%0 Journal Article
%T Efectos de la nutrici¨®n fosforada en el metabolismo de nitr¨®geno de la soja no nodulada
%A Brevedan1
%A RE
%A Avelda£¿o
%A MI
%A Fioretti
%A MN
%A Varillas
%A MA
%A Baioni
%A SS
%A Mirass¨®n
%A HR
%A Palomo
%A IR
%J Phyton (Buenos Aires)
%D 2009
%I Scientific Electronic Library Online
%X two experiments were conducted under greenhouse conditions to study the influence of p deficiency on nitrogen nutrition of non-nodulated soybean. there was a reduction of n and p content in p deficient (p-) plants of almost 50% after 50 days. during this period, dry matter of these plants was reduced by 33%. nitrate reductase activity and shoot nitrate content were lower in p than in p+ plants. seventy five percent of nitrates in p- plants were in the roots. nitrate accumulation in roots would be due to the lower nitrate reductase activity in this organ and a reduced water flux to shoots. root nitrate concentration increases would cause a negative feedback which would reduce plant nitrate uptake.
%K phosphorus deficiency
%K nitrate reductase
%K nitrate uptake
%K nitrate translocation
%K phosphorus-nitrogen interactions.
%U http://www.scielo.org.ar/scielo.php?script=sci_abstract&pid=S1851-56572009000100009&lng=en&nrm=iso&tlng=en