Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/98221
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Type: Journal article
Title: The frustration with utilization: why have improvements in internal phosphorus utilization efficiency in crops remained so elusive?
Author: Rose, T.
Rose, M.
Pariasca-Tanaka, J.
Heuer, S.
Wissuwa, M.
Citation: Frontiers in Plant Science, 2011; 2(NOV):73-1-73-5
Publisher: Frontiers Media
Issue Date: 2011
ISSN: 1664-462X
Statement of
Responsibility: 
Terry J. Rose, Michael T. Rose, Juan Pariasca-Tanaka, Sigrid Heuer and Matthias Wissuwa
Abstract: Despite the attention internal phosphorus utilization efficiency (PUE) of crops has received in the literature, little progress in breeding crop cultivars with high PUE has been made. Surprisingly few studies have specifically investigated PUE; instead, genotypic variation for PUE has been investigated in studies that concurrently assess phosphorus acquisition efficiency (PAE). We hypothesized that genotypic differences in PAE confound PUE rankings because genotypes with higher PAE suffer a lower degree of P stress, resulting in lower PUE. The hypothesis was tested by comparing soil-based screening to a modified technique whereby rice genotypes were grown in individual containers with a single dose of solution P, to eliminate differences in P uptake among genotypes. Genotypic differences in PUE were apparent in root and shoot tissue using the modified nutrient solution technique, but PUE rankings showed no correlation with those from traditional soil-based screening. We conclude that PUE in soil-based screening systems is unavoidably linked with genotypic PAE, resulting in PUE rankings confounded by differences in P uptake. Only screening techniques assuring equal P uptake are suitable for the exploitation of genotypic variation for PUE.
Keywords: internal use efficiency; phosphorus acquisition efficiency; root growth; screening method; phosphorus concentration
Description: Published online: 01 November 2011.
Rights: © 2011 Rose, Rose, Pariasca-Tanaka, Heuer and Wissuwa. This is an open-access article subject to a non-exclusive license between the authors and Frontiers Media SA, which permits use, distribution and reproduction in other forums, provided the original authors and source are credited and other Frontiers conditions are complied with.
RMID: 0030042296
DOI: 10.3389/fpls.2011.00073
Appears in Collections:Agriculture, Food and Wine publications

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