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Genotypic differences in phosphate utilization efficiency (PUE) and photosynthetic efficiency under P starvation and metabolic markers for high PUE
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  • Mutsumi Watanabe,
  • Yoshiaki Ueda,
  • Katsuhiko Kondo,
  • Satoru Ishikawa,
  • Takayuki Toghe,
  • Asdrubal Burgos,
  • Yariv Brotman,
  • Alisdair R. Fernie,
  • Dirk Walther,
  • Rainer Hoefgen,
  • Matthias Wissuwa
Mutsumi Watanabe
MPI of Molecular Plant Physiology
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Yoshiaki Ueda
Japan International Research Center for Agricultural Sciences (JIRCAS)
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Katsuhiko Kondo
Japan International Research Center for Agricultural Sciences (JIRCAS)
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Satoru Ishikawa
National Agriculture and Food Research Organization (NARO)
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Takayuki Toghe
MPI of Molecular Plant Physiology
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Asdrubal Burgos
MPI of Molecular Plant Physiology
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Yariv Brotman
MPI of Molecular Plant Physiology
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Alisdair R. Fernie
MPI of Molecular Plant Physiology
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Dirk Walther
MPI of Molecular Plant Physiology
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Rainer Hoefgen
MPI of Molecular Plant Physiology
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Matthias Wissuwa
Japan International Research Center for Agricultural Sciences (JIRCAS)
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Abstract

Utilizing phosphate more efficiently is crucial for sustainable crop production. Highly efficient rice (Oryza sativa) cultivars have been identified and this study aims to identify metabolic markers associated with P utilization efficiency. P deficiency generally reduced leaf P concentrations and CO2 assimilation rates but efficient cultivars were reducing leaf P concentrations further than inefficient ones while maintaining similar CO2 assimilation rates. Adaptive changes in carbon metabolism were detected but equally in efficient and inefficient cultivar groups. Groups furthermore did not differ with respect to partial substitutions of phospholipids by sulfo- and galactolipids. Metabolites significantly more abundant in the efficient group, such as sinapate, benzoate and glucoronate, were related to antioxidant defense and may help alleviating oxidative stress caused by P deficiency. Sugar alcohols ribitol and threitol were another marker metabolite for higher phosphate efficiency as were several amino acids, especially threonine. Since these metabolites are not known to be associated with P deficiency, they may provide novel clues for the selection of more P efficient genotypes. In conclusion, metabolite signatures detected here were not related to phosphate metabolism but rather helped P efficient lines to keep vital processes functional under the adverse conditions of P starvation.

Peer review status:ACCEPTED

19 Feb 2020Submitted to Plant, Cell & Environment
27 Feb 2020Submission Checks Completed
27 Feb 2020Assigned to Editor
02 Mar 2020Reviewer(s) Assigned
06 Apr 2020Review(s) Completed, Editorial Evaluation Pending
07 Apr 2020Editorial Decision: Revise Minor
15 Apr 20201st Revision Received
15 Apr 2020Submission Checks Completed
15 Apr 2020Assigned to Editor
17 Apr 2020Review(s) Completed, Editorial Evaluation Pending
17 Apr 2020Editorial Decision: Accept