specific host proteins (nodulins) from common bean (Phaseolus vulgaris L.), a tropical ureide-transporting legume, is described. Particularly, the existence and developmental expression of several abundant nodule-specific transcripts of P. vulgaris are shown, including leghemoglobin, nodulespecific uricase and a group that in vitro translates into a cluster of about 30 kDa products. The expression pattern of nodulins in effective (Fix(+)) nodules compared to ineffective (Fix(-)) ones is also presented. The modified expression of main nodulins observed between these nodules indicates that different levels and/or factors associated with their regulation are involved. The intracellular infection by Rhizobium as a decisive step in the induction of some P. vulgaris nodulins is discussed.
authors.affiliation: Departamento de Biología Molecular de Plantas, Centro de Investigación sobre Fijación de Nitrógeno, U.N.A.M., Cuernavaca, Apartado Postal 565-A, Morelos, Mexico.
authors.forename: F
authors.initials: F
authors.lastname: Campos
authors.forename: J
authors.initials: J
authors.lastname: Padilla
authors.forename: M
authors.initials: M
authors.lastname: Vázquez
authors.forename: J L
authors.initials: JL
authors.lastname: Ortega
authors.forename: C
authors.initials: C
authors.lastname: Enríquez
authors.forename: F
authors.initials: F
authors.lastname: Sánchez