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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >CELLULAR INTERACTIONS BETWEEN ARBUSCULAR MYCORRHIZAL FUNGI AND RHIZOSPHERE BACTERIA
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CELLULAR INTERACTIONS BETWEEN ARBUSCULAR MYCORRHIZAL FUNGI AND RHIZOSPHERE BACTERIA

机译：丛枝菌根真菌与根际细菌之间的细胞相互作用

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摘要

We have investigated whether direct physical interactions occur between arbuscular mycorrhizal (AM) fungi and plant growth promoting rhizobacteria (PGPRs), some of which are used as biocontrol agents. Attachment of rhizobia and pseudomonads to the spores and fungal mycelium of Gigaspora margarita has been assessed in vitro and visualized by a combination of electron and confocal microscopy. The results showed that both rhizobia and pseudomonads adhere to spores and hyphae of AM fungi germinated under sterile conditions, although the degree of attachment depended upon the strain. Pseudomonas fluorescens strain WCS 365 and Rhizobium leguminosarum strains B556 and 3841 were the most effective colonizers. Extracellular material of bacterial origin containing cellulose produced around the attached bacteria may mediate fungal/bacterial interactions. These results suggest that antagonistic and synergistic interactions between AM fungi and rhizosphere bacteria may be mediated by soluble factors or physical contact. They also support the view that AM fungi are a vehicle for the colonization of plant roots by soil rhizobacteria. [References: 31]
机译：我们已经调查了丛枝菌根（AM）真菌与植物促生根瘤菌（PGPRs）之间是否发生了直接的物理相互作用，其中一些被用作生物防治剂。已在体外评估了根瘤菌和假单胞菌对玛格氏玛格丽塔孢子和真菌菌丝体的附着，并通过电子和共聚焦显微镜进行了可视化。结果表明，根瘤菌和假单胞菌均附着在无菌条件下萌发的AM真菌的孢子和菌丝，尽管附着程度取决于菌株。荧光假单胞菌WCS 365菌株和豆科根瘤菌菌株B556和3841是最有效的定植菌。细菌来源的细胞外物质包含附着细菌周围产生的纤维素，可能介导真菌/细菌相互作用。这些结果表明AM真菌和根际细菌之间的拮抗和协同相互作用可能是由可溶性因子或物理接触介导的。他们还支持AM真菌是土壤根际细菌在植物根部定植的媒介。 [参考：31]

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