Plant–Microorganism Interactions in the Rhizosphere

Lemanceau, Philippe; Barret, Matthieu; Blouin, Manuel; Mazurier, Sylvie; Pivato, Barbara

doi:10.1002/9781119438274.ch4

Cited by 1 publication

(1 citation statement)

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“…Plants might have adapted mechanisms to benefit from microbial siderophores rather than be challenged, which would make this iron uptake pathway an important feature in the functioning of the plant holobiont (a supra‐organism made of the plant and its microbiota: Vandenkoornhuyse et al, 2015; Lyu et al, 2021). The long‐standing co‐evolution of plants and rhizosphere bacteria (encompassing pseudomonads) has led to reciprocal beneficial interactions (Lemanceau et al, 2017; Lemanceau et al, 2018). Additional research should shed light on the fate and impact of this form of iron supply in relation to pH and Eh (redox potential) in different compartments of the same plant, which can vary (Grillet et al, 2014; Krohling et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Iron status and root cell morphology of Arabidopsis thaliana as modified by a bacterial ferri‐siderophore

Avoscan,

Lurthy,

Lherminier

et al. 2024

Physiologia Plantarum

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We previously provided evidence for the contribution of pyoverdine to the iron nutrition of Arabidopsis. In the present article, we further analyze the mechanisms and physiology of the adaptations underlying plant iron nutrition through Fe(III)‐pyoverdine (Fe(III)‐pvd). An integrated approach combining microscopy and nanoscale secondary ion mass spectrometry (NanoSIMS) on plant samples was adopted to localize pyoverdine in planta and assess the impact of this siderophore on the plant iron status and root cellular morphology. The results support a possible plant uptake mechanism of the Fe(III)‐pvd complex by epidermal root cells via a non‐reductive process associated with the presence of more vesicles. Pyoverdine was transported to the central cylinder via the symplastic and/or trans‐cellular pathway(s), suggesting a possible root‐to‐shoot translocation. All these processes led to enhanced plant iron nutrition, as previously shown. Overall, these findings suggest that bacterial siderophores contribute to plant iron uptake and homeostasis.

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