Sucrose affects the developmental transition of rhizomes in Oryza longistaminata

Kanako Bessho-Uehara, Jovano Erris Nugroho, Hirono Kondo, Rosalyn B. Angeles-Shim, Motoyuki Ashikari

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Oryza longistaminata, the African wild rice, can propagate vegetatively through rhizomes. Rhizomes elongate horizontally underground as sink organs, however, they undergo a developmental transition that shifts their growth to the surface of the ground to become aerial stems. This particular stage is essential for the establishment of new ramets. While several determinants such as abiotic stimuli and plant hormones have been reported as key factors effecting developmental transition in aerial stem, the cause of this phenomenon in rhizome remains elusive. This study shows that depletion of nutrients, particularly sucrose, is the key stimulus that induces the developmental transition in rhizomes, as indicated by the gradient of sugars from the base to the tip of the rhizome. Sugar treatments revealed that sucrose specifically represses the developmental transition from rhizome to aerial stem by inhibiting the expression of sugar metabolism and hormone synthesis genes at the bending point. Sucrose depletion affected several factors contributing to the developmental transition of rhizome including signal transduction, transcriptional regulation and plant hormone balance.

Original languageEnglish
Pages (from-to)693-707
Number of pages15
JournalJournal of Plant Research
Volume131
Issue number4
DOIs
Publication statusPublished - 2018 Jul 1
Externally publishedYes

Keywords

  • Developmental transition
  • Gravitropism
  • Oryza longistaminata
  • Rhizome
  • Sucrose

ASJC Scopus subject areas

  • Plant Science

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