What does this research mean for the field?

The effectiveness of single versus multi-strain plant growth-promoting bacteria in tomatoes is strongly dependent on phosphorus availability, demonstrating that multi-strain consortia do not consistently outperform single strains and can be counterproductive if not designed for functional complementarity. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To evaluate how single plant growth-promoting bacterial strains and a defined multi-strain consortium influence tomato phosphorus nutrition and early growth across varying phosphorus levels and forms.

August 27, 2026PlantaOpen Access

More is not always better: phosphorus context shapes the effectiveness of single-strain and consortium plant growth-promoting bacteria in tomato

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Authors

AAAlice Ferreira Alves MZMônica Yorlady Alzate Zuluaga TCTalita de Oliveira Caretta

Discussion

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Overview

Factorial experiment demonstrates distinct phosphorus regimes dictate single-strain versus consortium inoculant efficacy in tomato, indicating functional matching matters more than microbial...

Key Points

To evaluate how single plant growth-promoting bacterial strains and a defined multi-strain consortium influence tomato phosphorus nutrition and early growth across varying phosphorus levels and forms.
Tomato plants were grown hydroponically in a factorial design with non-inoculated controls, three single-strain inoculations (Azospirillum brasilense, Pantoea agglomerans, Priestia aryabhattai), and a defined consortium.
Plants were tested across five phosphorus regimes varying by concentration and chemical form (soluble versus insoluble).
Assessed plant growth, root architecture traits, ionomics profiles, and targeted expression of SlPHT1 phosphate transporters.
Pantoea agglomerans provided the most consistent growth benefits under soluble phosphorus, while Azospirillum brasilense enhanced adaptive root traits and transporter responses under moderate limitation.
Priestia aryabhattai reshaped nutrient associations, primarily under insoluble phosphorus conditions.
The multi-strain consortium did not consistently outperform single strains, demonstrating clear advantages only when insoluble phosphorus was the sole nutrient source.

Cite This Study

Alves et al. (2026) studied this question.

synapsesocial.com/papers/6a8fe99e10c91c1e9262161e https://doi.org/10.1007/s00425-026-05134-4

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August 27, 2026PlantaOpen Access

More is not always better: phosphorus context shapes the effectiveness of single-strain and consortium plant growth-promoting bacteria in tomato

View Full Paper

Ask AI

Bookmark

Authors

AAAlice Ferreira Alves MZMônica Yorlady Alzate Zuluaga TCTalita de Oliveira Caretta

Discussion

Member takes

Overview

Factorial experiment demonstrates distinct phosphorus regimes dictate single-strain versus consortium inoculant efficacy in tomato, indicating functional matching matters more than microbial...

Key Points

To evaluate how single plant growth-promoting bacterial strains and a defined multi-strain consortium influence tomato phosphorus nutrition and early growth across varying phosphorus levels and forms.
Tomato plants were grown hydroponically in a factorial design with non-inoculated controls, three single-strain inoculations (Azospirillum brasilense, Pantoea agglomerans, Priestia aryabhattai), and a defined consortium.
Plants were tested across five phosphorus regimes varying by concentration and chemical form (soluble versus insoluble).
Assessed plant growth, root architecture traits, ionomics profiles, and targeted expression of SlPHT1 phosphate transporters.
Pantoea agglomerans provided the most consistent growth benefits under soluble phosphorus, while Azospirillum brasilense enhanced adaptive root traits and transporter responses under moderate limitation.
Priestia aryabhattai reshaped nutrient associations, primarily under insoluble phosphorus conditions.
The multi-strain consortium did not consistently outperform single strains, demonstrating clear advantages only when insoluble phosphorus was the sole nutrient source.

Cite This Study

Alves et al. (2026) studied this question.

synapsesocial.com/papers/6a8fe99e10c91c1e9262161e https://doi.org/10.1007/s00425-026-05134-4

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