Monthly variability in the photosynthetic capacities, leaf mass per area and leaf nitrogen contents of rice (Oryza sativa L.) plants and their correlations

• TATSUMI Kenichi

  Division of Environmental and Agricultural Engineering, Institute of Agriculture, Tokyo University of Agriculture and Technology PRESTO Researcher, Japan Science and Technology Agency

• KUWABARA Yoshiki

  Field Science Center, Faculty of Agriculture, Yamagata University

• MOTOBAYASHI Takashi

  Division of Science of Biological Production, Institute of Agriculture, Tokyo University of Agriculture and Technology

書誌事項

タイトル別名

• Monthly variability in the photosynthetic capacities, leaf mass per area and leaf nitrogen contents of rice (<I>Oryza sativa</I> L.) plants and their correlations

抄録

The monthly variability in the photosynthetic capacities, leaf mass per area (LMA) and leaf nitrogen (N) contents of rice (Oryza sativa L.) plants is important for determining the growth conditions, estimating the biomass and yield, and developing a rice growth model. Moreover, the correlations among LMA, leaf N content, and photosynthetic capacity parameters, such as the maximum rate of carboxylation (V_cmax) and the maximum rate of electron transport (J_max), have not been fully investigated. The objectives of this study were (1) to analyze the monthly variability in V_cmax, J_max, LMA, and leaf N content; and (2) to investigate the correlations among V_cmax, J_max, LMA, leaf N content, and available N content in the soil. We measured the monthly changes in V_cmax and J_max in 120 leaves of two rice cultivars, Koshihikari and Akitakomachi, subjected to standard-N and non-N treatments using gas-exchange measurements under open-air field conditions. V_cmax and J_max values adjusted to a 25°C leaf temperature were significantly greater after the standard-N treatment compared with the non-N treatment in both cultivars, and the values of the photosynthetic capacities tended to decrease over time. In particular, these values significantly decreased at the ripening stage compared with the previous growth stages. The correlations among V_cmax and J_max at a 25°C leaf temperature, leaf N content based on mass and area, and SPAD readings were significant for both cultivars but were not correlated with LMA. As indicators of photosynthetic performance, the monthly variability in V_cmax and J_max for the fully expanded top or flag leaves were expressed easily as functions of the SPAD readings, rather than the leaf N contents based on mass and area, which are relatively expensive and labor intensive to measure. This research provides useful information for developing a universal rice growth model.

収録刊行物

• 農業気象

  農業気象 75 (2), 111-119, 2019

  日本農業気象学会

キーワード

• Maximum rate of carboxylation
• Maximum rate of electron transport
• Photosynthesis
• Rice leaves

詳細情報

• CRID: 1390001288130929792
• NII論文ID: 40021869076
• NII論文ID: 130007630085
• NII書誌ID: AN00200732
• DOI: 10.2480/agrmet.d-18-00043
• ISSN: 18810136
• ISSN: 00218588
• NDL書誌ID: 029637803
• Web Site: http://id.ndl.go.jp/bib/029637803
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I029637803
• Web Site: https://www.jstage.jst.go.jp/article/agrmet/75/2/75_D-18-00043/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可