Os12g0465700

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The rice Os12g0465700 was reported as DEC in 2012 [1] by researchers from Japan.

Annotated Information

Figure 1. Phenotypes of the dec-1 mutant.[1].

Function

  • DEC regulates the phyllotactic pattern in rice.
  • DEC has opposite functions in the shoot apical meristem and root apical meristem.
  • DEC encodes a plant-specific protein containing a glutamine-rich region and a conserved motif.
  • DEC controls the phyllotactic pattern by affecting cytokinin signaling in rice.

Expression

  • Expression analysis showed that several type A response regulator genes that act in the cytokinin signaling pathway were down-regulated in the dec mutant.

Phenotypic analysis

  • Two allelic mutants, dec-1 and dec-2, were originally identified as embryonic mutants exhibiting abnormally shaped mature embryos.
  • In mature dec-1 embryos, although all embryonic organs and three leaf primordia were present, a malformed scutellum and an enlarged SAM were observed (Figure 1a,b).
  • After germination, the majority of dec-1 seedlings produced short and erect leaves with an abnormal phyllotaxy (Figure 1c).
  • Cross-sections of the shoot apex revealed that the wild-type displayed a distichous phyllotaxy with a divergence angle of 180°. In contrast, approximately half of dec-1 seedlings exhibited a decussate phyllotaxy, except for the first embryonic leaf (Figure 1d,e).
  • Thus, the dec mutation caused conversion of a distichous phyllotaxy to a decussate phyllotaxy during early vegetative development.

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Labs working on this gene

  • Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, 113-8657, Japan
  • RIKEN Plant Science Center, Tsurumi, Yokohama, 230-0045, Japan

References

  1. 1.0 1.1 Itoh J, Hibara K, Kojima M, Sakakibara H, Nagato Y. Rice DECUSSATE controls phyllotaxy by affecting the cytokinin signaling pathway. Plant J. 2012 Dec;72(6):869-81. PubMed PMID: 22889403.

Structured Information