Abstract
BACKGROUND: Plant-growth-promoting rhizobacteria (PGPR) and arbuscular mycorrhizal (AM) fungi have the ability to enhance the growth, fitness, and quality of various agricultural crops, including cowpea. However, field trials confirming the benefits of microbes in large-scale applications using economically viable and efficient inoculation methods are still scarce. Microbial seed coating has a great potential for large-scale agriculture through the application of reduced amounts of PGPR and AM fungi inocula. Thus, in this study, the impact of seed coating with PGPR, Pseudomonas libanensis TR1 and AM fungus, Rhizophagus irregularis (single or multiple isolates) on grain yield and nutrient content of cowpea under low-input field conditions was evaluated. RESULTS: Seed coating with P. libanensis + multiple isolates of R. irregularis (coatPMR) resulted in significant increases in shoot dry weight (76%), and in the number of pods and seeds per plant (52% and 56%, respectively) and grain yield (56%), when compared with non-inoculated control plants. However, seed coating with P. libanensis + R. irregularis single-isolate (coatPR) did not influence cowpea grain yield. Grain lipid content was significantly higher (25%) in coatPMR plants in comparison with control. Higher soil organic matter and lower pH were observed in the coatPMR treatment. CONCLUSIONS: Our findings indicate that cowpea field productivity can be improved by seed coating with PGPR and multiple AM fungal isolates under low-input agricultural systems. © 2019 Society of Chemical Industry.
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Claims 8
Claim · model-written summary
Coating with P. libanensis plus multiple R. irregularis isolates increased cowpea shoot dry weight by 76% against uninoculated controls.
- Taxon
- cowpea
Vigna unguiculatat0 - Treatment
- Seed coating with P. libanensis + multiple isolates of R. irregularis (coatPMR)e0
- Interactor
- P. libanensisPseudomonas libanensise0symbiont
- Second interactor
- R. irregularis
Rhizophagus irregularise0symbiont - Outcome
- shoot dry weighte0
- Direction
- increasese0
- Value
- 76%e0
- Comparator
- non-inoculated control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed coating with P. libanensis + multiple isolates of R. irregularis (coatPMR) resulted in significant increases in shoot dry weight (76%), and in the number of pods and seeds per plant (52% and 56%, respectively) and grain yield (56%), when compared with non-inoculated control plants”
t0“cowpea productivity”
Claim · model-written summary
The multiple-isolate coating increased cowpea pod number per plant by 52%.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- Seed coating with P. libanensis + multiple isolates of R. irregularis (coatPMR)e0
- Interactor
- P. libanensisPseudomonas libanensise0symbiont
- Second interactor
- R. irregularisRhizophagus irregularise0symbiont
- Outcome
- number of podse0
- Direction
- increasese0
- Value
- 52%e0
- Comparator
- non-inoculated control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed coating with P. libanensis + multiple isolates of R. irregularis (coatPMR) resulted in significant increases in shoot dry weight (76%), and in the number of pods and seeds per plant (52% and 56%, respectively) and grain yield (56%), when compared with non-inoculated control plants”
t0“cowpea productivity”
Claim · model-written summary
The multiple-isolate coating increased cowpea seed number per plant by 56%.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- Seed coating with P. libanensis + multiple isolates of R. irregularis (coatPMR)e0
- Interactor
- P. libanensisPseudomonas libanensise0symbiont
- Second interactor
- R. irregularisRhizophagus irregularise0symbiont
- Outcome
- seeds per plante0
- Direction
- increasese0
- Value
- 56%e0
- Comparator
- non-inoculated control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed coating with P. libanensis + multiple isolates of R. irregularis (coatPMR) resulted in significant increases in shoot dry weight (76%), and in the number of pods and seeds per plant (52% and 56%, respectively) and grain yield (56%), when compared with non-inoculated control plants”
t0“cowpea productivity”
Claim · model-written summary
The multiple-isolate coating increased cowpea grain yield by 56%.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- Seed coating with P. libanensis + multiple isolates of R. irregularis (coatPMR)e0
- Interactor
- P. libanensisPseudomonas libanensise0symbiont
- Second interactor
- R. irregularisRhizophagus irregularise0symbiont
- Outcome
- grain yielde0
- Direction
- increasese0
- Value
- 56%e0
- Comparator
- non-inoculated control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed coating with P. libanensis + multiple isolates of R. irregularis (coatPMR) resulted in significant increases in shoot dry weight (76%), and in the number of pods and seeds per plant (52% and 56%, respectively) and grain yield (56%), when compared with non-inoculated control plants”
t0“cowpea productivity”
Claim · model-written summary
Coating with P. libanensis plus a single R. irregularis isolate did not influence cowpea grain yield.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- seed coating with P. libanensis + R. irregularis single-isolate (coatPR)e0
- Interactor
- P. libanensisPseudomonas libanensise0symbiont
- Second interactor
- R. irregularisRhizophagus irregularise0symbiont
- Outcome
- cowpea grain yielde0
- Direction
- did not influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed coating with P. libanensis + R. irregularis single-isolate (coatPR) did not influence cowpea grain yield”
Claim · model-written summary
The multiple-isolate coating raised cowpea grain lipid content by 25% compared with controls.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- coatPMRe0
- Outcome
- Grain lipid contente0
- Direction
- highere0
- Value
- 25%e0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain lipid content was significantly higher (25%) in coatPMR plants in comparison with control”
t0“cowpea productivity”
Claim · model-written summary
Soil organic matter was higher under the multiple-isolate cowpea coating.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- coatPMR treatmente0
- Outcome
- soil organic mattere0
- Direction
- Highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher soil organic matter and lower pH were observed in the coatPMR treatment”
t0“cowpea productivity”
Claim · model-written summary
Soil pH was lower under the multiple-isolate cowpea coating.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- coatPMR treatmente0
- Outcome
- pHe0
- Direction
- lowere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher soil organic matter and lower pH were observed in the coatPMR treatment”
t0“cowpea productivity”
The same questions in other papers
Pseudomonas libanensis · yield · Vigna unguiculata (cowpea)Results agree
1 paper in the same direction as this paper
- positive
Rhizophagus irregularis · yield · Vigna unguiculata (cowpea)Results agree
1 paper in the same direction as this paper
- positive
seed treatment · yield · Vigna unguiculata (cowpea)Results differ
26 papers in the same direction as this paper · 1 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- positive
25 papers more in this group
See all 29 papers →seed treatment · growth · Vigna unguiculata (cowpea)Positive and negative results
30 papers in the same direction as this paper · 3 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- negative
31 papers more in this group
See all 35 papers →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.