Abstract
Application of phosphate-solubilizing bacteria (PSB) has been shown to promote plant growth and development in the field and under controlled environmental conditions. The effects of PSB on microbial activity and soil quality are not well known. This study aims to determine the effect of inoculation with three PSB strains on the solubilization of rock phosphate (RP) in soil and growth promotion, nutrient uptake, photosynthetic capacity, and soil enzyme activities of 1-year-old walnut seedlings by using potted experiments with a completely randomized design under single or mixed inoculations. Inoculation with Pseudomonas aurantiaca or P. fluorescens significantly improved the plant height, shoot and root dry weight, phosphorus (P) and nitrogen (N) uptake, and net photosynthetic rate of walnut seedlings. Application of these two PSB strains also improved soil quality, as indicated by increased activities of dehydrogenase, neutral phosphatase, and urease in the soil. These increases were higher when PSB was applied together with RP. The most pronounced beneficial effects on plant growth and soil enzyme activities were observed when the three PSB strains were co-inoculated with RP. Bacillus cereus failed to promote plant growth. The results demonstrated that P. aurantiaca or P. fluorescens could be used as an environment-safe biofertilizer of walnut seedlings and other woody plants.
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Claims 9
Claim · model-written summary
Pseudomonas aurantiaca inoculation improved walnut seedling height and shoot and root dry weight.
- Taxon
- walnut seedlingse0
- Treatment
- Inoculation with Pseudomonas aurantiacae0
- Interactor
- Pseudomonas aurantiacaPseudomonas chlororaphis subsp. aurantiacae0symbiont
- Outcome
- plant height, shoot and root dry weighte0
- Direction
- improvede0
Not reportedComparator
Verbatim
e0“Inoculation with Pseudomonas aurantiaca or P. fluorescens significantly improved the plant height, shoot and root dry weight, phosphorus (P) and nitrogen (N) uptake, and net photosynthetic rate of walnut seedlings.”
Claim · model-written summary
P. fluorescens inoculation improved walnut seedling height and shoot and root dry weight.
- Taxon
- walnut seedlingse0
- Treatment
- P. fluorescense0
- Interactor
- P. fluorescens
.JPG?width=60)
Pseudomonas fluorescense0symbiont - Outcome
- plant height, shoot and root dry weighte0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.JPG?width=500)
Verbatim
e0“Inoculation with Pseudomonas aurantiaca or P. fluorescens significantly improved the plant height, shoot and root dry weight, phosphorus (P) and nitrogen (N) uptake, and net photosynthetic rate of walnut seedlings.”
Claim · model-written summary
Pseudomonas aurantiaca inoculation increased phosphorus and nitrogen uptake and photosynthetic rate.
- Taxon
- walnut seedlingse0
- Treatment
- Inoculation with Pseudomonas aurantiacae0
- Interactor
- Pseudomonas aurantiacaPseudomonas chlororaphis subsp. aurantiacae0symbiont
- Outcome
- phosphorus (P) and nitrogen (N) uptake, and net photosynthetic ratee0
- Direction
- improvede0
Not reportedComparator
Verbatim
e0“Inoculation with Pseudomonas aurantiaca or P. fluorescens significantly improved the plant height, shoot and root dry weight, phosphorus (P) and nitrogen (N) uptake, and net photosynthetic rate of walnut seedlings.”
Claim · model-written summary
P. fluorescens inoculation increased phosphorus and nitrogen uptake and photosynthetic rate.
- Taxon
- walnut seedlingse0
- Treatment
- P. fluorescense0
- Interactor
- P. fluorescensPseudomonas fluorescense0symbiont
- Outcome
- phosphorus (P) and nitrogen (N) uptake, and net photosynthetic ratee0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation with Pseudomonas aurantiaca or P. fluorescens significantly improved the plant height, shoot and root dry weight, phosphorus (P) and nitrogen (N) uptake, and net photosynthetic rate of walnut seedlings.”
Claim · model-written summary
Application of the two PSB strains increased dehydrogenase, neutral phosphatase and urease activities in soil.
- Taxon
- Walnutt0
- Treatment
- these two PSB strainse0
- Outcome
- activities of dehydrogenase, neutral phosphatase, and urease in the soile0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Application of these two PSB strains also improved soil quality, as indicated by increased activities of dehydrogenase, neutral phosphatase, and urease in the soil.”
t0“Walnut”
Claim · model-written summary
PSB together with rock phosphate produced higher increases.
- Taxon
- Walnutt0
- Treatment
- PSB was applied together with RPe0
- Interactor
- PSBe0symbiont
- Outcome
- These increasese0
- Direction
- highere0
Not reportedComparator
Verbatim
e0“These increases were higher when PSB was applied together with RP.”
t0“Walnut”
Claim · model-written summary
Co-inoculation of the three PSB strains with rock phosphate produced the greatest plant growth and soil enzyme benefits.
- Taxon
- Walnutt0
- Treatment
- the three PSB strains were co-inoculated with RPe0
- Interactor
- PSBe0symbiont
- Outcome
- plant growth and soil enzyme activitiese0
- Direction
- most pronouncede0
Not reportedComparator
Verbatim
e0“The most pronounced beneficial effects on plant growth and soil enzyme activities were observed when the three PSB strains were co-inoculated with RP.”
t0“Walnut”
Claim · model-written summary
Bacillus cereus did not promote plant growth.
- Taxon
- Walnutt0
- Treatment
- Bacillus cereuse0
- Interactor
- Bacillus cereus
Bacillus cereuse0symbiont - Outcome
- plant growthe0
- Direction
- failed to promotee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bacillus cereus failed to promote plant growth.”
t0“Walnut”
Claim · model-written summary
P. aurantiaca or P. fluorescens may serve as a biofertilizer for walnut seedlings.
- Taxon
- walnut seedlingse0
- Interactor
- P. aurantiacaPseudomonas chlororaphis subsp. aurantiacae0symbiont
- Outcome
- environment-safe biofertilizere0
Verbatim
e0“P. aurantiaca or P. fluorescens could be used as an environment-safe biofertilizer of walnut seedlings and other woody plants.”
The same questions in other papers
Bacillus cereus · growth · Juglans (walnuts)Positive and negative results
1 in the opposite direction
- positive
inoculation · soil: biology · Juglans (walnuts)Results agree
1 paper in the same direction as this paper
- positive
inoculation · physiology: photosynthesis · Juglans (walnuts)Results agree
1 paper in the same direction as this paper
- positive
inoculation · growth · Juglans (walnuts)Results agree
5 papers in the same direction as this paper
- positive
- positive
- positive
2 papers more in this group
See all 6 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.