Cloning of a Cytochrome P450 Gene Induced by Ethylene Treatment in Deepwater Rice (Oryza sativa L.)(Crop Physiology & Ecology)

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概要

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• Deepwater rice (Oryza sativa L.) is a subsistence crop in some areas of Southeast Asia which is flooded during the rainy season. This rice is of great agricultural importance, since it is the only crop that can be grown in this area. Therefore, an understanding of the growth physiology of deepwater rice is significant. Survival of this rice depends on elongating rate when it becomes submerged. In the field, growth rates of up to 25cm d^<-1> have been recorded (Vergara et al., 1976). It has been reported that submerged plants respond to an altered internal gas atmosphere (Kende et al., 1998). Ethylene production is required for the stimulation of growth in submerged deepwater rice plant, and in fact, exogenously applied ethylene enhances internodal elongation of deepwater rice (Metraux and Kende, 1983). In plants, cytochrome P450 constituted the largest group of enzymes associated with syntheses and metabolism of including second metabolites and plant hormone, such as gibberellin (Donaldson and Luster, 1991 ; Rojas et al., 2001) and brassinolide (Sakamoto and Matsuoka, 2006). However, knowledge regarding the role of cytochrome P450 in internode elongation of deepwater rice in terms of ethylene physiology has not yet been known. We have already isolated an Os-ERL1 gene from deepwater rice encoding an ethylene receptor gene, similar to those of Arabidopsis thariana ETR2 and EIN4 (Watanabe et al., 2004). In addition to the previous report (Watanabe et al., 2004), to understand the regulation of growth in deepwater rice in detail, we here isolated a cDNA clone for the first time encoding for the cytochrome P450 gene whose expression was increased by ethylene treatment in deepwater rice.

• 日本作物学会の論文

著者

• WATANABE Hajime

  Graduate School of Information Science, Nara Institute of Science and Technology

• Kende Hans

  MSU-DOE Plant Research Laboratory, Michigan State University

• Saigusa Masahiko

  Toyohashi University Of Technology

• Hayakawa Toshihiko

  Division Of Life Science Graduate School Of Agricultural Science Tohoku University

• Kende Hans

  Msu-doe Plant Research Laboratory Michigan State University

• Watanabe Hajime

  Graduate School Of Agricultural Science Tohoku University:(present Office)faculty Of Agriculture Nii

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