NaCl-induced physiological and biochemical adaptative mechanismsin the ornamental Myrtus communis L. plants
Physiological and biochemical changes in Myrtus communis L. plants after being subjected to differentsolutions of NaCl (44, and 88mM) for up to 30 days (Phase I) and after recovery from the salinity period (Phase II) were studied. Myrtle plants showed salinity tolerance by displaying a series of ada...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2015 |
| País: | España |
| Institución: | Universidad Católica San Antonio de Murcia (UCAM) |
| Repositorio: | RIUCAM. Repositorio Institucional de la Universidad Católica San Antonio de Murcia |
| OAI Identifier: | oai:repositorio.ucam.edu:10952/7381 |
| Acceso en línea: | http://hdl.handle.net/10952/7381 |
| Access Level: | acceso abierto |
| Palabra clave: | ASC-GSH cycle Gas exchange Leaf anatomy Oxidative stress Recovery capacity Water relations |
| Sumario: | Physiological and biochemical changes in Myrtus communis L. plants after being subjected to differentsolutions of NaCl (44, and 88mM) for up to 30 days (Phase I) and after recovery from the salinity period (Phase II) were studied. Myrtle plants showed salinity tolerance by displaying a series of adaptativemechanisms to cope with salt-stress, including controlled ion homeostasis, the increase in root/shootratio, the reduction of water potentials and stomatal conductance to limit water loss. In addition, theydisplayed different strategies to protect the photosynthetic machinery, including limiting toxic ion accu-mulation in leaves, increase in chlorophyll content, and changes in chlorophyll fluorescence parameters,leaf anatomy and increases in catalase activity. Anatomical modifications in leaves, including a decreasein spongy parenchyma and increased intercellular spaces, allow CO2 diffusion in a situation of reducedstomatal aperture. In spite of all these changes, salinity produced oxidative stress in myrtle plants asmonitored by increases in oxidative stress parameter values. The post-recovery period is perceived as anew stress situation, as observed through effects on plant growth and alterations in non-photochemicalquenching parameters and lipid peroxidation values. |
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