Root exudation by P-starved maize genotypes and its relationship with P uptake
2002
Singh, B. (Indian Agricultural Research Institute, New Delhi (India). Nuclear Research Laboratory) | Pandey, R. (Indian Agricultural Research Institute, New Delhi (India). Div. of Plant Physiology)
Availability of phosphorus (P) in soil and its acquisition by plant is affected by the release ofhigh and low molecular weight root exudates. The relationship between root exudation and P-acquisition was, therefore, examined in two maize genotypes, Ganga-ll and Deccan-l03, raised under P deficient condition. The genotypes showed differences in magnitude ofroot exudation and its sugar and amino acid content. Genotypic differences were also observed for P-uptake using 32P. U ptake efficiency of the genotype was positively related to exudation levels of roots. Compared to Deccan-l03, Ganga-11 possessed traits that were better suited for P-deficient conditions.
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