Journal article
Screening for internal phosphorus utilisation efficiency: comparison of genotypes at equal shoot P content is critical
Plant and Soil, Vol.401(1), pp.79-91
2016
Metrics
71 Record Views
UN Sustainable Development Goals (SDGs)
This output has contributed to the advancement of the following goals:
Source: InCites
Abstract
<p><h3>Aims</h3> <p id="x-x-x-x-x-Par1">Progress in improving the internal phosphorus utilisation efficiency of crops has been limited, which may be due to poor screening methods that allow differences in P uptake among genotypes grown in soil to mask genotypic differences in shoot biomass produced per unit of shoot P (PUE). We investigated alternative soil and hydroponic screening methods for their capacity to produce a consensus ranking of genotypes with regard to PUE. <h3>Methods</h3> <p id="x-x-x-x-x-Par2">Six rice genotypes previously identified in hydroponic screening studies as being high, intermediate or low in PUE were screened using multi P rate hydroponic and soil-based experiments. <h3>Results</h3> <p id="x-x-x-x-x-Par3">Comparisons made at each rate of soil-P supply produced estimates of PUE strongly biased by P uptake differences among genotypes. Using multiple-rate data to derive response functions per genotype showed that similar P content was achieved at different rates of P supply but that high-PUE genotypes clearly separated from intermediate- and low-PUE genotypes if equal P content was used. Ranking analysis suggested that results obtained from soil agreed well with those from the hydroponic study. <h3>Conclusions</h3> <p id="x-x-x-x-x-Par4">PUE was significantly influenced by genotype and P supply, but there was no significant genotype x P supply interaction. Hence, we conclude that screening genotypes using hydroponics at one or two P supply levels is the most cost- and time effective means to screen large numbers of rice genotypes for PUE.</p>
Details
- Title
- Screening for internal phosphorus utilisation efficiency: comparison of genotypes at equal shoot P content is critical
- Creators
- Terry J Rose - Southern Cross UniversityAsako Mori - Japan International Research Centre for Agricultural ScienceCecile C Julia - Southern Cross UniversityMatthias Wissuwa - Japan International Research Centre for Agricultural Science
- Publication Details
- Plant and Soil, Vol.401(1), pp.79-91
- Identifiers
- 1790; 991012820914502368
- Academic Unit
- Southern Cross GeoScience; Southern Cross Plant Science; Science; Faculty of Science and Engineering
- Resource Type
- Journal article