Microbe-induced plant resistance against insect pests depends on timing of inoculation but is consistent across climatic conditions
Microbe-induced plant resistance against insect pests depends on timing of inoculation but is consistent across climatic conditions
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微生物诱导的植物对害虫的抵抗力取决于接种时间，但在不同气候条件下是一致的
DOI：
10.1111/1365-2435.14529
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发表时间：
2024
影响因子：
5.2
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
为了应对非生物和生物胁迫，植物与有益的土壤微生物建立了互惠关系，但人们对极端非生物条件如何影响微生物诱导对昆虫草食动物的抵抗力知之甚少。极端温度通常伴随着植物可用水的极端情况，这共同减少了植物的生长并改变了植物的生理机能。植物对生物胁迫的敏感性增加可能会产生潜在后果，这对植物生产力构成了真正的挑战。我们评估了植物水分可用性梯度上的单一热浪事件如何影响有益土壤细菌（Acidovorax radicisN35e）对大麦植物生长的影响以及由此产生的对蚜虫侵染（Sitobion avenae）的抵抗力。我们还测试了细菌接种时间（温度处理之前或之后）是否影响蚜虫上的细菌与植物的相互作用。我们发现热浪影响了植物生物量从地上组织到地下组织的分配。接种A.根导致蚜虫数量减少，但取决于接种时间，并且当接种发生在接近蚜虫侵染时会产生更强的抗性。值得注意的是，微生物诱导的对蚜虫的抵抗力在热浪和水可用处理中是一致的。这项研究提供的证据表明，有益的植物-细菌相互作用可能代表可持续农业实践的潜在解决方案，以增强植物生长和应对气候变化下的害虫。未来的现场试验应该调查此处报告的有益效果的一致性，以便更好地了解全球变化背景下的多物种相互作用。在期刊博客上阅读本文的免费简单语言摘要。
To cope with abiotic and biotic stressors, plants have developed mutualistic associations with beneficial soil microbes, but little is known about how extreme abiotic conditions impact on microbe‐induce resistance to insect herbivores.Extreme temperatures are often accompanied by extremes in plant water availability, which together reduce plant growth and change plant physiology. There are potential consequences for increasing plant susceptibility to biotic stresses, and this poses a real challenge for plant productivity.We evaluated how the effects of beneficial soil bacteria (Acidovorax radicisN35e) on barley plant growth and resultant resistance against aphid infestation (Sitobion avenae) were impacted by a single heatwave event across a plant water availability gradient. We also tested if timing of bacterial inoculation (before or after the temperature treatment) affected bacteria‐plant interactions on aphids.We found that heatwaves affected plant biomass allocation from above‐ground to below‐ground tissues. Inoculation withA. radicisled to reduction of aphid numbers, but depended on timing of inoculation, and led to stronger resistance when inoculations occurred closer to aphid infestation. Remarkably, microbe‐induced resistance against aphids was consistent across heatwave and water availability treatments.This study provides evidence that beneficial plant‐bacteria interactions may represent a potential solution for sustainable agricultural practices to enhance plant growth and response to insect pests under climate change. Future field trials should investigate the consistency of beneficial effects reported here for a better understanding of multispecies interactions in the context of global change.Read the free Plain Language Summary for this article on the Journal blog.