Rice homologs of inducer of CBF expression (OsICE) are involved in cold acclimation
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概要
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Cold stress on crops results in severe yield losses through growth retardation and irreversible damage. Recently, Inducer of CBF Expression 1 (ICE1) was identified as the master regulator inducing dehydration responsive element binding protein/C-repeat binding factor (DREB/CBF)-type transcriptional factors involved in the signaling of cold and osmotic stress in Arabidopsis. To examine whether rice ICE homologs function in cold acclimation via regulation of rice DREB homologs in response to cold stress, we assessed a polypeptide epitope containing an ICE-specific motif. Chilling stress on rice seedlings induced two ICE-related proteins with molecular masses of approximately 55 and 40 kDa. These sizes are consistent with those predicted for OsICE1 and OsICE2, respectively. In contrast to the proteins, cold stress had little or no effect on the expression of OsICE1 and OsICE2. Semi-quantitative RT-PCR indicated that both were constantly expressed, but that cold stress sequentially upregulated OsDREB1B, rice heat shock factor A3 (OsHsfA3), and trehalose-6-phosphate phosphatase (OsTPP1). Trehalose treatment enhanced the cold tolerance of seedlings. These results suggest that OsICE homologs function in transcriptional regulation at upstream of a cold-stress-induced transcription factor cascade involving OsDREB1B and OsHsfA3, leading to cold acclimation, possibly involving trehalose synthesis.
- 日本植物細胞分子生物学会の論文
著者
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TANAKA Sho
Graduate School of Bioscience, Tokai University
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YUASA Takashi
Department of Plant Resources, Faculty of Agriculture, Kyushu University
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Tanaka Sho
Graduate School Of Bioscience Tokai University
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Phan Thuy
Graduate School Of Bioresource And Bioenvironmental Science Kyushu University
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Iwaya-Inoue Mari
Department of Plant Resources, Graduate School of Bioresource and Bioenvironmental Science, Kyushu U
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Yuasa Takashi
Department Of Life Sciences Graduate School Of Arts And Sciences The University Of Tokyo
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Nakamura Junya
Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University
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Huong Tran
Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University
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Harano Keisuke
School of Agriculture, Kyushu University
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Iwata Tomoe
School of Agriculture, Kyushu University
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Iwaya Mari
Department of Bioresource Sciences, Faculty of Agriculture, Kyushu University
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Yamauchi Takashi
Department Of Bioresources Sciences Faculty Of Agriculture Kyushu University
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Iwaya-inoue Mari
Department Of Plant Resources Faculty Of Agriculture Kyushu University
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Tanaka Sho
Graduate School Of Bioresource And Bioenvironmental Sciences Kyushu University
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Huong Tran
Graduate School Of Bioresource And Bioenvironmental Sciences Kyushu University
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