Impaired microbial N-acyl homoserine lactone signalling increases plant resistance to aphids across variable abiotic and biotic environments.
Impaired microbial N-acyl homoserine lactone signalling increases plant resistance to aphids across variable abiotic and biotic environments.
复制标题
微生物 N-酰基高丝氨酸内酯信号传导受损会增加植物在不同的非生物和生物环境中对蚜虫的抵抗力。
DOI：
10.1111/pce.14399
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Sanchez-Mahecha O
中科院分区：
文献类型：
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作者：
Sanchez-Mahecha O
有益的细菌使用信号分子与植物相互作用，如ASN-酰基高丝氨酸内酯(AHLS)。虽然有证据表明这些分子影响植物对病原体的反应，但很少有研究考察它们对植物-昆虫和微生物群相互作用的影响，特别是在可变的土壤条件下。我们研究了根际细菌AHL产生菌及其AHL阴性突变体(不产生AHL)对大麦与麦长管蚜(Sitobion Venae)和蚯蚓(Dendrobaena Veneta)在不同土壤中相互作用的调节作用。然而，不同的大麦品种和蚯蚓的存在改变了相互作用的结果。细菌诱导的植物防御在不同的品种和不同的蚜虫暴露下是不同的，与致病相关的途径和WRKY途径部分解释了更多抗性品种的生态效应。此外，我们通过更广泛的根微生物群观察到很少但特定的间接影响，其中AHL突变菌株影响罕见的OTU丰度。我们的结论是，细菌AHL信号的中断通过诱导不同的植物途径影响植物与微生物的相互作用，导致昆虫抗性的增加，这也是由周围的生物和非生物环境介导的。了解有益细菌减少害虫的机制是制定可持续农业中有效的害虫管理策略的关键研究领域。
Beneficial bacteria interact with plants using signalling molecules, such asN‐acyl homoserine‐lactones (AHLs). Although there is evidence that these molecules affect plant responses to pathogens, few studies have examined their effect on plant‐insect and microbiome interactions, especially under variable soil conditions. We investigated the effect of the AHL‐producing rhizobacteriumAcidovorax radicisand its AHL‐negative mutant (does not produce AHLs) on modulating barley (Hordeum vulgare) plant interactions with cereal aphids (Sitobion avenae) and earthworms (Dendrobaena veneta) across variable nutrient soils.Acidovorax radicisinoculation increased plant growth and suppressed aphids, with stronger effects by the AHL‐negative mutant. However, effects varied between barley cultivars and the presence of earthworms altered interaction outcomes. Bacteria‐induced plant defences differed between cultivars, and aphid exposure, with pathogenesis‐related andWRKYpathways partly explaining the ecological effects in the more resistant cultivars. Additionally, we observed few but specific indirect effects via the wider root microbiome where the AHL‐mutant strain influenced rare OTU abundances. We conclude that bacterial AHL‐signalling disruption affects plant‐microbial interactions by inducing different plant pathways, leading to increased insect resistance, also mediated by the surrounding biotic and abiotic environment. Understanding the mechanisms by which beneficial bacteria can reduce insect pests is a key research area for developing effective insect pest management strategies in sustainable agriculture.