تلخیص
Under low phosphorus (P) availability, plants change their root physiology and release more protons and carboxylates to
acquire P from residual sources. This ability differs among genotypes. In this situation, P efficient genotypes may be a
conceivable way of decreasing the P demand and using applied P efficiently. This study was planned with the objective of
screening P efficient wheat and maize genotypes on the basis of carboxylate and proton release under P deficient condition.
Five genotypes each of wheat and maize were grown in solution culture with normal and deficient P treatments under CRD
(completely randomized design) factorial. At harvest carboxylates, proton and P were analyzed. Results revealed that wheat
genotype, SARC-1 and maize genotype, Pioneer-32F10 was better in carboxylate exudation and more release of carboxylates
and proton was recorded in these genotypes comparative to other genotypes. Both genotypes also showed better P and
phosphorus use efficiency in P deficient treatment compared to normal P treatment. In the case of species, maize roots released
more fraction of malate and wheat roots released more fraction of citrate. This genetic difference can be used for the selection
of P efficient genotypes for P deficient soils through the breeding process in the future.