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Metabolomic markers and physiological adaptations for high phosphate utilization efficiency in rice
Author(s) -
Watanabe Mutsumi,
Walther Dirk,
Ueda Yoshiaki,
Kondo Katsuhiko,
Ishikawa Satoru,
Tohge Takayuki,
Burgos Asdrubal,
Brotman Yariv,
Fernie Alisdair R,
Hoefgen Rainer,
Wissuwa Matthias
Publication year - 2020
Publication title -
plant, cell and environment
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.646
H-Index - 200
eISSN - 1365-3040
pISSN - 0140-7791
DOI - 10.1111/pce.13777
Subject(s) - metabolomics , cultivar , metabolite , biochemistry , oryza sativa , biology , phosphate , food science , assimilation (phonology) , sugar , metabolism , chemistry , botany , gene , bioinformatics , linguistics , philosophy
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 (PUE). P deficiency generally reduced leaf P concentrations and CO 2 assimilation rates but efficient cultivars were reducing leaf P concentrations further than inefficient ones while maintaining similar CO 2 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 defence 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.