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자료유형
학술저널
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한국식물생명공학회 Journal of Plant Biotechnology Journal of Plant Biotechnology 제43권 제2호
발행연도
2016.1
수록면
231 - 239 (9page)

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To study the transcript levels of epigenetically regulated genes in tobacco, we have developed a transgenic line OX1 overexpressing NtROS2a gene encoding cytosine DNA demethylation and a RNAi plant line RNAi13. It has been reported that salt- and H2O2- stress tolerance of these transgenic lines are enhanced with various phenotypic characters (Lee et al. 2015). In this paper, we conducted microarray analysis with Agilent Tobacco 4 x 44K oligo chip by using overexpression line OX1, RNAi plant line RNAi 13, and wild type plant WT. Differentially expressed genes (DEGs) related to metabolism, nutrient supply, and various stressed were up-regulated by approximately 1.5- to 80- fold. DEGs related to co-enzymes, metabolism, and methylation functional genes were down-regulated by approximately 0.03- to 0.7- fold. qRT-PCR analysis showed that the transcript levels of several candidate genes in OX1 and RNAi lines were significantly (p < 0.05) higher than those in WT, such as genes encoding KH domain-containing protein, MADS-box protein, and Zinc phosphodiesterase ELAC protein. On the other hand, several genes such as those encoding pentatricopeptide (PPR) repeat-containing protein, histone deacetylase HDAC3 protein, and protein kinase were decreased by approximately 0.4- to 1.0- fold. This study showed that NtROS2a gene encoding DNA glycosylase related to demethylation could regulate adaptive response of tobacco at transcriptional level.

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