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Updated: May 5, 2026

Plant Promoter Analysis: Identification and Characterization of Root Nodule Specific Promoter in the Common Bean
Published on: December 23, 2017
Expression of nodule-specific genes in Phaseolus vulgaris L
F Campos1, J Padilla, M Vázquez
1Departamento de Biología Molecular de Plantas, Centro de Investigación sobre Fijación de Nitrógeno, U.N.A.M., Cuernavaca, Apartado Postal 565-A, Morelos, Mexico.
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.
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