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在Caryophyllales中髓束:形式,功能和演变.

Israel L Cunha Neto1,2, Elson Felipe S Rossetto3, Caian S Gerolamo2

  • 1Department of Environmental Studies, New York University, New York, NY, 10012, USA.

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导管血管组织 (CVTP) 在Caryophyllales中多次演变. 脊髓束,一种CVTP,显示结构多样性和增强液压导电性,与更高的工厂多样化率相关联.

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种类: 种类: 种类:相关特征的演变.液压导电性的液压导电性骨髓捆绑 骨髓捆绑国家依赖的多样化多样化.特性演化 特性演化 特性演化血管组织 血管组织

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科学领域:

  • 植物解剖学 植物解剖学
  • 进化生物学是进化的生物学.
  • 人类遗传学 是一个学科.

背景情况:

  • 血管组织在内导导 (CVTP) 是气管细胞的一个显著特征.
  • 骨髓束,一种CVTP形式,在血管精子中多次演变,特别是在Caryophyllales顺序内.
  • 关于髓束的现有数据是碎片化的,这限制了对它们的结构功能关系和进化意义的理解.

研究的目的:

  • 研究Caryophyllales中髓束的多样性,功能,进化和多样化动态.
  • 使用分子标记器构建Caryophyllales的一种族系.
  • 在许多物种和家族中分析骨髓束发生和结构的解剖数据.

主要方法:

  • 用3种塑性质分子标记物 (matK,rbcL和rps16内) 对561种Caryophyllales的遗传学分析.
  • 汇集了40个家族的856个物种的解剖学数据,以记录髓束多样性.
  • 测试神经髓束和连续的变化之间的相关进化.

主要成果:

  • 骨髓束在Caryophyllales中没有祖先,但在各种家族中独立进化.
  • 这些束体具有显著的结构多样性 (数量,排列,类型) 并具有功能活性,改善液压导电性,特别是在草生物种中.
  • 收购神经髓捆绑与增加的多样化率有关,尽管它不仅仅解释了多样化率的异质性.
  • 在Caryophyllales中,CVTP的融合进化是由不同的发育途径驱动的.

结论:

  • 骨髓束是Caryophyllales中功能和比较分子研究的关键领域.
  • 脊髓束的重复进化和功能意义突显了它们在植物适应和多样化中的重要性.
  • 了解中血管组织的进化轨迹,可以了解植物进化和适应策略.