Evaluation of tolerance to phosphorus shortage in cowpea (Vigna unguiculata L. Walp) in Cuba.. I. nutritive solution culture.

 

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Autoři: Gómez, Luis A., Vadez, Vincent, Hernández, Germán, Sánchez, Támara, Toscano, Vidalina
Médium: artículo
Stav:Versión publicada
Datum vydání:2006
Popis:Phosphorus deficiency is a major limitingfactor for symbiotic nitrogen fixation and grain yield oflegume crops in the tropics. Eight cowpea genotypes of wideuse in Cuba, were grown in hydroponics solutions; supplyingfrom 50 to 500 µM of P/plant/week. Nitrogen nutrition wasdependent upon symbiotic N2-fixation on adding of 4mmoles NO3/plant/week. Shoot growth was severely limitedby P deficiency, while dry weight of roots increased in bothgroups of plants. Nodule formation was severely decreasedby P deficiency, while specific nodule activity was increasedin the atmospheric N2 fixing plants. Growth response of N2plants was higher than that of NO3- fed plants due to P useefficiency, and revealed a the great large N2-fixationpotential of the specie.
Země:Portal de Revistas UCR
Instituce:Universidad de Costa Rica
Repositorio:Portal de Revistas UCR
Jazyk:Español
OAI Identifier:oai:portal.ucr.ac.cr:article/13453
On-line přístup:https://revistas.ucr.ac.cr/index.php/agromeso/article/view/13453
Access Level:acceso abierto