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자료유형
학술저널
저자정보
Jeong, Hae-Jun (Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University) Kwon, Ye-Rim (Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University) Oh, Jee-Eun (Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University) Kim, Ki-Deok (Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University) Lee, Sung-Joon (Department of Food Science, College of Life and Environmental Sciences, Korea University) Hong, Suk-Whan (Division of Applied Plant Science, College of Agriculture and Life Sciences, Chonnam National University) Lee, Ho-Joung (Division of Biotechnology, College of Life Sciences and Biotechnology, Korea University)
저널정보
한국응용생명화학회 Applied Biological Chemistry Applied Biological Chemistry 제49권 제4호
발행연도
2006.1
수록면
148 - 153 (6page)

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While the underlying molecular mechanism remains to be elucidated, recent studies suggest that polar auxin transport is a key controlling factor in triggering differential growth responses to gravity. Identification of regulatory components in auxin-mediated differential cell expansion would improve our understanding of the gravitropic response. In this study, we identify a mutant designated aux1-like(later changed to aux1), an allele of the aux1 mutant that exhibits a severely disrupted root gravitropic response, but no defects in developmental processes. In Arabidopsis, AUX1 encodes an auxin influx carrier. Since in-depth characterization of the gravitropic response caused by mutations in this gene has been performed previously, we focused on identifying the downstream genes that were differentially expressed compared to wild-type plants. Consistent with the mutant phenotype, the transcription of the auxin-responsive genes IAA17 and GH3 were altered in aux1 plants treated with IAA, 2, 4-D and NAA. In addition, we identified two expansin genes EXP10 and EXPL3 that exhibited different expression in wild-type and mutant plants.

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