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Author Yi J., Lee Y.S., Lee D.Y., Cho M.H., Jeon J.S., An G.
Title OsMPK6 plays a critical role in cell differentiation during early embryogenesis in Oryza sativa.
The formation of body axes is the basis of morphogenesis during plant embryogenesis. We identified embryo-lethal mutants of rice (Oryza sativa) in which T-DNAs were inserted inOsMPK6 Embryonic organs were absent because their development was arrested at the globular stage. Similar to observations made withgle4,shootless, andorganless, theosmpk6mutations affected the initial step of cell differentiation. Expression of an apical-basal axis marker gene,OSH1, was reduced in the mutant embryos while that of the radial axes marker genesOsSCRandOsPNH1was not detected. The signal forROC1, a protodermal cell marker, was weak at the globular stage and gradually disappeared. Transcript levels of auxin and gibberellin biosynthesis genes were diminished inosmpk6embryos. In addition, phytoalexin biosynthesis genes were down-regulated inosmpk6and a major diterpene phytoalexin, momilactone A, did not accumulate in the mutant embryos. These results indicate thatOsMPK6begins to play a critical role during early embryogenesis, especially when the L1 radial axis is being formed.
Journal J. Exp. Bot.
Country South Korea
Volume 67(8)
Pages 2425-37
Year 2016
PubMed ID 26912801
PubMed Central ID 4809295
DOI 10.1093/jxb/erw052
Strain Wild Core Collection -
Induced Mutation Lines(NIG Collection) -
Sterile Seed Strain -
Lethal Embryo
Mutantion Strain
Stages in Each Organ
- Muant Lines (Gene)
Cultivated Varieties(NIG Collection) -
Stages in Each Organ -