title: Photosynthesis and chloroplast genes are involved in water-use efficiency in common bean.
abstract: A recent proposal to mitigate the effects of climatic change and reduce water consumption in agriculture is to develop cultivars with high water-use efficiency. The aims of this study were to characterize this trait as a differential response mechanism to water-limitation in two bean cultivars contrasting in their water stress tolerance, to isolate and identify gene fragments related to this response in a model cultivar, as well as to evaluate transcription levels of genes previously identified. Keeping CO2 assimilation through a high photosynthesis rate under limited conditions was the physiological response which allowed the cultivar model to maintain its growth and seed production with less water. Chloroplast genes stood out among identified genetic elements, which confirmed the importance of photosynthesis in such response. ndhK, rpoC2, rps19, rrn16, ycf1 and ycf2 genes were expressed only in response to limited water availability.
authors.affiliation: División de Estudios de Posgrado e Investigación, Instituto Tecnológico de Roque, Celaya C.P. 38110, Guanajuato, Mexico.
authors.forename: Jorge E
authors.initials: JE
authors.lastname: Ruiz-Nieto
authors.affiliation: División de Estudios de Posgrado e Investigación, Instituto Tecnológico de Roque, Celaya C.P. 38110, Guanajuato, Mexico.
authors.forename: César L
authors.initials: CL
authors.lastname: Aguirre-Mancilla
authors.affiliation: Campo Experimental Bajío, Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias, Celaya C.P. 38110, Guanajuato, Mexico.
authors.forename: Jorge A
authors.initials: JA
authors.lastname: Acosta-Gallegos
authors.affiliation: División de Estudios de Posgrado e Investigación, Instituto Tecnológico de Roque, Celaya C.P. 38110, Guanajuato, Mexico.
authors.forename: Juan C
authors.initials: JC
authors.lastname: Raya-Pérez
authors.affiliation: Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Iztacala C.P. 54090, Estado de México, Mexico.
authors.forename: Elías
authors.initials: E
authors.lastname: Piedra-Ibarra
authors.affiliation: Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Iztacala C.P. 54090, Estado de México, Mexico.
authors.forename: Josefina
authors.initials: J
authors.lastname: Vázquez-Medrano
authors.affiliation: Campo Experimental Bajío, Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias, Celaya C.P. 38110, Guanajuato, Mexico. Electronic address: montero.victor@inifap.gob.mx.
authors.forename: Victor
authors.initials: V
authors.lastname: Montero-Tavera
mesh_terms: D000222:Adaptation, Physiological / Q000235:genetics; D018533:Biomass; D055864:Droughts; D007887:Fabaceae / Q000145:classification / Q000235:genetics* / Q000378:metabolism; D020869:Gene Expression Profiling; D018506:Gene Expression Regulation, Plant; D061125:Genes, Chloroplast / Q000235:genetics*; D017343:Genes, Plant / Q000235:genetics*; D010788:Photosynthesis / Q000235:genetics*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D013045:Species Specificity; D014867:Water / Q000378:metabolism*
chemical_list: D014867:Water
keywords: Phaseolus vulgaris; Suppressive subtractive hybridization; Transcription levels; Transcriptome; Water regimens