Characterization of a Tos17 Insertion Mutant of Rice Auxin Signal Transcription Factor Gene, OsARF24 - American Journal of Plant Sciences

AJPS > Vol.4 No.1, January 2013

American Journal of Plant Sciences

Volume 4, Issue 1 (January 2013)

ISSN Print: 2158-2742 ISSN Online: 2158-2750

Google-based Impact Factor: 1.20 Citations h5-index & Ranking

Characterization of a Tos17 Insertion Mutant of Rice Auxin Signal Transcription Factor Gene, OsARF24 ()

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DOI: 10.4236/ajps.2013.41013 5,406 Downloads 8,071 Views Citations

Author(s)

Tomoaki Sakamoto, Yoshiaki Inukai

Affiliation(s)

Faculty of Bioresources and Environmental Sciences, Ishikawa Prefectural University, Nonoichi, Japan.
Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan.

ABSTRACT

Auxin signaling plays a key role in the regulation of various growth and developmental processes in higher plants. Auxin response factors (ARFs) are transcription factors that regulate the expression of auxin-response genes. The osarf24-1 mutant contains a truncation of domain IV in the C-terminal dimerization domain of a rice ARF protein, OsARF24. This mutant showed auxin-deficient phenotypes and reduced sensitivity to auxin. However, OsARF24 protein contains an SPL-rich repression domain in its middle region and acts as a transcriptional repressor. These results imply that the C-terminal dimerization domain, especially the C-terminal half of domain IV, is essential for the proper regulation of OsARF24 function as a transcriptional repressor in rice.

KEYWORDS

Auxin; Auxin Response Factor (ARF); Mutant; Phyllotaxis; Retrotransposon Tos17; Rice

Share and Cite:

T. Sakamoto and Y. Inukai, "Characterization of a Tos17 Insertion Mutant of Rice Auxin Signal Transcription Factor Gene, OsARF24," American Journal of Plant Sciences, Vol. 4 No. 1, 2013, pp. 84-91. doi: 10.4236/ajps.2013.41013.

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