Molecular distinction in genetic regulation of nonphotochemical quenching in rice

Ichiro Kasajima, Kaworu Ebana, Toshio Yamamoto, Kentaro Takahara, Masahiro Yano, Maki Kawai-Yamada, Hirofumi Uchimiya

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63 Citations (Scopus)


Nonphotochemical quenching (NPQ) regulates energy conversion in photosystem II and protects plants from photoinhibition. Here we analyze NPQ capacity in a number of rice cultivars. NPQ was strongly induced under medium and high light intensities in rice leaves. Japonica cultivars generally showed higher NPQ capacities than Indica cultivars when we measured a rice core collection. We mapped NPQ regulator and identified a locus (qNPQ1-2) that seems to be responsible for the difference in NPQ capacity between Indica and Japonica. One of the two rice PsbS homologues (OsPsbS1) was found within the qNPQ1-2 region. PsbS protein was not accumulated in the leaf blade of the mutant harboring transferred DNA insertion in OsPsbS1. NPQ capacity increased as OsPsbS1 expression increased in a series of transgenic lines ectopically expressing OsPsbS1 in an Indica cultivar. Indica cultivars lack a 2.7-kb region at the point 0.4 kb upstream of the OsPsbS1 gene, suggesting evolutionary discrimination of this gene.

Original languageEnglish
Pages (from-to)13835-13840
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number33
Publication statusPublished - Aug 16 2011
Externally publishedYes


  • Chlorophyll fluorescence
  • Pulse amplitude modulation
  • Quantitative trait loci analysis
  • Rice subclass

ASJC Scopus subject areas

  • General


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