Enhanced high temperature tolerance in transgenic rice seedlings with elevated levels of alternative oxidase, OsAOX1a

Yuuki Murakami, Kinya Toriyama

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The cyanide-insensitive alternative oxidase (AOX) respiratory pathway can reduce the excessive production of reactive oxygen species. Here we showed that transgenic rice seedlings transformed with OsAOX1a for rice alternative oxidase under the control of ubiquitin promoter exhibited thermotolerance after acute exposure, 41-45°C for 10 min, or chronic exposure, 37°C for up to 8 days. In contrast, these high temperature stresses resulted in significant growth inhibition in wild-type and transgenic plants with antisense OsAOX1a. The enhanced tolerance was significant in shoot growth, suggesting that the increased levels of AOX protein would dissipate the excess reductants produced in the chloroplasts suffering from oxidative damage due to high temperature stress.

Original languageEnglish
Pages (from-to)361-364
Number of pages4
JournalPlant Biotechnology
Volume25
Issue number4
DOIs
Publication statusPublished - 2008 Jan 1

Keywords

  • Alternative oxidase
  • High temperature stress
  • Rice
  • Transgenic plant

ASJC Scopus subject areas

  • Biotechnology
  • Agronomy and Crop Science
  • Plant Science

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