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Artículo

Biomass allocation patterns are linked to genotypic differences in whole-plant transpiration efficiency in sunflower

Velazquez, LucianoIcon ; Alberdi, IgnacioIcon ; Paz, Cosme DanielIcon ; Aguirrezábal, Luis Adolfo NazarenoIcon ; Pereyra Irujo, Gustavo AdrianIcon
Fecha de publicación: 11/2017
Editorial: Frontiers in Bioscience
Revista: Frontiers in Plant Science
e-ISSN: 1664-462X
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Agricultura

Resumen

Increased transpiration efficiency (the ratio of biomass to water transpired, TE) could lead to increased drought tolerance under some water deficit scenarios. Intrinsic (i.e., leaf-level) TE is usually considered as the primary source of variation in whole-plant TE, but empirical data usually contradict this assumption. Sunflower has a significant variability in TE, but a better knowledge of the effect of leaf and plant-level traits could be helpful to obtain more efficient genotypes for water use. The objective of this study was, therefore, to assess if genotypic variation in whole-plant TE is better related to leaf- or plant-level traits. Three experiments were conducted, aimed at verifying the existence of variability in whole-plant TE and whole-plant and leaf-level traits, and to assess their correlation. Sunflower public inbred lines and a segregating population of recombinant inbred lines were grown under controlled conditions and subjected to well-watered and water-deficit treatments. Significant genotypic variation was found for TE and related traits. These differences in whole-plant transpiration efficiency, both between genotypes and between plants within each genotype, showed no association to leaf-level traits, but were significantly and negatively correlated to biomass allocation to leaves and to the ratio of leaf area to total biomass. These associations are likely of a physiological origin, and not only a consequence of genetic linkage in the studied population. These results suggest that genotypic variation for biomass allocation could be potentially exploited as a source for increased transpiration efficiency in sunflower breeding programmes. It is also suggested that phenotyping for TE in this species should not be restricted to leaf-level measurements, but also include measurements of plant-level traits, especially those related to biomass allocation between photosynthetic and non-photosynthetic organs.
Palabras clave: Biomass Allocation , Genotypic Variability , Helianthus Annuus , Sunflower , Transpiration Efficiency
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution 2.5 Unported (CC BY 2.5)
Identificadores
URI: http://hdl.handle.net/11336/70468
URL: http://journal.frontiersin.org/article/10.3389/fpls.2017.01976/full
DOI: https://doi.org/10.3389/fpls.2017.01976
Colecciones
Articulos(CCT - MAR DEL PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - MAR DEL PLATA
Citación
Velazquez, Luciano; Alberdi, Ignacio; Paz, Cosme Daniel; Aguirrezábal, Luis Adolfo Nazareno; Pereyra Irujo, Gustavo Adrian; Biomass allocation patterns are linked to genotypic differences in whole-plant transpiration efficiency in sunflower; Frontiers in Bioscience; Frontiers in Plant Science; 8; 11-2017; 1-12
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