Scholarlink

<p>The extreme environments of Antarctica offer unique habitats for microbial life, fostering distinct ecological interactions, including antagonism among bacteria. This study investigates the antagonistic interactions and volatile organic compounds (VOCs) production of psychrotrophic bacterial strains belonging to the genera <i>Pseudoalteromonas</i> and <i>Psychrobacter</i>, isolated from seawater and marine sponges. Antagonism assays revealed that only a small fraction of isolates exhibited significant inhibitory activity, with seawater strains showing a greater antagonistic potential than sponge-associated ones. Inhibition and sensitivity patterns were influenced by both the ecological origin and phylogenetic relatedness of the strains, particularly within the <i>Pseudoalteromonas</i> genus. SPME-GC/MS analyses identified sulfurated compounds such as dimethyl and trimethyl disulfide, along with 2-undecanone, as prominent VOCs produced by the strains. Although antagonistic activity was generally low, VOCs from these strains have demonstrated potential inhibitory effects on pathogens, including multidrug-resistant <i>Staphylococcus</i> spp. and <i>Pseudomonas aeruginosa</i> strains. These findings highlight the ecological and biotechnological relevance of Antarctic bacteria VOCs, shedding light on their potential as bioactive compounds for applications in agriculture and pharmaceutical fields.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Antagonistic interactions among Antarctic bacteria: phylogenetic and niche-based insights into bacterial communities dynamics

  • 期刊论文

  • 发表日期：

    2025年2月20日

查看全文
  • Giulia Semenzato,
  • Fabiola Berti,
  • Josselyn Stefania Cusme Valle,
  • Elena Perrin,
  • Angela Bechini,
  • Carmela Calonico,
  • Valentina Catania,
  • Antonio Palumbo Piccionello,
  • Anna Maria Puglia,
  • Renato Fani

摘要

The extreme environments of Antarctica offer unique habitats for microbial life, fostering distinct ecological interactions, including antagonism among bacteria. This study investigates the antagonistic interactions and volatile organic compounds (VOCs) production of psychrotrophic bacterial strains belonging to the genera Pseudoalteromonas and Psychrobacter, isolated from seawater and marine sponges. Antagonism assays revealed that only a small fraction of isolates exhibited significant inhibitory activity, with seawater strains showing a greater antagonistic potential than sponge-associated ones. Inhibition and sensitivity patterns were influenced by both the ecological origin and phylogenetic relatedness of the strains, particularly within the Pseudoalteromonas genus. SPME-GC/MS analyses identified sulfurated compounds such as dimethyl and trimethyl disulfide, along with 2-undecanone, as prominent VOCs produced by the strains. Although antagonistic activity was generally low, VOCs from these strains have demonstrated potential inhibitory effects on pathogens, including multidrug-resistant Staphylococcus spp. and Pseudomonas aeruginosa strains. These findings highlight the ecological and biotechnological relevance of Antarctic bacteria VOCs, shedding light on their potential as bioactive compounds for applications in agriculture and pharmaceutical fields.