Transport and use of bicarbonate in plants : current knowledge and challenges ahead
Poschenrieder, Charlotte (Universitat Autònoma de Barcelona. Laboratori de Fisiologia Vegetal)
Fernández, José A. (Universidad de Málaga. Departamento de Botánica y Fisiología Vegetal)
Rubio, Lourdes (Universidad de Málaga. Departamento de Botánica y Fisiología Vegetal)
Pérez-Martín, Laura (Universitat Autònoma de Barcelona. Laboratori de Fisiologia Vegetal)
Terés Gelabert, Joana (Universitat Autònoma de Barcelona. Laboratori de Fisiologia Vegetal)
Barceló Coll, Juan (Universitat Autònoma de Barcelona. Laboratori de Fisiologia Vegetal)

Fecha:	2018
Resumen:	Bicarbonate plays a fundamental role in the cell pH status in all organisms. In autotrophs, HCO₃⁻ may further contribute to carbon concentration mechanisms (CCM). This is especially relevant in the CO₂-poor habitats of cyanobacteria, aquatic microalgae, and macrophytes. Photosynthesis of terrestrial plants can also benefit from CCM as evidenced by the evolution of C₄ and Crassulacean Acid Metabolism (CAM). The presence of HCO₃⁻ in all organisms leads to more questions regarding the mechanisms of uptake and membrane transport in these different biological systems. This review aims to provide an overview of the transport and metabolic processes related to HCO₃⁻ in microalgae, macroalgae, seagrasses, and terrestrial plants. HCO₃⁻ transport in cyanobacteria and human cells is much better documented and is included for comparison. We further comment on the metabolic roles of HCO₃⁻ in plants by focusing on the diversity and functions of carbonic anhydrases and PEP carboxylases as well as on the signaling role of CO₂/HCO₃⁻ in stomatal guard cells. Plant responses to excess soil HCO₃⁻ is briefly addressed. In conclusion, there are still considerable gaps in our knowledge of HCO₃⁻ uptake and transport in plants that hamper the development of breeding strategies for both more efficient CCM and better HCO₃⁻ tolerance in crop plants.
Ayudas:	Ministerio de Ciencia e Innovación BFU2016-75176-R Ministerio de Ciencia e Innovación BFU2017-85117-R Ministerio de Ciencia e Innovación BIO2016-81957-REDT Ministerio de Ciencia e Innovación SAF2010-21224
Derechos:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió publicada
Materia:	Bicarbonate ; Transporter ; Metabolism ; Carbonic anhydrase ; Carboxylases ; Carbon concentration mechanisms ; Algae ; Seagrass ; Higher land plants ; Limestone soil
Publicado en:	International journal of molecular sciences, Vol. 19, Issue 5 (May 2018) , art. 1352, ISSN 1422-0067

DOI: 10.3390/ijms19051352
PMID: 29751549

25 p, 1.4 MB

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