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Science 6 June 1997:
Vol. 276. no. 5318, pp. 1566 - 1568
DOI: 10.1126/science.276.5318.1566
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Reports

Aluminum Tolerance in Transgenic Plants by Alteration of Citrate Synthesis

Juan Manuel de la Fuente, * Verenice Ramírez-Rodríguez, * José Luis Cabrera-Ponce, Luis Herrera-Estrella dagger

Aluminum when in soluble form, as found in acidic soils that comprise about 40 percent of the world's arable land, is toxic to many crops. Organic acid excretion has been correlated with aluminum tolerance in higher plants. Overproduction of citrate was shown to result in aluminum tolerance in transgenic tobacco (Nicotiana tabacum) and papaya (Carica papaya) plants.

Departamento de Ingeniería Genética, Centro de Investigacion y Estudios Avanzados, Unidad Irapuato, Apdo, Postal 629 (36500) Irapuato, Guanajuato, México.
*   These authors contributed equally to this work.

dagger    To whom correspondence should be addressed at Departamento de Ingeniería Genética, Centro de Investigaciones y Estudios Avanzados (CINVESTAV), Unidad Irapuato, Apdo, Postal 629 (36500) Irapuato, Gto, México. E-mail: lherrera{at}irapuato.ira.cinvestav.mx

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