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JXB Advance Access published online on March 12, 2004
Journal of Experimental Botany, doi:10.1093/jxb/erh110
© 2004 by Oxford University Press
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Received December 16, 2003; accepted January 21, 2004
© 2004 Society for Experimental Biology

GENE NOTE

Cloning of a cDNA encoding an ETR2-like protein (Os-ERL1) from deep water rice (Oryza sativa L.) and increase in its mRNA level by submergence, ethylene, and gibberellin treatments

Hajime Watanabe 1*, Masahiko Saigusa 1, Shu Hase 2, Toshihiko Hayakawa 2, and Shigeru Satoh 2

1 Division of Biological Resource Science, Graduate School of Agricultural Science, Tohoku University, Kawatabi, Naruko Miyagi 989-6711, Japan
2 Division of Life Science, Graduate School of Agricultural Science, Tohoku University, Sendai, Miyagi 981-8555 Japan

* To whom correspondence should be addressed. E-mail: watanabe{at}bios.tohoku.ac.jp.


  Abstract

A cDNA from deep water rice treated with ethylene, encoding an ethylene receptor homologous to Arabidopsis thaliana ETR2 and EIN4, was isolated using differential display and RACE techniques. The cDNA (2880 bp), corresponding to the Os-ERL1 gene (Oryza sativa ETHYLENE RESPONSE 2 like 1; GenBank accession number AB107219), contained an open reading frame of 2289 bp coding for 763 amino acids. The protein Os-ERL1 has 50% and 52% similarity to Arabidopsis ETR2 and EIN4, respectively. The Os-ERL1 gene was up-regulated by flooding, and by treatment with ethylene and gibberellin. These results suggest that deep water rice responds to flooding by increasing the number of its ethylene receptors.

Key words: Deep water rice (Oryza sativa L.), differential display, ethylene receptor, gibberellin, internode elongation, submergence.


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