21. ブラシノステロイド情報伝達突然変異体bil2の環境応答における機能解析(口頭発表,植物化学調節学会第46回大会)

概要

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Brassinosteroids are a group of plant steroidal hormones that regulate various aspects of plant growth and development. We had identified brassinosteroid biosynthesis inhibitor Brz insensitive mutant bill from EMS-mutation lines, and bil5 from fast neutron-mutation lines. To identify additional components of the brassinosteroid signaling, trial to screen new mutants as Brz-insensitive-long hypocotyls in the dark was applied to Arabidopsis activation-tag lines. We screened Arabidopsis activation-tag lines and isolated bil2 that showed long hypocotyls on the medium containing Brz in the dark. Light-grown bil2 mutants had long petiole phenotype similar to wild-type plants treated with BR or BRIT-OX mutants. These phenotypes suggested that bil2 mutants enhanced the BR signaling. Identification of over-expression the BIL2 candidate gene is progress.
2011-10-03