Mikania micrantha genome provides insights into the molecular mechanism of rapid growth
Mikania micrantha genome provides insights into the molecular mechanism of rapid growth
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DOI：
10.1038/s41467-019-13926-4
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发表时间：
2020-01-17
影响因子：
16.6
通讯作者：
Wan, Fanghao
中科院分区：
文献类型：
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作者：
Liu, Bo;Yan, Jian;Wan, Fanghao
薇甘菊是100种最严重的入侵物种之一，会对自然生态系统造成严重破坏和巨大的经济损失。在这里，我们展示了1.79Gb的染色体尺度参考基因组。基因组的一半是由长末端重复反转录转座子组成的，其中80%是在过去100万年的显著扩张中产生的。我们确定了一个全基因组复制事件和最近的片段复制，这可能是其快速适应环境的原因。此外，我们发现薇甘菊通过在夜间吸收二氧化碳来补充白天的碳固定，从而获得更高的光合能力，并提高了茎部的光合效率。此外，薇甘菊的代谢物可以通过丰富参与氮循环途径的微生物来增加氮的有效性。这些发现共同提供了对快速生长和侵入性适应的见解。薇甘菊是一种生长极快的入侵植物，会对自然生态系统造成严重破坏。在这里，作者组装其染色体尺度的参考基因组和探索可能的机制，有助于其快速增长。
Mikania micrantha is one of the top 100 worst invasive species that can cause serious damage to natural ecosystems and substantial economic losses. Here, we present its 1.79Gb chromosome-scale reference genome. Half of the genome is composed of long terminal repeat retrotransposons, 80% of which have been derived from a significant expansion in the past one million years. We identify a whole genome duplication event and recent segmental duplications, which may be responsible for its rapid environmental adaptation. Additionally, we show that M. micrantha achieves higher photosynthetic capacity by CO2 absorption at night to supplement the carbon fixation during the day, as well as enhanced stem photosynthesis efficiency. Furthermore, the metabolites of M. micrantha can increase the availability of nitrogen by enriching the microbes that participate in nitrogen cycling pathways. These findings collectively provide insights into the rapid growth and invasive adaptation.Mikania micrantha is an extremely fast-growing invasive plant species that can cause serious damage to natural ecosystems. Here, the authors assemble its chromosome-scale reference genome and explore possible mechanisms that contribute to its rapid growth.