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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Tryptophan-independent auxin biosynthesis contributes to early embryogenesis in Arabidopsis
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Tryptophan-independent auxin biosynthesis contributes to early embryogenesis in Arabidopsis

机译：Tryptophan-independent auxin biosynthesis contributes to early embryogenesis in Arabidopsis

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摘要

The phytohormone auxin regulates nearly all aspects of plant growth and development. Tremendous achievements have been made in elucidating the tryptophan (Trp)-dependent auxin biosynthetic pathway; however, the genetic evidence, key components, and functions of the Trp-independent pathway remain elusive. Here we report that the Arabidopsis indole synthase mutant is defective in the long-anticipated Trp-independent auxin biosynthetic pathway and that auxin synthesized through this spatially and temporally regulated pathway contributes significantly to the establishment of the apical-basal axis, which profoundly affects the early embryogenesis in Arabidopsis. These discoveries pave an avenue for elucidating the Trp-independent auxin biosynthetic pathway and its functions in regulating plant growth and development.

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