Scholarlink

Background <p>Inter-kingdom interactions between arbuscular mycorrhizal fungi (AMF) and bacteria are increasingly recognized for their potential to enhance fertilizer use efficiency in agroecosystems. Here, we investigated the effects of rock phosphate amendment and AMF inoculation on phosphorus (P) nutrition in leek (<i>Allium porrum</i> L.), as well as on bacterial communities associated with AMF extraradical mycelium. A bi-compartmental microcosm was used to disentangle root-derived effects from those mediated by AMF mycelium.</p> Results <p>Inoculation with <i>Rhizophagus irregularis</i> significantly increased total plant biomass (<i>p</i> &lt; 0.001), while rock phosphate amendment enhanced arbuscule abundance in roots (<i>p</i> = 0.03), leading to higher shoot P content (<i>p</i> = 0.013) and photosynthetic activity (<i>p</i> &lt; 0.0001). Because rock phosphate was the sole P source, these results indicate that P solubilized in the soil was translocated to the host plant via the mycorrhizal pathway. Rock phosphate amendment also significantly altered the composition of bacterial communities associated with AMF mycelium (<i>p</i> = 0.01). Across treatments, bacterial assemblages were dominated by Planctomycetota, Pseudomonadota, Chloroflexota, and Bacillota, with enrichment of <i>Planctomyces</i> and <i>Gemmata</i> in AMF mycelium, and <i>Planctomyces</i>, <i>Gemmata</i>, and <i>Bacillus</i> in soil. The core bacteriome associated with <i>R. irregularis</i> was primarily composed of Planctomycetota and Bacillota, taxa known to form biofilms on AMF extraradical hyphae.</p> Conclusion <p>These findings demonstrate the pivotal role of mycorrhizal symbiosis in enhancing P acquisition from rock phosphate and provide new insights into AMF–bacteria interactions that are relevant for developing sustainable fertilization strategies.</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

Effects of rock phosphate on arbuscular mycorrhizal fungi-associated bacterial communities and their contribution to phosphorus acquisition in leek

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月10日

查看全文
  • Zakaria Lahrach,
  • Jean Legeay,
  • Bulbul Ahmed,
  • Mohamed Hijri

摘要

Background

Inter-kingdom interactions between arbuscular mycorrhizal fungi (AMF) and bacteria are increasingly recognized for their potential to enhance fertilizer use efficiency in agroecosystems. Here, we investigated the effects of rock phosphate amendment and AMF inoculation on phosphorus (P) nutrition in leek (Allium porrum L.), as well as on bacterial communities associated with AMF extraradical mycelium. A bi-compartmental microcosm was used to disentangle root-derived effects from those mediated by AMF mycelium.

Results

Inoculation with Rhizophagus irregularis significantly increased total plant biomass (p < 0.001), while rock phosphate amendment enhanced arbuscule abundance in roots (p = 0.03), leading to higher shoot P content (p = 0.013) and photosynthetic activity (p < 0.0001). Because rock phosphate was the sole P source, these results indicate that P solubilized in the soil was translocated to the host plant via the mycorrhizal pathway. Rock phosphate amendment also significantly altered the composition of bacterial communities associated with AMF mycelium (p = 0.01). Across treatments, bacterial assemblages were dominated by Planctomycetota, Pseudomonadota, Chloroflexota, and Bacillota, with enrichment of Planctomyces and Gemmata in AMF mycelium, and Planctomyces, Gemmata, and Bacillus in soil. The core bacteriome associated with R. irregularis was primarily composed of Planctomycetota and Bacillota, taxa known to form biofilms on AMF extraradical hyphae.

Conclusion

These findings demonstrate the pivotal role of mycorrhizal symbiosis in enhancing P acquisition from rock phosphate and provide new insights into AMF–bacteria interactions that are relevant for developing sustainable fertilization strategies.