Applied Chemical Ecology Technology, Department of Entomology, Cornell AgriTech, New York, USA.
Entomology and Nemotalogy Department, University of Florida, Florida, USA.
Sci Rep. 2020 Feb 10;10(1):2212. doi: 10.1038/s41598-020-59062-8.
Plant-parasitic nematodes are devastating pathogens of many important agricultural crops. They have been successful in large part due to their ability to modify host plant metabolomes to their benefit. Both root-knot and cyst nematodes are endoparasites that have co-evolved to modify host plants to create sophisticated feeding cells and suppress plant defenses. In contrast, the ability of migratory ectoparasitic nematodes to modify host plants is unknown. Based on global metabolomic profiling of sting nematodes in African bermudagrass, ectoparasites can modify the global metabolome of host plants. Specifically, sting nematodes suppress amino acids in susceptible cultivars. Upregulation of compounds linked to plant defense have negative impacts on sting nematode population densities. Pipecolic acid, linked to systemic acquired resistance induction, seems to play a large role in protecting tolerant cultivars from sting nematode feeding and could be targeted in breeding programs.
植物寄生线虫是许多重要农作物的毁灭性病原体。它们之所以能够成功，在很大程度上是因为它们能够改变宿主植物的代谢组，使自身受益。根结线虫和孢囊线虫都是内寄生线虫，它们共同进化以改变宿主植物，形成复杂的取食细胞并抑制植物防御。相比之下，迁移性外寄生线虫改变宿主植物的能力尚不清楚。基于对非洲百慕大狗尾草刺线虫的全球代谢组学分析，外寄生线虫可以改变宿主植物的全局代谢组。具体来说，刺线虫会抑制感病品种中的氨基酸。与植物防御相关的化合物的上调对刺线虫种群密度有负面影响。与系统获得性抗性诱导相关的哌啶酸似乎在保护耐受品种免受刺线虫取食方面发挥了重要作用，并且可以作为育种计划的目标。
