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Dynamic gene amplification and function diversification of grass-specific O-methyltransferase gene family

机译：基于草地O-甲基转移酶基因家族的动态基因扩增和功能多样化

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The plant O-methyltransferases are dependent on S-Adenosyl-l-methionine, which can catalyze a variety of secondary metabolites. Here we identified different number of OMT genes from the respective grass genomes. Phylogenetic analysis showed that this OMT gene family is a grass-specific gene family that is different from COMT. Most of genes were expanded by tandem and segment duplication after the species split from their progenitor. Furthermore, genes from Group I and two clusters from group II are only present in Panicoideae, which included Bx10 and Bx7 involved in the benzoxazinoids pathway, suggesting these genes could participate in insect resistance in Panicoideae. Gene expression profiles showed that OMT genes were preferentially expressed in vegetative stages, especially in roots. These results revealed that this grass-specific OMT gene family could affect the development of vegetative stages, and be involved in the benzoxazinoids pathway or suberin biosynthesis that was different from COMT.
机译：植物O-甲基转移酶取决于S-腺苷-1-甲硫氨酸，其可以催化各种次级代谢物。在这里，我们鉴定了来自各种草基因组的不同数量的OMT基因。系统发育分析表明，该OMT基因家族是一种不同于COMT的特异性基因系列。大部分基因被串联和分段复制在祖先的物种中串联扩增。此外，来自II组的基团的基因仅存在于胰腺炎中，其中包括参与苯并恶嗪型途径的BX10和BX7，表明这些基因可以参与胰腺炎的抗虫性。基因表达谱表明OMT基因优先在营养阶段表达，尤其是根部。这些结果表明，这种特异性的OMT基因家族可能影响营养阶段的发展，并参与苯并恶化途径或与COMT不同的Suberin生物合成。

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