Os02g0833000

The rice Os02g0833000 was reported as GnTI in 2013 by researchers from Korea.

Annotated Information

Gene Symbol

• Os02g0833000 <=> OsGnTI,GnTI

Figure 2. Developmental analysis of gnt1..

Function

• Oryza sativa GnTI encodes enzymatically and functionally active protein
• Loss of GnTI function resulted in decreased cell wall synthesis activity, which might be responsible for the brittle phenotype and reduced tensile strength in gnt1.
• GnTI plays an important role in cellulose biosynthesis in the plant.

Phenotypic analysis

• Phenotypic analyses revealed that gnt1 shows defective post-seedling development and incomplete cell wall bio-synthesis, leading to symptoms such as failure in tiller formation, brittle leaves, reduced cell wall thickness, and decreased cellulose content.
• The developmental defects of gnt1 ultimately resulted in early lethality without transition to the reproductive stage.
• However, callus induced from gnt1 seeds could be maintained for periods, although it exhibited a low proliferation rate, small size, and hypersensitivity to salt stress.
• Shoot regeneration and dark-induced leaf senescence assays indicated that the loss of GnTI function results in reduced sensitivity to cytokinin in rice.
• Reduced expression of A-type O. sativa response regulators that are rapidly induced by cytokinins in gnt1 confirmed that cytokinin signaling is impaired in the mutant.

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Labs working on this gene

• Division of Applied Life Science (BK21 Program) and PMBBRC, Gyeongsang National University, 501 Jinju-daero, Jinju 660-701, Korea
• Division of Electron Microscopic Research, Korea Basic Science Institute, 113 Gwahangno, Yuseong-gu, Daejeon 305-333, Korea
• Integrative Omics Research Center, Korea Research Institute of Bioscience and Biotechnology, Yuseong-gu, Daejeon 305- 806, Korea