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首页> 外文期刊>Microbial Ecology >Genetic Diversity of Bacterial Communities of Serpentine Soil and of Rhizosphere of the Nickel-Hyperaccumulator Plant Alyssum bertolonii
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Genetic Diversity of Bacterial Communities of Serpentine Soil and of Rhizosphere of the Nickel-Hyperaccumulator Plant Alyssum bertolonii

机译：镍-超蓄积植物香雪球毒蛇毒土壤和根际细菌群落的遗传多样性

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摘要

Serpentine soils are characterized by high levels of heavy metals (Ni, Co, Cr), and low levels of important plant nutrients (P, Ca, N). Because of these inhospitable edaphic conditions, serpentine soils are typically home to a very specialized flora including endemic species as the nickel hyperaccumulator Alyssum bertolonii. Although much is known about the serpentine flora, few researches have investigated the bacterial communities of serpentine areas. In the present study bacterial communities were sampled at various distances from A. bertolonii roots in three different serpentine areas and their genetic diversity was assessed by terminal restriction fragment length polymorphism (T-RFLP) analysis. The obtained results indicated the occurrence of a high genetic diversity and heterogeneity of the bacterial communities present in the different serpentine areas. Moreover, TRFs (terminal restriction fragments) common to all the investigated A. bertolonii rhizosphere samples were found. A new cloning strategy was applied to 27 TRFs that were sequenced and taxonomically interpreted as mainly belonging to Gram-positive and α-Proteobacteria representatives. In particular, cloned TRFs which discriminated between rhizosphere and soil samples were mainly interpreted as belonging to Proteobacteria representatives.
机译：蛇纹石土壤的特点是重金属含量高（镍，钴，铬），重要植物养分含量低（磷，钙，氮）。由于这些恶劣的环境，蛇形土壤通常是非常特殊的菌丛的家园，其中包括特有物种，如镍超蓄积berylon bertolonii。尽管对蛇形菌群了解很多，但很少有研究调查蛇形区域的细菌群落。在本研究中，在三个不同的蛇形区域中，从距A. bertolonii根不同距离处取样细菌群落，并通过末端限制性片段长度多态性（T-RFLP）分析评估了它们的遗传多样性。获得的结果表明在不同的蛇形区域中存在细菌群落的高度遗传多样性和异质性。此外，还发现了所有研究的bertolonii根际样品共有的TRF（末端限制性片段）。一种新的克隆策略已应用于27个TRF，这些TRF已测序并在分类学上被解释为主要属于革兰氏阳性和α-变形杆菌的代表。特别是，区分根际和土壤样品的克隆TRFs主要被解释为属于变形杆菌的代表。

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  • 来源
    《Microbial Ecology》 |2004年第2期|209-217|共9页
  • 作者

    A. Mengoni; E. Grassi; R. Barzanti; E.G. Biondi; C. Gonnelli; C.K. Kim; M. Bazzicalupo;

  • 作者单位

    Dipartimento di Biologia Animale e Genetica Università di Firenze;

    Dipartimento di Biologia Animale e Genetica Università di Firenze;

    Dipartimento di Biologia Animale e Genetica Università di FirenzeDipartimento di Biologia Vegetale Laboratorio di Fisiologia Vegetale Università di Firenze;

    Dipartimento di Biologia Animale e Genetica Università di Firenze;

    Dipartimento di Biologia Vegetale Laboratorio di Fisiologia Vegetale Università di Firenze;

    Department of Microbiology Chungbuk National University;

    Dipartimento di Biologia Animale e Genetica Università di Firenze;

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