Plant Biotechnology
Online ISSN : 1347-6114
Print ISSN : 1342-4580
ISSN-L : 1342-4580
The Arabidopsis CAPRICE protein fused to the VP16 transcriptional activation domain alters root hair and trichome development
Rumi Tominaga-WadaTakuji Wada
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2016 Volume 33 Issue 2 Pages 129-132


CAPRICE (CPC) is a key regulator of epidermal cell fate determination, including root hair and trichome formation, in Arabidopsis thaliana. CPC encodes an R3 MYB transcription factor and is known to be involved in the transcriptional repression of the downstream gene GLABRA2 (GL2). We examined transgenic plants harboring CPC fused to a virus-derived transcriptional activator domain (CPC:VP16). Plants carrying 35S::CPC:VP16 showed increased root hair formation, similar to 35S::CPC plants, compared to the wild-type plants. However, transgenic plants harboring CPC:VP16 under the control of CPC promoter (CPC::CPC:VP16) showed similar root hair phenotype to that of the wild-type plants, suggesting an inherent cell-to-cell movement ability of CPC:VP16. In this study, all transgenic plants harboring CPC:VP16 possessed a reduced number of trichomes, nearly identical to that of 35S::CPC plants, compared to the wild type. Furthermore, we observed some unusual tissues with ectopic trichome clusters in all transgenic plants harboring CPC:VP16. These results indicate that VP16 generally does not confer the transcriptional activation ability to CPC.

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© 2016 by Japanese Society for Plant Biotechnology
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