Graduate School of Agriculture, Hokkaido University, 060-8589 Sapporo, Japan.
Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Hokkaido Center, 062-8517 Sapporo, Japan.
Biol Lett. 2021 Mar;17(3):20200780. doi: 10.1098/rsbl.2020.0780. Epub 2021 Mar 3.
Resistance to toxins in insects is generally thought of as their own genetic trait, but recent studies have revealed that gut microorganisms could mediate resistance by detoxifying phytotoxins and man-made insecticides. By laboratory experiments, we here discovered a striking example of gut symbiont-mediated insecticide resistance in a serious rice pest, . The rice bug horizontally acquired fenitrothion-degrading through oral infection and housed it in midgut crypts. Fenitrothion-degradation test revealed that the gut-colonizing retains a high degrading activity of the organophosphate compound in the insect gut. This gut symbiosis remarkably increased resistance against fenitrothion treatment in the host rice bug. Considering that many stinkbug pests are associated with soil-derived , our finding strongly supports that a number of stinkbug species could gain resistance against insecticide simply by acquiring insecticide-degrading gut bacteria.
昆虫对毒素的抗性通常被认为是其自身的遗传特性，但最近的研究表明，肠道微生物可以通过解毒植物毒素和人造杀虫剂来介导抗性。通过实验室实验，我们在这里发现了一个在严重的水稻害虫褐飞虱中肠道共生体介导的杀虫剂抗性的惊人例子。褐飞虱通过口服感染水平获得了对硫磷降解菌，并将其安置在中肠隐窝中。对硫磷降解试验表明，定殖在肠道中的共生菌保留了有机磷化合物在昆虫肠道中的高降解活性。这种肠道共生关系显著提高了褐飞虱对硫磷处理的抗性。考虑到许多蝽象害虫与土壤衍生的共生菌有关，我们的发现强烈支持许多蝽象物种可以通过简单地获得能够降解杀虫剂的肠道细菌来获得对杀虫剂的抗性。
