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Research Article
YASUHIRO TSUJIMOTO
Japan International Research Center for Agricultural Sciences
Corresponding Author
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Improved phosphorus (P) use efficiency for crop production is needed given the depleting phosphorus ore deposits and increasing ecological concerns about its excessive use. Root system architecture (RSA) is important in efficiently capturing immobile P in soils, while agronomically, localized P application near the roots is a potential approach to address this issue. However, the interaction between genetic traits of RSA and localized P application has been little understood. Near-isogenic lines (NILs) and their parent of rice (qsor1-NIL, Dro1-NIL, and IR64, with shallow, deep, and intermediate root growth angles (RGA), respectively) were grown in flooded pots after placing P near the roots at transplanting (P-dipping). The experiment identified that the P-dipping created an available P hotspot at the soil surface; the qsor1-NIL had the greatest root biomass and root surface area in the 0–3 cm soil layer despite no genotype differences in total values; the qsor1-NIL had significantly greater biomass and P uptake than the other genotypes in the P-dipping. The superior surface root development of qsor1-NIL could have facilitated P uptakes from the P hotspot, implying that P-use efficiency in crop production can be further increased by combining genetic traits of RSA and localized P application.
Keywords
Improved phosphorus (P), Root system architecture (RSA), Near-isogenic lines (NILs)
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CURRENT STATUS: Under Review
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Posted 05 Jan, 2021
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Editorial decision: Major revision
On 05 Mar, 2021
Reviews received
Received 17 Feb, 2021
Reviewers agreed
On 08 Feb, 2021
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On 02 Feb, 2021
Editor invited
On 31 Dec, 2020
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On 30 Dec, 2020
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Subject Areas
Agricultural Engineering
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This preprint is under consideration at Scientific Reports. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research Article
YASUHIRO TSUJIMOTO
Japan International Research Center for Agricultural Sciences
Corresponding Author
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Under Review
Version 1
Posted 05 Jan, 2021
No community comments so far
Editorial decision: Major revision
On 05 Mar, 2021
Reviews received
Received 17 Feb, 2021
Reviewers agreed
On 08 Feb, 2021
Reviewers invited
Invitations sent on 08 Feb, 2021
Editor assigned
On 02 Feb, 2021
Editor invited
On 31 Dec, 2020
Submission checks complete
On 30 Dec, 2020
First submitted
On 30 Dec, 2020
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Agricultural Engineering
License:
This work is licensed under a CC BY 4.0 License. Read Full License
Improved phosphorus (P) use efficiency for crop production is needed given the depleting phosphorus ore deposits and increasing ecological concerns about its excessive use. Root system architecture (RSA) is important in efficiently capturing immobile P in soils, while agronomically, localized P application near the roots is a potential approach to address this issue. However, the interaction between genetic traits of RSA and localized P application has been little understood. Near-isogenic lines (NILs) and their parent of rice (qsor1-NIL, Dro1-NIL, and IR64, with shallow, deep, and intermediate root growth angles (RGA), respectively) were grown in flooded pots after placing P near the roots at transplanting (P-dipping). The experiment identified that the P-dipping created an available P hotspot at the soil surface; the qsor1-NIL had the greatest root biomass and root surface area in the 0–3 cm soil layer despite no genotype differences in total values; the qsor1-NIL had significantly greater biomass and P uptake than the other genotypes in the P-dipping. The superior surface root development of qsor1-NIL could have facilitated P uptakes from the P hotspot, implying that P-use efficiency in crop production can be further increased by combining genetic traits of RSA and localized P application.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
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