Elevation provenance affects photosynthesis and its acclimation to temperature in the high-Andes alpine herb Phacelia secunda
| Primer Autor |
Cavieres González, Lohengrin Alexis
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| Co-autores |
Hernandez-Fuentes, C.
Galmes, J.
Bravo, L. A.
Cavieres, L. A.
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| Título |
Elevation provenance affects photosynthesis and its acclimation to temperature in the high-Andes alpine herb Phacelia secunda
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| Editorial |
WILEY
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| Revista |
PLANT BIOLOGY
|
| Lenguaje |
en
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| Resumen |
We analysed whether Phacelia secunda populations from different elevations exhibit intrinsic traits associated with diffusive and biochemical components of photosynthesis, and if they differ in acclimation of photosynthesis to warmer temperatures. We hypothesized that P. secunda will have similar photosynthetic performance regardless of altitudinal provenance and that plants from high elevations will have a lower photosynthetic acclimation capacity to higher temperature than plants from low elevations. Plants from 1600, 2800 and 3600ma.s.l. in the central Chilean Andes were collected and grown under two temperature regimes (20/16 degrees C and 30/26 degrees C day/night). The following photosynthetic traits were measured in each plant for the two temperature regimes: A(N), g(s), g(m), J(max), V-cmax, Rubisco carboxylation k(cat)(c). Under a common growth environment, plants from the highest elevation had slightly lower CO2 assimilation rates compared to lower elevation plants. While diffusive components of photosynthesis increased with elevation provenance, the biochemical component decreased, suggesting compensation that explains the similar rates of photosynthesis among elevation provenances. Plants from high elevations had lower photosynthetic acclimation to warmer temperatures compared to plants from lower elevations, and these responses were related to elevational changes in diffusional and biochemical components of photosynthesis. Plants of P. secunda from different elevations maintain photosynthetic traits when grown in a common environment, suggesting low plasticity to respond to future climate changes. The fact that high elevation plants had lower photosynthetic acclimation to warmer temperature suggests higher susceptibility to increases in temperature associated with global warming.
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| Fecha Publicación |
2023
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| Tipo de Recurso |
artículo original
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| doi |
10.1111/plb.13539
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| Formato Recurso |
PDF
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| Palabras Claves |
Alpine plants
mesophyll conductance
photosynthetic limitations
Rubisco
temperature acclimation
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| Ubicación del archivo | |
| Categoría OCDE |
Ciencias de las plantas
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| Materias |
Plantas alpinas
conductancia del mesófilo
limitaciones fotosintéticas
Rubisco
aclimatación a la temperatura
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| Página de inicio (Recomendado-único) |
793.0
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| Página final (Recomendado-único) |
802
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| Identificador del recurso (Mandatado-único) |
artículo original
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| Versión del recurso (Recomendado-único) |
versión publicada
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| Derechos de acceso |
metadata
|
| Access Rights |
metadata
|
| Id de Web of Science |
WOS:001003821600001
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| ISSN |
1435-8603
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| Tipo de ruta |
hibrida
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| Categoría WOS |
Ciencias de las plantas
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