Cymbopogon citratus (lemongrass) is an important medicinal and aromatic plant containing citral-rich essential oil, of which the quality and quantity may be affected by nematode infection. Research has shown that arbuscular mycorrhizal fungi (AMF) may act as nematode biocontrol agents and improve the chemical composition of plants. Three experiments were conducted to assess the effects of AMF inoculation on vegetative growth, essential oil composition, induction of defense-related proteins, and control of Pratylenchus brachyurus in C. citratus. Seedlings were transplanted into pots inoculated with one of two AMF species (Rhizophagus clarus or Claroideoglomus etunicatum). At 30 days after AMF inoculation, plants were inoculated with P. brachyurus. Evaluations were performed at 75 days after nematode inoculation. Although both AMF treatments led to effective root colonization (> 84%), fungus inoculation was not effective in reducing P. brachyurus population density. Nevertheless, C. etunicatum promoted an increase in shoot weight, and AMF treatments contributed to preserving essential oil composition in nematode-infected plants. In addition, both AMF treatments enhanced polyphenol oxidase activity and R. clarus increased peroxidase activity after nematode inoculation.

Cymbopogon citratus (lemongrass) 是一种重要的药用和芳香植物，含有丰富的柠檬醛精油，其质量和数量可能会受到线虫感染的影响。研究表明，丛枝菌根真菌 (AMF) 可作为线虫生物防治剂并改善植物的化学成分。三个实验以评估接种AMF对营养生长，精油组合物，防御相关蛋白的诱导，和控制的影响短体线虫brachyurus中C. citratus。将幼苗移植到接种有两种 AMF 物种之一的盆中（Rhizophagus clarus或Claroideoglomus etunicatum）。在 AMF 接种后 30 天，用P. brachyurus接种植物。在线虫接种后第 75 天进行评估。尽管两种 AMF 处理都导致有效的根部定植 (> 84%)，但真菌接种在降低P. brachyurus种群密度方面无效。尽管如此，C. etunicatum促进了枝条重量的增加，并且 AMF 处理有助于保持线虫感染植物中的精油成分。此外，两种 AMF 处理都增强了多酚氧化酶活性，而R. clarus在线虫接种后增加了过氧化物酶活性。