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Analysis of gene expression and histone modification between C-4 and non-C-4 homologous genes of PPDK and PCK in maize

文献类型： 外文期刊

作者： Dong, Xiu-mei 1 ; Li, Yuan 2 ; Chao, Qing 1 ; Shen, Jie 1 ; Gong, Xiu-jie 3 ; Zhao, Biligen-gaowa 1 ; Wang, Bai-chen 1 ;

作者机构： 1.Chinese Acad Sci, Inst Bot, Photosynth Res Ctr, Key Lab Photobiol, 20 Nanxincun, Beijing 100093, Peoples R China

2.Northeast Forestry Univ, State Key Lab Forest Genet & Tree Breeding, Harbin 150040, Heilongjiang, Peoples R China

3.Heilongjiang Acad Agr Sci, Inst Crop Cultivat & Farming, Harbin 150086, Heilongjiang, Peoples R China

4.Univ Chinese Acad Sci, Beijing 100093, Peoples R China

关键词： C-4 genes;Non-C-4 homologous genes;PPDK;PCK;Gene expression;Histone modification

期刊名称：PHOTOSYNTHESIS RESEARCH （ 影响因子：3.573； 五年影响因子：3.674 ）

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收录情况： SCI

摘要： More efficient photosynthesis has allowed C-4 plants to adapt to more diverse ecosystems (such as hot and arid conditions) than C-3 plants. To better understand C-4 photosynthesis, we investigated the expression patterns of C-4 genes (C4PPDK and PCK1) and their non-C-4 homologous genes (CyPPDK1, CyPPDK2, and PCK2) in the different organs of maize (Zea mays). Both C-4 genes and non-C-4 genes showed organ-dependent expression patterns. The mRNA levels of C-4 genes were more abundant in leaf organ than in seeds at 25 days after pollination (DAP), while non-C-4 genes were mainly expressed in developing seeds. Further, acetylation of histone H3 lysine 9 (H3K9ac) positively correlates with mRNA levels of C-4 genes (C4PPDK and PCK1) in roots, stems, leaves, and seeds at 25 DAP, acetylation of histone H4 lysine 5 (H4K5ac) in the promoter regions of both C-4 (C4PPDK and PCK1) and non-C-4 genes (CyPPDK1, CyPPDK2, and PCK2) correlated well with their transcripts abundance in stems. In photosynthetic organs (stems and leaves), dimethylation of histone H3 lysine 9 (H3K9me2) negatively correlated with mRNA levels of both C-4 and non-C-4 genes. Taken together, our data suggest that histone modification was involved in the transcription regulation of both C-4 genes and non-C-4 genes, which might provide a clue of the functional evolution of C-4 genes.

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