Changes in grain size and grain storage protein of rice (Oryza sativa L.) in response to elevated UV-B radiation under outdoor conditions

Jun Hidema, Wun Hui Zhang, Mitsuru Yamamoto, Tadashi Sato, Tadashi Kumagai

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)

Abstract

Variation in growth, grain size and grain storage protein content of rice (Oryza sativa L.) in response to elevated UV-B radiation under sunlight was examined in a cool rice-growing region of Miyagi Prefecture, Japan, in 1999, 2001 and 2002. Tiller number, dry mass, panicle number, grain yield and grain size significantly decreased under elevated UV-B radiation in 2001 and 2002. The effects of elevated UV-B radiation on the reduction of each growth parameter were greatly enhanced by daily lower temperature during the ripening stage in those two years. On the contrary, total grain nitrogen content and grain storage protein content significantly increased under elevated UV-B radiation in 2001 and 2002. Among grain storage proteins, glutelin content significantly increased but albumin-globulin and prolamin contents did not. It was thus evident that not only grain size but also grain storage protein of rice was markedly influenced due to elevated UV-B radiation.

Original languageEnglish
Pages (from-to)143-149
Number of pages7
JournalJournal of radiation research
Volume46
Issue number2
DOIs
Publication statusPublished - 2005 Jun

Keywords

  • Grain size
  • Grain storage protein
  • Growth
  • Rice (Oryza sativa)
  • Ultraviolet-B Radiation

ASJC Scopus subject areas

  • Radiation
  • Radiology Nuclear Medicine and imaging
  • Health, Toxicology and Mutagenesis

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