Effects of salt stress on germination, seedling growth, osmotic adjustment, and chlorophyll fluorescence in Prosopis alba G.
Prosopis alba G. is a species of high forest importance in the phytogeographical region of Western Chaco. Although P. alba has been considered as salinity tolerant, its salinity thresholds for germination and seedling growth are unknown, as well as the physiological mechanisms involved in them. The...
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| Format: | Article |
| Language: | English |
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Facultad de Ciencias Agrarias. Universidad Nacional de Cuyo
2019-06-01
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| Series: | Revista de la Facultad de Ciencias Agrarias |
| Subjects: | |
| Online Access: | https://revistas.uncu.edu.ar/ojs/index.php/RFCA/article/view/2338 |
| _version_ | 1797756013607124992 |
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| author | Diego Ariel Meloni Marta Rosalía Gulotta Diolina Moura Silva María Paz Arraiza |
| author_facet | Diego Ariel Meloni Marta Rosalía Gulotta Diolina Moura Silva María Paz Arraiza |
| author_sort | Diego Ariel Meloni |
| collection | DOAJ |
| description |
Prosopis alba G. is a species of high forest importance in the phytogeographical region of Western Chaco. Although P. alba has been considered as salinity tolerant, its salinity thresholds for germination and seedling growth are unknown, as well as the physiological mechanisms involved in them. The aim of this study was to elucidate the mechanisms of tolerance of P. alba to salt stress. Seed germination, seedling growth, osmotic adjustment, and chlorophyll fluorescence were- analyzed. Germination was more tolerant to salinity than seedling growth, with thresholds of 600 mM and 500 mM, respectively. The species showed a high capability of osmotic adjustment, with values near to those observed in halophytes. The photochemical phase of photosynthesis was highly tolerant to saline stress, showing photoinhibition from 400 mM NaCl, as indicated by the fluorescence variables of chlorophyll. This behavior was associated to an increase in anthocyanin concentrations in the leaves.
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| first_indexed | 2024-03-12T17:54:27Z |
| format | Article |
| id | doaj.art-542c9324d3f144de8cbafc47a2cd0ed4 |
| institution | Directory Open Access Journal |
| issn | 0370-4661 1853-8665 |
| language | English |
| last_indexed | 2024-03-12T17:54:27Z |
| publishDate | 2019-06-01 |
| publisher | Facultad de Ciencias Agrarias. Universidad Nacional de Cuyo |
| record_format | Article |
| series | Revista de la Facultad de Ciencias Agrarias |
| spelling | doaj.art-542c9324d3f144de8cbafc47a2cd0ed42023-08-02T18:03:50ZengFacultad de Ciencias Agrarias. Universidad Nacional de CuyoRevista de la Facultad de Ciencias Agrarias0370-46611853-86652019-06-01511Effects of salt stress on germination, seedling growth, osmotic adjustment, and chlorophyll fluorescence in Prosopis alba G.Diego Ariel Meloni0Marta Rosalía Gulotta1Diolina Moura Silva2María Paz Arraiza3Universidad Nacional de Santiago del Estero. Av. Belgrano (S) 1912. 4200. Santiago del Estero. Argentina.Universidad Nacional de Santiago del Estero. Av. Belgrano (S) 1912. 4200. Santiago del Estero. Argentina.Universidade Federal do Espírito Santo. Departamento de Ciencias Biológicas. Núcleo de Pesquisa em Fotossíntese. Vitória. ES. Brasil.Universidad Politécnica de Madrid. Escuela Técnica Superior de Ingenieros de Montes, Forestal y Medio Natural. España. Prosopis alba G. is a species of high forest importance in the phytogeographical region of Western Chaco. Although P. alba has been considered as salinity tolerant, its salinity thresholds for germination and seedling growth are unknown, as well as the physiological mechanisms involved in them. The aim of this study was to elucidate the mechanisms of tolerance of P. alba to salt stress. Seed germination, seedling growth, osmotic adjustment, and chlorophyll fluorescence were- analyzed. Germination was more tolerant to salinity than seedling growth, with thresholds of 600 mM and 500 mM, respectively. The species showed a high capability of osmotic adjustment, with values near to those observed in halophytes. The photochemical phase of photosynthesis was highly tolerant to saline stress, showing photoinhibition from 400 mM NaCl, as indicated by the fluorescence variables of chlorophyll. This behavior was associated to an increase in anthocyanin concentrations in the leaves. https://revistas.uncu.edu.ar/ojs/index.php/RFCA/article/view/2338Germinationseedling growthosmotic adjustmentchlorophyll fluorescence |
| spellingShingle | Diego Ariel Meloni Marta Rosalía Gulotta Diolina Moura Silva María Paz Arraiza Effects of salt stress on germination, seedling growth, osmotic adjustment, and chlorophyll fluorescence in Prosopis alba G. Revista de la Facultad de Ciencias Agrarias Germination seedling growth osmotic adjustment chlorophyll fluorescence |
| title | Effects of salt stress on germination, seedling growth, osmotic adjustment, and chlorophyll fluorescence in Prosopis alba G. |
| title_full | Effects of salt stress on germination, seedling growth, osmotic adjustment, and chlorophyll fluorescence in Prosopis alba G. |
| title_fullStr | Effects of salt stress on germination, seedling growth, osmotic adjustment, and chlorophyll fluorescence in Prosopis alba G. |
| title_full_unstemmed | Effects of salt stress on germination, seedling growth, osmotic adjustment, and chlorophyll fluorescence in Prosopis alba G. |
| title_short | Effects of salt stress on germination, seedling growth, osmotic adjustment, and chlorophyll fluorescence in Prosopis alba G. |
| title_sort | effects of salt stress on germination seedling growth osmotic adjustment and chlorophyll fluorescence in prosopis alba g |
| topic | Germination seedling growth osmotic adjustment chlorophyll fluorescence |
| url | https://revistas.uncu.edu.ar/ojs/index.php/RFCA/article/view/2338 |
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