Suppression of B function strongly supports the modified ABCE model in Tricyrtis sp. (Liliaceae)

Masahiro Otani, Ahmad Sharifi, Shosei Kubota, Kanako Oizumi, Fumi Uetake, Masayo Hirai, Yoichiro Hoshino, Akira Kanno, Masaru Nakano

    Research output: Contribution to journalArticlepeer-review

    19 Citations (Scopus)


    B class MADS-box genes play important roles in petal and stamen development. Some monocotyledonous species, including liliaceous ones, produce flowers with petaloid tepals in whorls 1 and 2. A modified ABCE model has been proposed to explain the molecular mechanism of development of two-layered petaloid tepals. However, direct evidence for this modified ABCE model has not been reported to date. To clarify the molecular mechanism determining the organ identity of two-layered petaloid tepals, we used chimeric repressor gene-silencing technology (CRES-T) to examine the suppression of B function in the liliaceous ornamental Tricyrtis sp. Transgenic plants with suppressed B class genes produced sepaloid tepals in whorls 1 and 2 instead of the petaloid tepals as expected. In addition, the stamens of transgenic plants converted into pistil-like organs with ovule-and stigma-like structures. This report is the first to describe the successful suppression of B function in monocotyledonous species with two-layered petaloid tepals, and the results strongly support the modified ABCE model.

    Original languageEnglish
    Article number24549
    JournalScientific reports
    Publication statusPublished - 2016 Apr 15

    ASJC Scopus subject areas

    • General


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