The Common Bean ( Phaseolus vulgaris ) Basic Leucine Zipper (bZIP) Transcription Factor Family: Response to Salinity Stress in Fertilized and Symbiotic N2-Fixing Plants

Litzy Ayra, Mario Ramírez, Luis P. Íñiguez, Rosa Rodés, Eduardo Ortega and Georgina Hernández
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Litzy Ayra: Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Cuernavaca 62209, Morelos, Mexico
Mario Ramírez: Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Cuernavaca 62209, Morelos, Mexico
Luis P. Íñiguez: Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Cuernavaca 62209, Morelos, Mexico
Rosa Rodés: Laboratorio de Fisiología Vegetal, Facultad de Biología, Universidad de La Habana, La Habana 10400, Cuba
Eduardo Ortega: Laboratorio de Fisiología Vegetal, Facultad de Biología, Universidad de La Habana, La Habana 10400, Cuba
Georgina Hernández: Centro de Ciencias Genómicas, Universidad Nacional Autónoma de México, Cuernavaca 62209, Morelos, Mexico

Agriculture, 2018, vol. 8, issue 10, 1-16

Abstract: The basic leucine zipper (bZIP) transcription factor family regulates plant developmental processes and response to stresses. The common bean ( Phaseolus vulgaris ), an important crop legume, possesses a whole set of 78 bZIP ( PvbZIP ) genes, the majority of these (59%) are most highly expressed in roots and nodules, root-derived new organs formed in the rhizobia N 2 -fixing symbiosis. Crop production is highly affected by salinity in Cuba and other countries. In this work we characterized the adverse effect of salinity to common bean plants of the Cuban CC-25-9-N cultivar grown in fertilized (full N-content) or symbiotic N-fixation (rhizobia inoculated) conditions. We assessed if PvbZIP TF participate in CC-25-9-N common bean response to salinity. Quantitative reverse-transcriptase-PCR (qRT-PCR) expression analysis showed that 26 out of 46 root/nodule-enhanced PvbZIP , that responded to salt stress in roots and/or nodules from fertilized and N 2 -fixing CC-25-9-N plants. From public common bean transcriptomic data, we identified 554 genes with an expression pattern similar to that of salt-responsive PvbZIP genes, and propose that the co-expressed genes are likely to be involved in the stress response. Our data provide a foundation for evaluating the individual roles of salt-responsive genes and to explore the PvbZIP-mediated improvement of salt tolerance in common bean.

Keywords: bZIP transcription factors; common bean; salinity stress; legume-rhizobia symbiosis (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2018
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