The expression of a peroxiredoxin antioxidant gene, AtPer1, in Arabidopsis thaliana is seed-specific and related to dormancy.
作者： Camilla Haslekås , Robin A. P. Stacy , Vigdis Nygaard , Francisco A. Culiáñez-Macià , Reidunn B. Aalen
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摘要: We have isolated a gene, AtPer1, from the dicotyledon Arabidopsis thaliana, which shows similarity to 1-cysteine (1-Cys) peroxiredoxin family of antioxidants. In higher plants, members this group antioxidants previously only been monocotyledons. It has suggested that seed peroxiredoxins protect tissues reactive oxygen species during desiccation and early imbibition and/or are involved in maintenance of/protection dormancy. AtPer1 expression is restricted seeds. Despite differences development between monocots dicots, an pattern germination similar dormancy-related transcript Per1 barley. situ hybridization identifies as first aleurone-expressed characterized developing The also expressed embryo. seeds unaltered ABA-deficient mutant (aba-1) development, while ABA-insensitive (abi3-1) reduced. not induced vegetative tissue response stress by ABA or drought. levels correlated frequencies wildtype seeds, but abundance sufficient for dormancy non-dormant mutants. Hypotheses on function discussed view results presented here.
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