PGPR-Soil Microbial Communities’ Interactions and Their Influence on Wheat Growth Promotion and Resistance Induction against Mycosphaerella graminicola

Samain, Erika; Duclercq, Jérôme; Ait Barka, Essaïd; Eickermann, Michael; Ernenwein, Cédric; Mazoyon, Candice; Sarazin, Vivien; Dubois, Frédéric; Aussenac, Thierry; Selim, Sameh

doi:10.3390/biology12111416

Cited by 6 publications

(2 citation statements)

References 59 publications

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“…Notably, these genera exhibited the highest values of relative abundance in the two most abundant phyla (Proteobacteria and Actinobacteria) across all the treatments. These bacteria are often recognised as PGPR or, as in the case of Blastococcus, playing an essential role in sustaining and boosting soil resilience and soil health [59][60][61]. Other genera consistently present but in lesser abundance were Flavobacterium, Agromyces, Streptomyces, Bradyrhizobium, Bacillus, and Pseudomonas.…”

Section: Discussionmentioning

confidence: 99%

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Fertilising Maize with Bio-Based Mineral Fertilisers Gives Similar Growth to Conventional Fertilisers and Does Not Alter Soil Microbiome

Barquero,

Cazador,

Ortiz-Liébana

et al. 2024

Agronomy

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The production of mineral fertilisers relies heavily on mineral deposits that are becoming depleted or is based on processes that are highly energy demanding. In this context, and in line with the circular economy and the European Green Deal, the recovery of nitrogen (N), phosphorus (P), and potassium (K) from organic wastes using chemical technologies is an important strategy to produce secondary raw materials for incorporation into mineral fertilisers, partially replacing the traditional sources of N, P, and K. However, there are very few studies on the agronomic and environmental effects of such substitution. The aim of this work was to evaluate plant growth under microcosm conditions and the effect on the soil microbiome of mineral fertilisers in which part of the N, P, or K content comes from bio-based materials (BBMFs), namely ash, struvite, and a patented chemical process. The crop was maize, and a metataxonomic approach was used to assess the effect on the soil microbiome. The BBMF treatments were compared with a control treated with a conventional mineral fertiliser. The conventional fertiliser performed significantly better than the bio-based fertilisers in terms of maize biomass production at the first sampling point 60 days after sowing (DAS), but at the last sampling point, 90 DAS, the BBMFs showed comparable or even better biomass production than the conventional one. This suggests that BBMFs may have a slightly slower nutrient release rate. The use of fertiliser, whether conventional or BBMF, resulted in a significant increase in microbiome biodiversity (Shannon index), while it did not affect species richness. Interestingly, the use of fertilisers modulated the composition of the bacterial community, increasing the abundance of beneficial bacterial taxa considered to be plant-growth-promoting bacteria, without significant differences between the conventional mineral fertilisers and the BBMFs. The predominance of PGPRs in the rhizosphere of crops when BBMFs are used could be part of the reason why BBMFs perform similarly or even better than conventional fertilisers, even if the rate of nutrient release is slower. This hypothesis will be tested in future field trials. Thus, BBMFs are an interesting option to make the food chain more sustainable.

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Section: Discussionmentioning

confidence: 99%

“…Other genera consistently present but in lesser abundance were Flavobacterium, Agromyces, Streptomyces, Bradyrhizobium, Bacillus, and Pseudomonas. This constitutes a beneficial community because all these genera contain beneficial microorganisms [51,59,62].…”

Section: Discussionmentioning

confidence: 99%