Complete genome sequence of the nitrogen-fixing bacterium Azospirillum humicireducens type strain SgZ-5^T.

Q3 Biochemistry, Genetics and Molecular Biology

Standards in Genomic Sciences Pub Date : 2018-10-16 eCollection Date: 2018-01-01 DOI:10.1186/s40793-018-0322-2

Zhen Yu, Guiqin Yang, Xiaoming Liu, Yueqiang Wang, Li Zhuang, Shungui Zhou

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Abstract

The Azospirillum humicireducens strain SgZ-5^T, belonging to the Order Rhodospirillales and the Family Rhodospirillaceae, was isolated from a microbial fuel cell inoculated with paddy soil. A previous work has shown that strain SgZ-5^T was able to fix atmospheric nitrogen involved in plant growth promotion. Here we present the complete genome of A. humicireducens SgZ-5^T, which consists of a circular chromosome and six plasmids with the total genome size of 6,834,379 bp and the average GC content of 67.55%. Genome annotations predicted 5969 protein coding and 85 RNA genes including 14 rRNA and 67 tRNA genes. By genomic analysis, we identified a complete set of genes that is potentially involved in nitrogen fixation and its regulation. This genome also harbors numerous genes that are likely responsible for phytohormones production. We anticipate that the A. humicireducens SgZ-5^T genome will contribute insights into plant growth promoting properties of Azospirillum strains.

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固氮菌 Azospirillum humicireducens 型菌株 SgZ-5T 的完整基因组序列。

从接种于稻田土壤的微生物燃料电池中分离出了腐殖螺旋体菌株 SgZ-5T，该菌株隶属于 Rhodospirillales 目和 Rhodospirillaceae 科。之前的一项研究表明，菌株 SgZ-5T 能够固定大气中的氮，从而促进植物生长。该基因组由一个环状染色体和六个质粒组成，基因组总大小为 6,834,379 bp，平均 GC 含量为 67.55%。基因组注释预测了 5969 个蛋白质编码基因和 85 个 RNA 基因，包括 14 个 rRNA 和 67 个 tRNA 基因。通过基因组分析，我们发现了一整套可能参与固氮及其调控的基因。该基因组还包含许多可能负责产生植物激素的基因。我们预计，A. humicireducens SgZ-5T 基因组将有助于深入了解氮螺旋体菌株促进植物生长的特性。

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