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首页> 外文期刊>Journal of Experimental Botany >Diverse trajectories of plastome degradation in holoparasitic Cistanche and genomic location of the lost plastid genes
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Diverse trajectories of plastome degradation in holoparasitic Cistanche and genomic location of the lost plastid genes

机译：血管基肌岩血管基因的塑性降解的多种轨迹和丢失的塑体基因的基因组位置

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摘要

The plastid genomes (plastomes) of non-photosynthetic plants generally undergo gene loss and pseudogenization. Despite massive plastomes reported in different parasitism types of the broomrape family (Orobanchaceae), more plastomes representing different degradation patterns in a single genus are expected to be explored. Here, we sequence and assemble the complete plastomes of three holoparasitic Cistanche species (C. salsa, C. mongolica, and C. sinensis) and compare them with the available plastomes of Orobanchaceae. We identified that the diverse degradation trajectories under purifying selection existed among three Cistanche clades, showing obvious size differences in the entire plastome, long single copy region, and non-coding region, and different patterns of the retention/loss of functional genes. With few exceptions of putatively functional genes, massive plastid fragments, which have been lost and transferred into the mitochondrial or nuclear genomes, are non-functional. In contrast to the equivalents of the Orobanche species, some plastid-derived genes with diverse genomic locations are found in Cistanche. The early and initially diverged clades in different genera such as Cistanche and Aphyllon possess obvious patterns of plastome degradation, suggesting that such key lineages should be considered prior to comparative analysis of plastome evolution, especially in the same genus.
机译：非光合植物的塑性基因组（塑料）通常经历基因损失和假性化化。尽管在不同寄生术类型（Orobanchaceae）中报告的巨大塑料，但预期探讨了在单个属中的不同降解模式的更多塑性。在此，我们序列和组装三种全洛山西岩岩石种类的完全塑性（C. Salsa，C. Mongolica和C. sinensis），并将它们与Orobanchaceae的可用塑料进行比较。我们确定，在三个岩手型片状中存在净化选择的多样化轨迹，显示整个塑料，长单拷贝区域和非编码区的明显尺寸差异，以及功能基因的保留/损失的不同模式。少数少量官能基因，丢失并转移到线粒体或核基因组中的大规模体层片段是非功能性的。与奥博比物种的等同物相比，在岩树中发现了一些具有不同基因组位置的塑性衍生的基因。诸如脊柱和异形的不同包膜中的早期和最初分歧的植物具有明显的塑性降解模式，表明在塑性进化的比较分析之前应考虑这种关键谱系，特别是在相同的属中。

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  • 来源
    《Journal of Experimental Botany》 |2020年第3期|共16页
  • 作者

    Liu Xiaoqing; Fu Weirui; Tang Yiwei; Zhang Wenju; Song Zhiping; Li Linfeng; Yang Ji; Ma Hong; Yang Jianhua; Zhou Chan; Davis Charles C.; Wang Yuguo;

  • 作者单位

    Fudan Univ Sch Life Sci Inst Biodivers Sci Minist Educ Key Lab Biodivers Sci &

    Ecol Engn Shanghai 200433 Peoples R China;

    Fudan Univ Sch Life Sci Inst Biodivers Sci Minist Educ Key Lab Biodivers Sci &

    Ecol Engn Shanghai 200433 Peoples R China;

    Fudan Univ Sch Life Sci Inst Biodivers Sci Minist Educ Key Lab Biodivers Sci &

    Ecol Engn Shanghai 200433 Peoples R China;

    Fudan Univ Sch Life Sci Inst Biodivers Sci Minist Educ Key Lab Biodivers Sci &

    Ecol Engn Shanghai 200433 Peoples R China;

    Fudan Univ Sch Life Sci Inst Biodivers Sci Minist Educ Key Lab Biodivers Sci &

    Ecol Engn Shanghai 200433 Peoples R China;

    Fudan Univ Sch Life Sci Inst Biodivers Sci Minist Educ Key Lab Biodivers Sci &

    Ecol Engn Shanghai 200433 Peoples R China;

    Fudan Univ Sch Life Sci Inst Biodivers Sci Minist Educ Key Lab Biodivers Sci &

    Ecol Engn Shanghai 200433 Peoples R China;

    Fudan Univ Ctr Evolutionary Biol Sch Life Sci Inst Plant Biol State Key Lab Genet Engn Shanghai 200433 Peoples R China;

    Xinjiang Med Univ Affiliated Hosp 1 Coll Pharm Urumqi 830011 Peoples R China;

    Massachusetts Gen Hosp Dept Populat &

    Quantitat Hlth Sci 55 Lake Ave North Worcester MA 01605 USA;

    Harvard Univ Herbaria Dept Organism &

    Evolutionary Biol 22 Divin Ave Cambridge MA 02138 USA;

    Fudan Univ Sch Life Sci Inst Biodivers Sci Minist Educ Key Lab Biodivers Sci &

    Ecol Engn Shanghai 200433 Peoples R China;

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  • 正文语种 eng
  • 中图分类 植物学;
  • 关键词

    Cistanche; degradation; gene loss; intracellular gene transfer; plastome; pseudogenization;

    机译：c c;降解;基因损失;细胞内基因转移;塑料;伪原算;

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