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首页> 美国卫生研究院文献>Scientific Reports >The interactive effects of arbuscular mycorrhiza and plant growth-promoting rhizobacteria synergistically enhance host plant defences against pathogens
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The interactive effects of arbuscular mycorrhiza and plant growth-promoting rhizobacteria synergistically enhance host plant defences against pathogens

机译：丛枝菌根与植物促生根瘤菌的交互作用协同增强宿主植物对病原体的防御能力

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摘要

Belowground interactions between plant roots, mycorrhizal fungi and plant growth-promoting rhizobacteria (PGPR) can improve plant health via enhanced nutrient acquisition and priming of the plant immune system. Two wheat cultivars differing in their ability to form mycorrhiza were (co)inoculated with the mycorrhizal fungus Rhizophagus irregularis and the rhizobacterial strain Pseudomonas putida KT2440. The cultivar with high mycorrhizal compatibility supported higher levels of rhizobacterial colonization than the low compatibility cultivar. Those levels were augmented by mycorrhizal infection. Conversely, rhizobacterial colonization of the low compatibility cultivar was reduced by mycorrhizal arbuscule formation. Single inoculations with R. irregularis or P. putida had differential growth effects on both cultivars. Furthermore, while both cultivars developed systemic priming of chitosan-induced callose after single inoculations with R. irregularis or P. putida, only the cultivar with high mycorrhizal compatibility showed a synergistic increase in callose responsiveness following co-inoculation with both microbes. Our results show that multilateral interactions between roots, mycorrhizal fungi and PGPR can have synergistic effects on growth and systemic priming of wheat.
机译：植物根，菌根真菌和植物促生根瘤菌（PGPR）之间的地下相互作用可通过增强养分获取和启动植物免疫系统来改善植物健康。将形成菌根能力不同的两个小麦品种分别与菌根真菌不规则根瘤菌和恶臭假单胞菌假单胞菌KT2440接种。具有高菌根相容性的品种比低相容性品种支持更高水平的根际细菌定植。菌根感染会增加这些水平。相反，低菌种的根际细菌定殖通过菌根丛的形成而减少。单次接种不规则R.或恶臭假单胞菌对两个品种都有不同的生长效果。此外，尽管两个品种在单次接种不规则R.或恶臭假单胞菌后均产生了脱乙酰壳多糖诱导的愈伤组织的系统性引发作用，但只有具有高菌根相容性的品种才与两种微生物共同接种后，愈伤组织的响应性协同增加。我们的结果表明，根，菌根真菌和PGPR之间的多边相互作用可以对小麦的生长和系统性引发产生协同作用。

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