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Artículo

Characterization of quaternary ammonium compounds in Flourensia xerophytic communities and response to UV-B radiation

Piazza, Leonardo A.; López, D.; Silva, Mariana PaolaIcon ; Lopez Rivilli, Marisa JuanaIcon ; Cantero, Juan Jose; Tourn, G. M.; Scopel, Ana LeonorIcon
Fecha de publicación: 05/2014
Editorial: Elsevier Science
Revista: South African Journal Of Botany
ISSN: 0254-6299
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otros Tópicos Biológicos

Resumen

As part of ongoing studies aimed at characterizing molecular components involved in the ecophysiological adaptations of native xerophytic plants from central Argentina, we demonstrated the presence of compatible solutes in Flourensia campestris (FC) and Flourensia oolepis (FO), specifically glycine betaine (GB) through TLC, LC, 1H NMR and 13C-NMR. GB content (leaves: 38±7μmolg-1 DW; adult plants>seedlings), and distribution (capitula>vegetative leaves>reproductive leaves>shoots>roots) were similar to other quaternary ammonium compound (QAC) accumulators. Flourensia seedlings from both species protected from UV-B exposure - a major abiotic stress in these natural environments - showed a significant increase of GB in the leaves (p<0.01) and a significant decrease in the roots (p<0.05). In FC and FO xerophytic shrub-dominated communities QACs were detected for the first time in 41% of co-occurring species (N=39), 14 of 28 natives (50%) and 2 of 11 exotics (18%), being GB in natives only (57% of QAC accumulators). GB may be considered as a chemotaxonomical character for the genus Flourensia, since it was also detected in Flourensia hirta, Flourensia niederleinii, Flourensia riparia, Flourensia fiebrigii, Flourensia macroligulata and Flourensia heterolepis. Our controlled UV-B experiments, set up in the same natural environment where these species grow, clearly show that solar UV-B - and therefore oxidative stress - is involved in regulating GB contents and within-plant distribution in FC and FO seedlings. The findings in Flourensia co-occurring native species suggest that QACs accumulation may be considered as a community-specific ecophysiological trait in these xerophytic environments. .
Palabras clave: ABIOTIC STRESSES , ECOPHYSIOLOGY , GLYCINE BETAINE , NATIVE SPECIES , UV-B
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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/11336/99170
URL: https://www.sciencedirect.com/science/article/pii/S025462991400091X?via%3Dihub
DOI: http://dx.doi.org/10.1016/j.sajb.2014.05.001
Colecciones
Articulos(IMBIV)
Articulos de INST.MULTIDISCIPL.DE BIOLOGIA VEGETAL (P)
Articulos(INBA)
Articulos de INST.DE INVEST. EN BIOCIENCIAS AGRICOLAS Y AMBIENTALES
Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Citación
Piazza, Leonardo A.; López, D.; Silva, Mariana Paola; Lopez Rivilli, Marisa Juana; Cantero, Juan Jose; et al.; Characterization of quaternary ammonium compounds in Flourensia xerophytic communities and response to UV-B radiation; Elsevier Science; South African Journal Of Botany; 94; 5-2014; 14-23
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