論文

2022年7月5日

A Koshihikari x Oryza rufipogon Introgression Line with a High Capacity to Take Up Nitrogen to Maintain Growth and Panicle Development Under Low Nitrogen Conditions.

Plant & cell physiology
  • Bright G Adu
  • ,
  • Aizelle Y S Argete
  • ,
  • Sakiko Egawa
  • ,
  • Astushi J Nagano
  • ,
  • Akifumi Shimizu
  • ,
  • Yoshihiro Ohmori
  • ,
  • Toru Fujiwara

記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1093/pcp/pcac097

Nitrogen (N) is an important macronutrient for plant growth and development. Currently, N fertilizers are required for the efficient production of modern crops such as rice due to their limited capacity to take up N when present at low concentrations. Wild rice represents a useful genetic resource for improving crop responses to low nutrient stress. Here, we describe the isolation and characterization of an introgression line, KRIL37, that carries a small region of the Oryza rufipogon genome in the O. sativa L. cv Koshihikari (KH) background. This line was found to grow better under low N conditions and have similar or lower C/N ratios in aerial portions compared to those in the parental KH cultivar, suggesting that KRIL37 has a higher capacity to take up and assimilate N when present at low concentrations. KRIL37 performance in the field was also better than that of KH cultivated without N and fertilizer (-F). Transcriptome analyses of 3-week -old seedlings based on RNA-seq revealed that KH induced a wider suite of genes than the tolerant line KRIL37 in response to low N conditions. Some ammonium transporters and N assimilation genes were found to be induced under low N in KRIL37, but not in KH. Our findings suggest that the superior growth performance of KRIL37 under limited N conditions could be due to the expression of wild alleles influencing N uptake and assimilation. Our study demonstrates the potential to use wild rice genomes to improve modern crops for low nutrient tolerance.

リンク情報
DOI
https://doi.org/10.1093/pcp/pcac097
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/35791818
ID情報
  • DOI : 10.1093/pcp/pcac097
  • PubMed ID : 35791818

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