Genetic and physiological traits for internal phosphorus utilization efficiency in rice
書誌事項
- 公開日
- 2020-11-05
- 資源種別
- journal article
- 権利情報
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- http://creativecommons.org/licenses/by/4.0/
- DOI
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- 10.1371/journal.pone.0241842
- 公開者
- Public Library of Science (PLoS)
説明
<jats:p>Phosphorus (P) is an essential macronutrient for plant growth and development. Phosphorus is usually applied as fertilizer obtained from rock phosphate which is a non-renewable resource. Therefore, developing rice varieties that can use P more efficiently is crucial. Here, we investigated genotypic differences in traits related to internal Phosphorus Utilization Efficiency (PUE) in five rice genotypes grown under P-deficient conditions. P-efficient rice genotypes showed higher total biomass. This was partly due to higher root biomass, which in turn relied on preferential allocation of P to roots in these genotypes. Changes in P content and tissue P concentrations were analyzed in individual leaves at different time points. Genotypes belonging to the high-PUE group responded more quickly to P starvation in terms of reducing leaf P concentrations and they were able to reduce these concentrations to a lower level compared to the low-PUE group. Changes in P concentrations were reflected in gene expression levels for genes involved in lipid remodeling. Sulfolipid (<jats:italic>OsSQD2</jats:italic>) and galactolipid (<jats:italic>OsMGD</jats:italic>and<jats:italic>OsDGD</jats:italic>) synthesis-related genes were generally induced due to P starvation with most pronounced up-regulation in<jats:italic>OsDGD1</jats:italic>and<jats:italic>OsMGD3</jats:italic>, but patterns differed between genotypes. A significantly higher expression of<jats:italic>OsDGD5</jats:italic>and<jats:italic>OsMGD1 & 2</jats:italic>was detected in the youngest fully expanded leaf of the high-PUE genotype group, whereas expression levels were reversed in older leaves. This pattern would confirm that P efficient genotypes react faster to P starvation in terms of freeing P for redistribution to growing tissues and replacing phospholipids with galactolipids in younger leaves may contribute to this aspect.</jats:p>
収録刊行物
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- PLOS ONE
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PLOS ONE 15 (11), e0241842-, 2020-11-05
Public Library of Science (PLoS)
