Evaluation of genotypic variation in leaf photosynthetic rate and its associated factors by using rice diversity research set of germplasm

Tomomi Kanemura, Koki Homma, Akihiro Ohsumi, Tatsuhiko Shiraiwa, Takeshi Horie

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

In order to evaluate genotypic variation, we measured leaf photosynthetic rate (Pn) and its associated factors for the rice diversity research set of germplasm (RDRS) selected from the Genebank in National Institute of Agrobiological Sciences (NIAS). Pn showed large genotypic variation from 11.9 to 32.1 μmol m-2 s-1. The variation in stomatal conductance to CO2 (Gs) explained about 50% of that in Pn, while that in nitrogen concentration (N) in leaves explained about 35%. The genotype group which mainly consists of aus type indica tended to have higher Gs, and the genotype group which corresponds to japonica had a higher nitrogen concentration (N) in leaves. The relationships of Pn with G s and N were not significantly different among genotype groups, suggesting photosynthetic efficiencies are similar among genotype groups.

Original languageEnglish
Pages (from-to)23-30
Number of pages8
JournalPhotosynthesis Research
Volume94
Issue number1
DOIs
Publication statusPublished - 2007 Oct 1
Externally publishedYes

Keywords

  • C/C: gas conductance
  • Carbon isotope discrimination
  • Genotype groups
  • Indica
  • Japonica
  • Nitrogen concentration
  • Oryza sativa L.

ASJC Scopus subject areas

  • Biochemistry
  • Plant Science
  • Cell Biology

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