@article{PAR00020536,
  title = {{A}ccumulation of phytate and starch lysophospholipids in rice grains and responses to alterations in {P} supply or source-sink relations},
  author = {{R}ose, {T}. {J}. and {W}elling, {M}. {T}. and {J}ulia, {C}. {C}. and {J}eong, {K}wanho and {T}ong, {C}. and {W}aters, {D}. {L}. {E}. and {L}iu, {L}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he removal of phosphorus ({P}) from fields in the harvested seeds of staple crops is a major driver of the global {P} cycle, and consequently, there is interest in breeding grain crops with lower seed {P} concentrations. {W}hile it is expected that a reduction in seed total {P} would result in lower concentrations of the {P}-rich anti-nutrient phytate, the potential consequences for starch lysophospholipids ({LPL}s), which affect rice grain quality and health outcomes in humans, are unknown. {W}e examined the accumulation of phytate and starch {LPL}s in developing indica (cv. {IR}64) and japonica (cv. {N}ipponbare) rice grains as well as the stability of starch {LPL}s and phytate under varying {P} supply treatments in hydroponics. {S}ource-sink relationships during grain filling (drought and floret abortion) were also investigated in a pot study. {A}ccumulation of phytate and starch {LPL}s in seeds continued until 18 days after anthesis ({DAA}) in cv. {N}ipponbare and 21 {DAA} in cv. {IR}64, which mirrored the accumulation of biomass in seeds. {I}n the hydroponic study, permanent withdrawal of {P} from the nutrient solution at anthesis (until maturity) led to significant reductions in both phytate and starch {LPL}s with a similar trend observed when {P} was withdrawn at 8 {DAA}. {I}n the pot study using soil, alteration of source-sink systems through drought stress during grain filling or floret abortion (manual removal of the top half of each panicle) also led to significant reductions in grain phytate and starch {LPL}s compared to control plants. {T}hese results indicate that in addition to affecting phytate concentrations, reduced {P} supply to rice plants during grain filling and alteration of source-sink relationships also impacts starch {LPL} concentrations. {G}iven these complexities, breeding and selection for reduced seed {P} concentration in rice and other cereals should be undertaken with caution.},
  keywords = {{G}rain quality ; {P}hosphorus ; {P}hytic acid ; {S}eed phosphorus},
  booktitle = {},
  journal = {{J}ournal of {C}ereal {S}cience},
  volume = {91},
  numero = {},
  pages = {art. 102896 [7 p.]},
  ISSN = {0733-5210},
  year = {2020},
  DOI = {10.1016/j.jcs.2019.102896},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00020536},
}