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Nutrient accumulation and transcriptome patterns during grain development in rice.

Zi-Wen Ren1,2, Peter M Kopittke3, Fang-Jie Zhao1

  • 1State Key Laboratory of Crop Genetics and Germplasm Enhancement and Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.

Journal of Experimental Botany
|October 22, 2022
PubMed
Summary
This summary is machine-generated.

Rice grain accumulates minerals in distinct patterns: early (K, Mn, B, Ca), mid (dry matter, N, P, S, Mg, Cu, Zn, Mo, As, Cd), and gradual (Fe). Understanding these dynamics is key for rice nutritional quality and safety.

Keywords:
Growth curvemineral elementsredistributionrice grain filling

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Area of Science:

  • Agricultural Science
  • Plant Physiology
  • Biogeochemistry

Background:

  • Rice is a vital global food source, providing essential calories and nutrients.
  • Mineral element accumulation in rice grain impacts nutritional value and safety.
  • Elemental accumulation dynamics during rice grain filling are not fully understood.

Purpose of the Study:

  • To investigate temporal changes in dry matter and elemental concentrations during rice grain filling.
  • To explore the influence of seed setting rate and grain position on element accumulation.
  • To analyze transcriptomic changes related to elemental accumulation.

Main Methods:

  • Field-grown rice cultivation.
  • Analysis of temporal changes in dry matter and elemental concentrations in grain.
  • Transcriptome sequencing of rice grain.
  • Investigation of seed setting rate and grain position effects.

Main Results:

  • Identified three distinct elemental accumulation patterns: early (K, Mn, B, Ca), mid (dry matter, N, P, S, Mg, Cu, Zn, Mo, As, Cd), and gradual (Fe).
  • Observed variations in accumulation based on seed setting rate and grain position within the panicle.
  • Linked accumulation patterns to element biogeochemistry, plant nutrient redistribution, gene expression, and sink-source dynamics.

Conclusions:

  • Elemental accumulation in rice grain follows specific temporal patterns influenced by multiple factors.
  • Findings enhance understanding of elemental dynamics in rice grain.
  • Results provide a basis for identifying genes involved in element translocation to rice grain.