Lessons from engineering a single-cell C 4 photosynthetic pathway into rice

Mitsue Miyao, Chisato Masumoto, Shin Ichi Miyazawa, Hiroshi Fukayama

Research output: Contribution to journalReview articlepeer-review

67 Citations (Scopus)


The transfer of C 4 plant traits into C 3 plants has long been a strategy for improving the photosynthetic performance of C 3 plants. The introduction of a pathway mimicking the C 4 photosynthetic pathway into the mesophyll cells of C 3 plants was only a realistic approach when transgenic technology was sufficiently well developed and widely adopted. Here an attempt to introduce a single-cell C 4-like pathway in which CO 2 capture and release occur in the mesophyll cell, such as the one found in the aquatic plant Hydrilla verticillata (L.f.) Royle, into rice (Oryza sativa L.) is described. Four enzymes involved in this pathway were successfully overproduced in the transgenic rice leaves, and 12 different sets of transgenic rice that overproduce these enzymes independently or in combination were produced and analysed. Although none of these transformants has yet shown dramatic improvements in photosynthesis, these studies nonetheless have important implications for the evolution of C 4 photosynthetic genes and their metabolic regulation, and have shed light on the unique aspects of rice physiology and metabolism. This article summarizes the lessons learned during these attempts to engineer single-cell C 4 rice.

Original languageEnglish
Pages (from-to)3021-3029
Number of pages9
JournalJournal of experimental botany
Issue number9
Publication statusPublished - 2011 May
Externally publishedYes


  • C photosynthesis
  • NADP-malate dehydrogenase
  • NADP-malic enzyme
  • metabolic engineering
  • phosphoenolpyruvate carboxylase
  • pyruvate, orthophosphate dikinase
  • transgenic rice

ASJC Scopus subject areas

  • Physiology
  • Plant Science


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