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Doctoral thesis . 2013 . Peer-reviewed
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Tolerancia a la salinidad de plantas de mandioca (Manihot esculenta Cranz): influencia de la micorriza

Authors: Carretero Montero, Carlos Luis;

Tolerancia a la salinidad de plantas de mandioca (Manihot esculenta Cranz): influencia de la micorriza

Abstract

La necesidad de producir mayor cantidad de alimentos y de manera más constante, obliga a pensar en la utilización de tierras marginales que se caracterizan, a veces, por presentar suelos y aguas con alto grado de salinidad. La salinidad en el suelo o en el agua representa una de las situaciones de estrés para las plantas, cuya importancia en la agricultura va en aumento. Por ello, resulta muy interesante disponer de plantas cultivadas tolerantes a la salinidad y así mantener su potencial productivo. En general, un suelo salino se forma cuando la entrada de sales es mayor que su salida, lo que depende del clima, geomorfología, relieve e hidrología (Ponnamperuma, 1984). El exceso de sales en un suelo puede obedecer a la presencia de rocas salinas, como ocurre en las regiones semiáridas y áridas del mundo (Greenway y Munns, 1980; Tanji, 1990), o como se produce en áreas costeras tanto áridas como húmedas, por la intrusión en superficie o en el subsuelo del agua del mar. Otra fuente de salinización puede ser el propio riego. A este proceso se le denomina salinización secundaria y se produce al regar con agua salina en condiciones de drenaje deficiente. Un tercio de los regadíos en el mundo se ven afectados por sales. En general, las hectáreas afectadas por la salinidad en el mundo (fig. 1) se estiman en mil millones (Dudal y Purnell, 1986). El principal efecto de la salinidad sobre los cultivos es el descenso de su rendimiento y calidad, que se traduce en pérdidas económicas a la vez que convierte las tierras en improductivas, con su consiguiente abandono y posterior desertización (Royo y Aragües, 1989).

El presente estudio tiene su origen en el proyecto titulado “Amélioration des cultivars africains de manioc” financiado por la CEE con el número de contrato TS2A- 0239-M (CD). Este proyecto estuvo coordinado por Joseph Mabanza del Laboratoire d ́Amélioration des plantes et de Culture in vitro (LAP-CV)/DGRST de Congo Brazzaville. En el proyecto participaron las siguientes instituciones: Gabón : Projet-FAO-CIAM Francia: ORSTON Génétique Montpellier. Université Paris Sud (Laboratoire de Morphogénèse Végétale Expérimentale). Italia: Istituto sulla Propagazione delle Specie Legnose di Firense (CNR). España: - Instituto de Recursos Naturales y Agrobiología de Sevilla (CSIC). - Estación Experimental del Zaidín de Granada (CSIC).

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selected citations
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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).
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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.
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