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Recolector de Ciencia Abierta, RECOLECTA
Doctoral thesis . 2009
License: CC BY NC ND
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Recolector de Ciencia Abierta, RECOLECTA
Doctoral thesis . 2009
License: CC BY NC ND
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Mecanismos de resistencia a metales pesados en "Erica andevalensis"

Authors: Márquez García, María Belén;

Mecanismos de resistencia a metales pesados en "Erica andevalensis"

Abstract

Erica andevalensis Cabezudo & Rivera es un brezo endémico de la Faja Pirítica Ibérica (SO Península Ibérica), que vive en suelos ácidos y ricos en metales pesados. Esta tesis se ha dividido en tres grandes bloques. En primer lugar, se han realizado estudios de campo, analizando la distribución de la especie y el contenido de metales. En un segundo bloque, se han analizado distintos metabolitos y enzimas antioxidantes en planta silvestres, sin encontrar síntomas de estrés oxidativo, indicativo de que están adaptadas a ambientes extremos. En un tercer bloque se ha cultivado la especie en condiciones controladas de laboratorio, mediante micropropagación o a partir de semillas. La germinación está favorecida por la acidez y el alto contenido en Fe, factores que podrían explicar su distribución, así como por el ácido giberélico, fitohormona estudiada con fines de aumentar las tasas de germinación. En condiciones controladas de laboratorio es capaz de acumular cadmio en sus tejidos aéreos, defendiéndose aumentando la capacidad antioxidante total. ---------------------------------------------------Erica andevalensis Cabezudo & Rivera is an endemic Heather from the Iberian Pyritic Belt (SW Iberian Peninsula), that survives in acid and metal enriched soils. This PhD has been divided in three main sections. The first section of the thesis was to analyse the distribution of the plant and metal content. Secondly, antioxidant metabolites and enzymes were assayed in wild plants that did not show any symptom of oxidative stress, indicating that it is well adapted to extreme environments. Thirdly the species was cultivated under laboratory controlled conditions, using micropropagation techniques or from seeds. The germination is favoured by acidity and high levels of iron, factors that could explain its distribution. Germination was also favoured by gibberellic acid, phytohormone studied with the aim to increase the germination rate. Under laboratory controlled conditions the species is able to accumulate cadmium in the aerial tissues, increasing the total antioxidant capacity.

Country
Spain
Related Organizations
Keywords

Plantas, Efectos de los metales pesados sobre las, Oxidative stress, Ascorbic acid, Seed germination, Phenolic compounds, Cadmium

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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