Importance of Physiological Traits Vulnerability in Determine Halophytes Tolerance to Salinity Excess: A Comparative Assessment in <i>Atriplex halimus</i>
Many halophytic physiological traits related to the tolerance of plants to salinity excess have been extensively studied, with a focus on biomass and/or gas exchange parameters. To gain a more complete understanding of whether salinity excess affects the physiological performance of halophytes, an e...
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| Format: | Article |
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MDPI AG
2020-05-01
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| Series: | Plants |
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| Online Access: | https://www.mdpi.com/2223-7747/9/6/690 |
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| author | Jesús Alberto Pérez-Romero Enrique Mateos-Naranjo Javier López-Jurado Susana Redondo-Gómez José M. Torres-Ruiz |
| author_facet | Jesús Alberto Pérez-Romero Enrique Mateos-Naranjo Javier López-Jurado Susana Redondo-Gómez José M. Torres-Ruiz |
| author_sort | Jesús Alberto Pérez-Romero |
| collection | DOAJ |
| description | Many halophytic physiological traits related to the tolerance of plants to salinity excess have been extensively studied, with a focus on biomass and/or gas exchange parameters. To gain a more complete understanding of whether salinity excess affects the physiological performance of halophytes, an experiment was performed using the halophyte <i>Atriplex halimus</i> L. as a model. <i>A. halimus</i> plants were subjected to two salinity treatments (171 and 513 mM NaCl) over 60 days in a controlled environment. After this period, dry biomass, specific stem conductivity, water potential at turgor loss point, osmotic potential, gas exchange parameters, and the fluorescence of chlorophyll <i>a</i> derived parameters were assessed in order to obtain knowledge about the differences in vulnerability that these parameters can show when subjected to salinity stress. Our results showed a decrease in belowground and aboveground biomass. The decrement in biomass seen at 513 mM NaCl was related to photosynthetic limitations and specific stem conductivity. Turgor loss point did not vary significantly with the increment of salinity. Therefore, the parameter that showed less vulnerability to saline stress was the turgor loss point, with only a 5% decrease, and the more vulnerable trait was the stem conductivity, with a reduction of nearly 50%. |
| first_indexed | 2024-03-10T19:31:56Z |
| format | Article |
| id | doaj.art-fab16ac2f64947c9b9bb8f0cfb8cb254 |
| institution | Directory Open Access Journal |
| issn | 2223-7747 |
| language | English |
| last_indexed | 2024-03-10T19:31:56Z |
| publishDate | 2020-05-01 |
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| record_format | Article |
| series | Plants |
| spelling | doaj.art-fab16ac2f64947c9b9bb8f0cfb8cb2542023-11-20T02:05:19ZengMDPI AGPlants2223-77472020-05-019669010.3390/plants9060690Importance of Physiological Traits Vulnerability in Determine Halophytes Tolerance to Salinity Excess: A Comparative Assessment in <i>Atriplex halimus</i>Jesús Alberto Pérez-Romero0Enrique Mateos-Naranjo1Javier López-Jurado2Susana Redondo-Gómez3José M. Torres-Ruiz4Dpto. de Biología Vegetal y Ecología, Facultad de Biología, Universidad de Sevilla, Av Reina Mercedes s/n, 41012 Sevilla, SpainDpto. de Biología Vegetal y Ecología, Facultad de Biología, Universidad de Sevilla, Av Reina Mercedes s/n, 41012 Sevilla, SpainDpto. de Biología Vegetal y Ecología, Facultad de Biología, Universidad de Sevilla, Av Reina Mercedes s/n, 41012 Sevilla, SpainDpto. de Biología Vegetal y Ecología, Facultad de Biología, Universidad de Sevilla, Av Reina Mercedes s/n, 41012 Sevilla, SpainINRA, PIAF, Université Clermont-Auvergne, 63000 Clermont-Ferrand, FranceMany halophytic physiological traits related to the tolerance of plants to salinity excess have been extensively studied, with a focus on biomass and/or gas exchange parameters. To gain a more complete understanding of whether salinity excess affects the physiological performance of halophytes, an experiment was performed using the halophyte <i>Atriplex halimus</i> L. as a model. <i>A. halimus</i> plants were subjected to two salinity treatments (171 and 513 mM NaCl) over 60 days in a controlled environment. After this period, dry biomass, specific stem conductivity, water potential at turgor loss point, osmotic potential, gas exchange parameters, and the fluorescence of chlorophyll <i>a</i> derived parameters were assessed in order to obtain knowledge about the differences in vulnerability that these parameters can show when subjected to salinity stress. Our results showed a decrease in belowground and aboveground biomass. The decrement in biomass seen at 513 mM NaCl was related to photosynthetic limitations and specific stem conductivity. Turgor loss point did not vary significantly with the increment of salinity. Therefore, the parameter that showed less vulnerability to saline stress was the turgor loss point, with only a 5% decrease, and the more vulnerable trait was the stem conductivity, with a reduction of nearly 50%.https://www.mdpi.com/2223-7747/9/6/690halophytespecific conductivityturgor loss pointphotosynthesischlorophyll fluorescence |
| spellingShingle | Jesús Alberto Pérez-Romero Enrique Mateos-Naranjo Javier López-Jurado Susana Redondo-Gómez José M. Torres-Ruiz Importance of Physiological Traits Vulnerability in Determine Halophytes Tolerance to Salinity Excess: A Comparative Assessment in <i>Atriplex halimus</i> Plants halophyte specific conductivity turgor loss point photosynthesis chlorophyll fluorescence |
| title | Importance of Physiological Traits Vulnerability in Determine Halophytes Tolerance to Salinity Excess: A Comparative Assessment in <i>Atriplex halimus</i> |
| title_full | Importance of Physiological Traits Vulnerability in Determine Halophytes Tolerance to Salinity Excess: A Comparative Assessment in <i>Atriplex halimus</i> |
| title_fullStr | Importance of Physiological Traits Vulnerability in Determine Halophytes Tolerance to Salinity Excess: A Comparative Assessment in <i>Atriplex halimus</i> |
| title_full_unstemmed | Importance of Physiological Traits Vulnerability in Determine Halophytes Tolerance to Salinity Excess: A Comparative Assessment in <i>Atriplex halimus</i> |
| title_short | Importance of Physiological Traits Vulnerability in Determine Halophytes Tolerance to Salinity Excess: A Comparative Assessment in <i>Atriplex halimus</i> |
| title_sort | importance of physiological traits vulnerability in determine halophytes tolerance to salinity excess a comparative assessment in i atriplex halimus i |
| topic | halophyte specific conductivity turgor loss point photosynthesis chlorophyll fluorescence |
| url | https://www.mdpi.com/2223-7747/9/6/690 |
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