Scholarlink

Background <p>Arbuscular mycorrhizal fungi (AMF) are beneficial microorganisms establishing symbioses with the roots of most plants, supporting their nutrition and health, mainly in nutrient-poor and harsh environments. AMF spores host diverse bacterial communities whose distribution in the different taxa is poorly understood. To this aim we determined the entire diversity of spore associated bacteria thriving in <i>Ammophila arenaria</i> rhizosphere from Mediterranean maritime sand dunes by Illumina sequencing.</p> Results <p>The two most abundant AMF species, <i>Racocetra fulgida</i> and <i>Racocetra persica</i> disclosed a highly heterogeneous composition of spore bacterial communities. The endosymbiont <i>Ca</i>. Moeniiplasma glomeromycotorum was abundant in both AMF species and detected in <i>R. fulgida</i> for the first time. <i>Ca</i>. Glomeribacter gigasporarum was present only in <i>R. persica</i>. Distinct highly diversified spore-associated bacterial communities were also identified, with 251 Amplicon Sequence Variants (ASVs) affiliated to 69 and 34 genera in case of <i>R. persica</i> and <i>R. fulgida</i>, respectively. The regular detection of Actinomycetota confirmed a relatively stable relationship with AMF spores. Most of the identified bacteria belonged to culturable genera and species, reported to possess key beneficial activities.</p> Conclusions <p>Our study showed that different AMF genotypes differentially recruited highly diversified and rich spore associated bacterial communities in a natural sand dune system. The isolation in pure culture of such bacteria could boost in-depth studies aimed at revealing their functional role in the complex interactions between AMF, associated bacteria and host plants and their possible exploitation in harsh agroecosystems.</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

Spore associated bacterial communities display patterns related to the arbuscular mycorrhizal host genotype in Mediterranean sand dunes

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年2月11日

查看全文
  • Arianna Grassi,
  • Irene Pagliarani,
  • Giorgia Cantini,
  • Luciano Avio,
  • Manuela Giovannetti,
  • Monica Agnolucci,
  • Alessandra Turrini

摘要

Background

Arbuscular mycorrhizal fungi (AMF) are beneficial microorganisms establishing symbioses with the roots of most plants, supporting their nutrition and health, mainly in nutrient-poor and harsh environments. AMF spores host diverse bacterial communities whose distribution in the different taxa is poorly understood. To this aim we determined the entire diversity of spore associated bacteria thriving in Ammophila arenaria rhizosphere from Mediterranean maritime sand dunes by Illumina sequencing.

Results

The two most abundant AMF species, Racocetra fulgida and Racocetra persica disclosed a highly heterogeneous composition of spore bacterial communities. The endosymbiont Ca. Moeniiplasma glomeromycotorum was abundant in both AMF species and detected in R. fulgida for the first time. Ca. Glomeribacter gigasporarum was present only in R. persica. Distinct highly diversified spore-associated bacterial communities were also identified, with 251 Amplicon Sequence Variants (ASVs) affiliated to 69 and 34 genera in case of R. persica and R. fulgida, respectively. The regular detection of Actinomycetota confirmed a relatively stable relationship with AMF spores. Most of the identified bacteria belonged to culturable genera and species, reported to possess key beneficial activities.

Conclusions

Our study showed that different AMF genotypes differentially recruited highly diversified and rich spore associated bacterial communities in a natural sand dune system. The isolation in pure culture of such bacteria could boost in-depth studies aimed at revealing their functional role in the complex interactions between AMF, associated bacteria and host plants and their possible exploitation in harsh agroecosystems.