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Nitrogen and photorespiration pathways, salt stress genotypic tolerance effects in tomato plants (Solanum lycopersicum L.)

  • Alejandro de la Torre-GonzálezEmail author
  • Eloy Navarro-León
  • Begoña Blasco
  • Juan M. Ruiz
Original Article
  • 64 Downloads

Abstract

Nitrogen is necessary to synthesize compounds such as chlorophyll, amino acids, nucleic acids, proteins, lipids, and other nitrogen (N) metabolites. In this sense, saline stress produces a decrement in the quality and quantity of crop production around the world due to an osmotic and ionic imbalance that alters the N metabolism. The objective of this work is to verify if the genotypic variability and a better nitrogen metabolism regulation improve tolerance to saline stress in tomato plants. This study was conducted with (Grand Brix and Marmande RAF) two tomato commercial genotypes (Solanum lycopersicum L). N forms, N metabolism, N use efficiency (NUE) parameters and amino acid profile were analyzed. A greater GS/GOGAT cycle enzyme activity could promote a better N integration in the plant, besides it promotes the generation of osmoprotective amino acids such as proline and improves the salt stress tolerance. A more effective N metabolism regulation indicates more salt tolerance. Our results showed a better effective N metabolism regulation by Grand Brix.

Keywords

Salt stress Solanum lycopersicum L. Nitrogen metabolism Amino acid NUE Photorespiration 

Notes

Acknowledgements

This study was financed by the PAI program (Plan Andaluz de Investigación, Grupo de investigación AGR282).

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Copyright information

© Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Kraków 2019

Authors and Affiliations

  1. 1.Department of Plant Physiology, Faculty of SciencesUniversity of GranadaGranadaSpain

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