Comparative mitochondrial genomics of Thelebolaceae in Antarctica: insights into their extremophilic adaptations and evolutionary dynamics.

IF 5.2 1区 生物学 Q1 MYCOLOGY
Zechen Mi, Jing Su, Liyan Yu, Tao Zhang
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引用次数: 0

Abstract

Species of Antarctomyces and Thelebolus (Thelebolaceae), primarily found in Antarctic environments, exhibit psychrophilic adaptations, yet their mitochondrial genomes have not been extensively studied. Furthermore, few studies have compared the mitochondrial genomes of psychrophilic, psychrotrophic, and mesophilic fungi. After successful sequencing and assembly, this study annotated the mitochondrial genomes of Antarctomyces psychrotrophicus CPCC 401038 and Thelebolus microsporus CPCC 401041. We also performed a comparative analysis with the previously characterized mitochondrial genomes of psychrotrophic and mesophilic fungi. The analysis revealed that nad4L was the most conserved gene across the mitochondrial genomes, characterized by its synonymous and non-synonymous substitution rates (Ks and Ka), genetic distance, and GC content and skew within the protein-coding genes (PCGs). Additionally, the mitochondrial genomes of psychrophilic and psychrotrophic fungi showed a higher proportion of protein-coding regions and a lower GC content compared to those of mesophilic fungi, underscoring the genetic basis of cold adaptation. Phylogenetic analyses based on these mitochondrial genes also confirmed the phylogenetic relationships of Thelebolaceae in the class Leotiomycetes. These findings advance our understanding of the phylogenetic relationships and evolutionary dynamics within the family Thelebolaceae, highlighting how different environmental temperatures influence fungal mitochondrial genomic structure and adaptation.

南极蝶形花的线粒体比较基因组学:对其嗜极端环境适应性和进化动态的见解。
主要存在于南极环境中的南极酵母菌和嗜水木真菌(Thelebolaceae)的物种具有心理亲水适应性,但它们的线粒体基因组尚未得到广泛研究。此外,很少有研究对嗜心理真菌、嗜心理真菌和中嗜真菌的线粒体基因组进行比较。在成功测序和组装之后,本研究注释了嗜心理营养型南极真菌 CPCC 401038 和微孢子南极真菌 CPCC 401041 的线粒体基因组。我们还与之前表征的精神营养真菌和中嗜热真菌的线粒体基因组进行了比较分析。分析结果表明,nad4L 是线粒体基因组中最保守的基因,其特点包括同义和非同义替换率(Ks 和 Ka)、遗传距离以及蛋白质编码基因(PCGs)中的 GC 含量和倾斜度。此外,与中嗜热真菌相比,嗜心理真菌和嗜心理真菌的线粒体基因组显示出更高的蛋白质编码区比例和更低的 GC 含量,这突显了冷适应的遗传基础。基于这些线粒体基因的系统发育分析也证实了嗜冷真菌门(Thelebolaceae)在列真菌门(Leotiomycetes)中的系统发育关系。这些发现加深了我们对鹅掌楸科的系统发育关系和进化动态的了解,突出了不同环境温度如何影响真菌线粒体基因组结构和适应性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Ima Fungus
Ima Fungus Agricultural and Biological Sciences-Agricultural and Biological Sciences (miscellaneous)
CiteScore
11.00
自引率
3.70%
发文量
18
审稿时长
20 weeks
期刊介绍: The flagship journal of the International Mycological Association. IMA Fungus is an international, peer-reviewed, open-access, full colour, fast-track journal. Papers on any aspect of mycology are considered, and published on-line with final pagination after proofs have been corrected; they are then effectively published under the International Code of Nomenclature for algae, fungi, and plants. The journal strongly supports good practice policies, and requires voucher specimens or cultures to be deposited in a public collection with an online database, DNA sequences in GenBank, alignments in TreeBASE, and validating information on new scientific names, including typifications, to be lodged in MycoBank. News, meeting reports, personalia, research news, correspondence, book news, and information on forthcoming international meetings are included in each issue
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