糖
基因
非生物胁迫
蔗糖
生物
调节器
基因表达
转基因水稻
非生物成分
抄写(语言学)
细胞生物学
转录因子
激素
转录调控
转基因
植物
生物化学
转基因作物
生态学
语言学
哲学
作者
Joungsu Joo,Youn Hab Lee,Yeon-Ki Kim,Baek Hie Nahm,Sang Ik Song
出处
期刊:Molecules and Cells
[Korean Society for Molecular and Cellular Biology]
日期:2013-04-30
卷期号:35 (5): 421-435
被引量:78
标识
DOI:10.1007/s10059-013-0036-7
摘要
The expression of the six rice ASR genes is differentially regulated in a tissue-dependent manner according to environmental conditions and reproductive stages. OsASR1 and OsASR3 are the most abundant and are found in most tissues; they are enriched in the leaves and roots, respectively. Coexpression analysis of OsASR1 and OsASR3 and a comparison of the cis-acting elements upstream of OsASR1 and OsASR3 suggested that their expression is regulated in common by abiotic stresses but differently regulated by hormone and sugar signals. The results of quantitative real-time PCR analyses of OsASR1 and OsASR3 expression under various conditions further support this model. The expression of both OsASR1 and OsASR3 was induced by drought stress, which is a major regulator of the expression of all ASR genes in rice. In contrast, ABA is not a common regulator of the expression of these genes. OsASR1 transcription was highly induced by ABA, whereas OsASR3 transcription was strongly induced by GA. In addition, OsASR1 and OsASR3 expression was significantly induced by sucrose and sucrose/glucose treatments, respectively. The induction of gene expression in response to these specific hormone and sugar signals was primarily observed in the major target tissues of these genes (i.e., OsASR1 in leaves and OsASR3 in roots). Our data also showed that the overexpression of either OsASR1 or OsASR3 in transgenic rice plants increased their tolerance to drought and cold stress. Taken together, our results revealed that the transcriptional control of different rice ASR genes exhibit different tissue-dependent sugar and hormone-sensitivities.
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