Physiological and biochemical mechanisms of the ornamental Eugenia myrtifolia L. plants for coping with NaCl stress and recovery

Different physiological and biochemical changes in Eugenia myrtifolia L. plants after being subjected to NaCl stress for up to 30 days (Phase I) and after recovery from salinity (Phase II) were studied. Eugenia plants proved to be tolerant to NaCl concentrations between 44 and 88 mM, displaying a se...

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Autores: Acosta Motos, José Ramón, Diaz Vivancos, Pedro, Álvarez Martín, Sara, Fernández García, Nieves, Sánchez Blanco, María Jesús, Hernández, José Antonio
Tipo de documento: artigo
Data de publicação:2015
País:España
Recursos:Universidad Católica San Antonio de Murcia (UCAM)
Repositório:RIUCAM. Repositorio Institucional de la Universidad Católica San Antonio de Murcia
OAI Identifier:oai:repositorio.ucam.edu:10952/7382
Acesso em linha:http://hdl.handle.net/10952/7382
Access Level:Acceso aberto
Palavra-chave:ASC-GSH cycle
Gas exchange
Leaf anatomy
Oxidative stress
Recovery capacity
Water relations
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spelling Physiological and biochemical mechanisms of the ornamental Eugenia myrtifolia L. plants for coping with NaCl stress and recoveryAcosta Motos, José RamónDiaz Vivancos, PedroÁlvarez Martín, SaraFernández García, NievesSánchez Blanco, María JesúsHernández, José AntonioASC-GSH cycleGas exchangeLeaf anatomyOxidative stressRecovery capacityWater relationsDifferent physiological and biochemical changes in Eugenia myrtifolia L. plants after being subjected to NaCl stress for up to 30 days (Phase I) and after recovery from salinity (Phase II) were studied. Eugenia plants proved to be tolerant to NaCl concentrations between 44 and 88 mM, displaying a series of adaptative mechanisms to cope with salt-stress, including the accumulation of toxic ions in roots. Plants increased their root/shoot ratio and decreased their leaf area, leaf water potential and stomatal conductance in order to limit water loss. In addition, they displayed different strategies to protect the photosynthetic machinery, including the limited accumulation of toxic ions in leaves, increase in chlorophyll content, changes in chlorophyll fluorescence parameters, leaf anatomy and antioxidant defence mechanisms. Anatomical modifications in leaves, including an increase in palisade parenchyma and intercellular spaces and decrease in spongy parenchyma, served to facilitate CO2 diffusion in a situation of reduced stomatal aperture. Salinity produced oxidative stress in Eugenia plants as evidenced by oxidative stress parameters values and a reduction in APX and ASC levels. Nevertheless, SOD and GSH contents increased. The post-recovery period is detected as a new stress situation, as observed through effects on plant growth and alterations in chlorophyll fluorescence and oxidative stress parameters.Se estudiaron diferentes cambios fisiológicos y bioquímicos en plantas de Eugenia myrtifolia L. tras ser sometidas a estrés por cloruro sódico (NaCl) durante un máximo de 30 días (Fase I) y tras recuperarse de la salinidad (Fase II). Las plantas de Eugenia demostraron ser tolerantes a concentraciones de NaCl entre 44 y 88 mM, mostrando una serie de mecanismos adaptativos para hacer frente al estrés salino, incluyendo la acumulación de iones tóxicos en las raíces. Las plantas aumentaron su ratio raíz/brote y disminuyeron su área foliar, su potencial hídrico foliar y su conductancia estomática para limitar la pérdida de agua. Además, mostraron diferentes estrategias para proteger la maquinaria fotosintética, incluyendo la acumulación limitada de iones tóxicos en las hojas, el aumento del contenido de clorofila, los cambios en los parámetros de fluorescencia de la clorofila, la anatomía de las hojas y los mecanismos de defensa antioxidante. Las modificaciones anatómicas en las hojas, incluyendo un aumento del parénquima en empalizada y de los espacios intercelulares y una disminución del parénquima esponjoso, sirvieron para facilitar la difusión de CO2 en una situación de apertura estomática reducida. La salinidad produjo estrés oxidativo en las plantas de Eugenia, como evidenciaron los valores de los parámetros de estrés oxidativo y una reducción de los niveles de ascorbato peroxidasa (APX) y ácido ascórbico (ASC). Sin embargo, los contenidos de superóxido dismutasa (SOD) y glutatión (GSH) aumentaron. El periodo post-recuperación se detecta como una nueva situación de estrés, como se observa a través de los efectos sobre el crecimiento de la planta y las alteraciones en la fluorescencia de la clorofila y los parámetros de estrés oxidativo.Agricultura y VeterinariaCiencias Ambientales2015info:eu-repo/semantics/articlehttp://hdl.handle.net/10952/7382reponame:RIUCAM. Repositorio Institucional de la Universidad Católica San Antonio de Murciainstname:Universidad Católica San Antonio de Murcia (UCAM)Inglésinfo:eu-repo/semantics/openAccessoai:repositorio.ucam.edu:10952/73822026-06-07T18:35:21Z
dc.title.none.fl_str_mv Physiological and biochemical mechanisms of the ornamental Eugenia myrtifolia L. plants for coping with NaCl stress and recovery
title Physiological and biochemical mechanisms of the ornamental Eugenia myrtifolia L. plants for coping with NaCl stress and recovery
spellingShingle Physiological and biochemical mechanisms of the ornamental Eugenia myrtifolia L. plants for coping with NaCl stress and recovery
Acosta Motos, José Ramón
ASC-GSH cycle
Gas exchange
Leaf anatomy
Oxidative stress
Recovery capacity
Water relations
title_short Physiological and biochemical mechanisms of the ornamental Eugenia myrtifolia L. plants for coping with NaCl stress and recovery
title_full Physiological and biochemical mechanisms of the ornamental Eugenia myrtifolia L. plants for coping with NaCl stress and recovery
title_fullStr Physiological and biochemical mechanisms of the ornamental Eugenia myrtifolia L. plants for coping with NaCl stress and recovery
title_full_unstemmed Physiological and biochemical mechanisms of the ornamental Eugenia myrtifolia L. plants for coping with NaCl stress and recovery
title_sort Physiological and biochemical mechanisms of the ornamental Eugenia myrtifolia L. plants for coping with NaCl stress and recovery
dc.creator.none.fl_str_mv Acosta Motos, José Ramón
Diaz Vivancos, Pedro
Álvarez Martín, Sara
Fernández García, Nieves
Sánchez Blanco, María Jesús
Hernández, José Antonio
author Acosta Motos, José Ramón
author_facet Acosta Motos, José Ramón
Diaz Vivancos, Pedro
Álvarez Martín, Sara
Fernández García, Nieves
Sánchez Blanco, María Jesús
Hernández, José Antonio
author_role author
author2 Diaz Vivancos, Pedro
Álvarez Martín, Sara
Fernández García, Nieves
Sánchez Blanco, María Jesús
Hernández, José Antonio
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv ASC-GSH cycle
Gas exchange
Leaf anatomy
Oxidative stress
Recovery capacity
Water relations
topic ASC-GSH cycle
Gas exchange
Leaf anatomy
Oxidative stress
Recovery capacity
Water relations
description Different physiological and biochemical changes in Eugenia myrtifolia L. plants after being subjected to NaCl stress for up to 30 days (Phase I) and after recovery from salinity (Phase II) were studied. Eugenia plants proved to be tolerant to NaCl concentrations between 44 and 88 mM, displaying a series of adaptative mechanisms to cope with salt-stress, including the accumulation of toxic ions in roots. Plants increased their root/shoot ratio and decreased their leaf area, leaf water potential and stomatal conductance in order to limit water loss. In addition, they displayed different strategies to protect the photosynthetic machinery, including the limited accumulation of toxic ions in leaves, increase in chlorophyll content, changes in chlorophyll fluorescence parameters, leaf anatomy and antioxidant defence mechanisms. Anatomical modifications in leaves, including an increase in palisade parenchyma and intercellular spaces and decrease in spongy parenchyma, served to facilitate CO2 diffusion in a situation of reduced stomatal aperture. Salinity produced oxidative stress in Eugenia plants as evidenced by oxidative stress parameters values and a reduction in APX and ASC levels. Nevertheless, SOD and GSH contents increased. The post-recovery period is detected as a new stress situation, as observed through effects on plant growth and alterations in chlorophyll fluorescence and oxidative stress parameters.
publishDate 2015
dc.date.none.fl_str_mv 2015
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10952/7382
url http://hdl.handle.net/10952/7382
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:RIUCAM. Repositorio Institucional de la Universidad Católica San Antonio de Murcia
instname:Universidad Católica San Antonio de Murcia (UCAM)
instname_str Universidad Católica San Antonio de Murcia (UCAM)
reponame_str RIUCAM. Repositorio Institucional de la Universidad Católica San Antonio de Murcia
collection RIUCAM. Repositorio Institucional de la Universidad Católica San Antonio de Murcia
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869414866621562880
score 15,300719

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