Abstract
Introduction Given their remarkable capacity to convert atmospheric nitrogen into plant-accessible ammonia, nitrogen-fixing microbial species hold promise as a sustainable alternative to chemical nitrogen fertilizers, particularly in economically significant crops like wheat. This study aimed to identify strains with optimal attributes for promoting wheat growth sustainably, with a primary emphasis on reducing reliance on chemical nitrogen fertilizers. Methods We isolated free nitrogen-fixing strains from diverse rhizospheric soils across Morocco. Subsequently, we conducted a rigorous screening process to evaluate their plant growth-promoting traits, including nitrogen fixation, phosphate solubilization, phytohormone production and their ability to enhance wheat plant growth under controlled conditions. Two specific strains, Rhodotorula mucilaginosa NF 516 and Arthrobacter sp. NF 528, were selected for in-depth evaluation, with the focus on their ability to reduce the need for chemical nitrogen supply, particularly when used in conjunction with TSP fertilizer and natural rock phosphate. These two sources of phosphate were chosen to assess their agricultural effectiveness on wheat plants. Results and discussion Twenty-two nitrogen-fixing strains ( nif-H +) were isolated from various Moroccan rhizospheric soils, representing Bacillus sp., Pseudomonas sp., Arthrobacter sp., Burkholderia sp. and a yeast-like microorganism. These strains were carefully selected based on their potential to promote plant growth. The findings revealed that the application of Rhodotorula mucilaginosa NF 516 and Arthrobacter sp. NF 528 individually or in combination, significantly improved wheat plant growth and enhanced nutrients (N and P) uptake under reduced nitrogen regimes. Notably, their effectiveness was evident in response to both natural rock phosphate and TSP, demonstrating their important role in wheat production under conditions of low nitrogen and complex phosphorus inputs. This research underscores the significant role of nitrogen-fixing microorganisms, particularly Rhodotorula mucilaginosa NF 516 and Arthrobacter sp. NF 528, in wheat production under conditions of low nitrogen and complex phosphorus inputs. It showcases their potential to reduce chemical nitrogen fertilization requirements by up to 50% without compromising wheat plant yields. Our study emphasizes the importance of bacterial biological nitrogen fixation in meeting the remaining nitrogen requirements beyond this reduction. This underscores the vital role of microbial contributions in providing essential nitrogen for optimal plant growth and highlights the significance of biological nitrogen fixation in sustainable agriculture practices.
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Claims 5
Claim · model-written summary
Twenty-two nitrogen-fixing strains were isolated from Moroccan rhizospheric soils.
Not reportedTaxon
Verbatim
e0“Twenty-two nitrogen-fixing strains ( nif-H +) were isolated from various Moroccan rhizospheric soils”
Claim · model-written summary
Applying Rhodotorula mucilaginosa NF 516 and Arthrobacter sp. NF 528, alone or combined, significantly improved wheat plant growth under reduced nitrogen regimes.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- application of Rhodotorula mucilaginosa NF 516 and Arthrobacter sp. NF 528e0
- Interactor
- Rhodotorula mucilaginosa NF 516
Rhodotorula mucilaginosae0symbiont - Second interactor
- Arthrobacter sp. NF 528e0symbiont
- Outcome
- plant growthe0
- Direction
- improvede0
- Qualifier
- under reduced nitrogen regimese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of Rhodotorula mucilaginosa NF 516 and Arthrobacter sp. NF 528 individually or in combination, significantly improved wheat plant growth and enhanced nutrients (N and P) uptake under reduced nitrogen regimes”
Claim · model-written summary
Applying Rhodotorula mucilaginosa NF 516 and Arthrobacter sp. NF 528, alone or combined, enhanced N and P uptake by wheat under reduced nitrogen regimes.
- Taxon
- wheatTriticum aestivume0
- Treatment
- application of Rhodotorula mucilaginosa NF 516 and Arthrobacter sp. NF 528e0
- Interactor
- Rhodotorula mucilaginosa NF 516Rhodotorula mucilaginosae0symbiont
- Second interactor
- Arthrobacter sp. NF 528e0symbiont
- Outcome
- nutrients (N and P) uptakee0
- Direction
- enhancede0
- Qualifier
- under reduced nitrogen regimese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of Rhodotorula mucilaginosa NF 516 and Arthrobacter sp. NF 528 individually or in combination, significantly improved wheat plant growth and enhanced nutrients (N and P) uptake under reduced nitrogen regimes”
Claim · model-written summary
The effectiveness of the two strains on wheat was evident with both natural rock phosphate and TSP.
- Taxon
- wheatTriticum aestivume0
- Treatment
- natural rock phosphate and TSPe1
- Outcome
- effectivenesse1
- Direction
- evidente1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“their important role in wheat production”
e1“Notably, their effectiveness was evident in response to both natural rock phosphate and TSP”
Claim · model-written summary
The authors state the strains could reduce chemical nitrogen fertilization requirements of wheat by up to 50% without compromising yields.
- Taxon
- wheatTriticum aestivume0
- Outcome
- reduce chemical nitrogen fertilization requirementse0
- Value
- up to 50%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It showcases their potential to reduce chemical nitrogen fertilization requirements by up to 50% without compromising wheat plant yields”
The same questions in other papers
Rhodotorula mucilaginosa · growth · Triticum aestivum (wheat)Results agree
1 paper in the same direction as this paper
- positive
Arthrobacter · growth · Triticum aestivum (wheat)Results agree
1 paper in the same direction as this paper
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.