Abstract
Plant growth-promoting rhizobacteria (PGPR) increase plant growth and crop productivity. The inoculation of plants with a bacterial mixture (consortium) apparently provides greater benefits to plant growth than inoculation with a single bacterial strain. In the present work, a bacterial consortium was formulated containing four compatible and desiccation-tolerant strains with potential as PGPR. The formulation had one moderately (Pseudomonas putida KT2440) and three highly desiccation-tolerant (Sphingomonas sp. OF178, Azospirillum brasilense Sp7 and Acinetobacter sp. EMM02) strains. The four bacterial strains were able to adhere to seeds and colonize the rhizosphere of plants when applied in both mono-inoculation and multi-inoculation treatments, showing that they can also coexist without antagonistic effects in association with plants. The effects of the bacterial consortium on the growth of blue maize were evaluated. Seeds inoculated with either individual bacterial strains or the bacterial consortium were subjected to two experimental conditions before sowing: normal hydration or desiccation. In general, inoculation with the bacterial consortium increased the shoot and root dry weight, plant height and plant diameter compared to the non-inoculated control or mono-inoculation treatments. The bacterial consortium formulated in this work had greater benefits for blue maize plants even when the inoculated seeds underwent desiccation stress before germination, making this formulation attractive for future field applications.
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Claims 5
Claim · model-written summary
All four strains adhered to seeds and colonized the rhizosphere under individual and mixed inoculation.
- Treatment
- mono-inoculation and multi-inoculation treatmentse0
- Outcome
- adhere to seeds and colonize the rhizospheree0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The four bacterial strains were able to adhere to seeds and colonize the rhizosphere of plants when applied in both mono-inoculation and multi-inoculation treatments”
t0“maize plant”
Claim · model-written summary
The four strains coexisted without antagonism in association with plants.
- Outcome
- coexist without antagonistic effectse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“they can also coexist without antagonistic effects in association with plants”
t0“maize plant”
Claim · model-written summary
Consortium inoculation increased shoot and root dry weight versus uninoculated or single-strain treatments.
- Treatment
- inoculation with the bacterial consortiume0
- Outcome
- shoot and root dry weighte0
- Direction
- increasede0
- Comparator
- non-inoculated control or mono-inoculation treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inoculation with the bacterial consortium increased the shoot and root dry weight, plant height and plant diameter compared to the non-inoculated control or mono-inoculation treatments”
t0“maize plant”
Claim · model-written summary
Consortium inoculation increased plant height and diameter versus uninoculated or single-strain treatments.
- Treatment
- inoculation with the bacterial consortiume0
- Outcome
- plant height and plant diametere0
- Direction
- increasede0
- Comparator
- non-inoculated control or mono-inoculation treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inoculation with the bacterial consortium increased the shoot and root dry weight, plant height and plant diameter compared to the non-inoculated control or mono-inoculation treatments”
t0“maize plant”
Claim · model-written summary
The consortium benefited blue maize even after inoculated seeds were desiccated before germination.
- Taxon
- blue maizee0
- Treatment
- bacterial consortiume0
- Outcome
- benefits for blue maize plantse0
- Direction
- greatere0
- Qualifier
- desiccation stress before germinatione0
Not reportedComparator
Verbatim
e0“The bacterial consortium formulated in this work had greater benefits for blue maize plants even when the inoculated seeds underwent desiccation stress before germination”
t0“maize plant”
The same questions in other papers
inoculation · growth · Zea mays (maize)Positive and negative results
634 papers in the same direction as this paper · 61 in the opposite direction · 3 reporting no difference from an alternative
- no effect
- negative
- positive
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