@Article{phyton.2009.78.011,
AUTHOR = {Sánchez E, G Ávila-Quezada, AA Gardea, E Muñoz, JM Ruiz, L Romero},
TITLE = {Nitrogen metabolism in roots and leaves of green bean plants exposed to different phosphorus doses},
JOURNAL = {Phyton-International Journal of Experimental Botany},
VOLUME = {78},
YEAR = {2009},
NUMBER = {all},
PAGES = {11--16},
URL = {http://www.techscience.com/phyton/v78nall/36914},
ISSN = {1851-5657},
ABSTRACT = {The objective of this work was to determine the effect of different P doses on nitrogen assimilation in roots and leaves of green beans plants (<i>Phaseolus vulgaris</i> L. cv. Strike). Phosphorus was applied in the nutrient solution as H<sub>3</sub>PO<sub>4</sub>, at the nutrient doses of: P1 = 0.40 mM; P2 = 0.80 mM; P3 = 1.60 mM; P4 = 3.20 mM; P5 = 4.80 mM, and P6 = 6.40 mM P. Our results indicate that both P toxicity and deficiency gave similar responses to N assimilation. Phosphorus and NO3 - interacted on the absorption and translocation processes affecting N assimilation. The deficiency (P1), and toxicity (P6) treatments, diminished root absorption of NO<sub>3</sub><sup style="margin-left:-5px">-</sup>  in 15% and 36%, respectively, respect to the optimum dose (P3), thus reducing nutrient availability for assimilation. This result may explain the minimum enzymatic activities observed in NO<sub>3</sub><sup style="margin-left:-5px">-</sup>  assimilation in P1 and P6. The minimum N assimilation observed in these treatments will eventually translate into a minimum synthesis of major N organic compound involved in plant growth and development. This will lead to a reduced plant biomass production and productivity of green beans plants.},
DOI = {10.32604/phyton.2009.78.011}
}