Abstract
Four sulfur-oxidising bacteria were selected among 427 bacterial isolates from calcareous sandy soils in the United Arab Emirates (UAE). These isolates were selected based on their strong ability to oxidise elemental sulfur (S°) in vitro and were identified as Paracoccus versutus CBS 114155, Paracoccus pantotrophus CBS 114154, and 2 strains as Rhizobium spp. NCCB 100053 and NCCB 100054. This is the first published report of a Rhizobium species capable of S° oxidation and also the first record of sulfur-oxidising bacteria from UAE soils. These isolates were tested in a greenhouse in the presence and absence of S° to study their effects on maize growth. Best growth was observed in the treatment with P. versutus application combined with S°, which significantly reduced soil pH, increased soil SO4 level and the uptake of N, S, Fe, Mn, and Zn in maize roots and shoots. The P and Cu uptake in the shoots of maize plants was not significant compared with the treatment that received the application of S° alone. There was no response in plant growth to treatments that included the application of S° combined with P. pantotrophus or Rhizobium strain NCCB 100053 compared with the treatment that received the application of S° alone. There was significant growth inhibition of maize plants in the treatment receiving Rhizobium strain NCCB 100054 with or without the application of S° compared with the treatment that included the application of S° alone. This growth inhibition was associated with a significant decrease in the levels of N, P, S, Fe, Mn, Zn, and Cu in roots and shoots in the absence of S°. Rhizobium strain NCCB 100054 applied with S° significantly decreased the levels of N, S, and Fe in the roots and the levels of N, P, S, Fe, Mn, and Cu in the shoots of maize, with no significant differences in the levels of P and Mn in the roots and in the levels of Zn in the shoots, compared with the treatment with S° alone. These results indicate that the treatment P. versutus combined with S° can be effective as a soil conditioner for horticultural production in calcareous sandy soils.
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Claims 13
Claim · model-written summary
Paracoccus versutus with elemental sulfur gave the best maize growth.
- Treatment
- P. versutus application combined with S°e0
- Interactor
- P. versutusParacoccus versutuse0symbiont
- Outcome
- growthe0
- Direction
- Beste0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Best growth was observed in the treatment with P. versutus application combined with S°”
t0“maize”
Claim · model-written summary
Paracoccus versutus with sulfur significantly lowered soil pH.
- Treatment
- P. versutus application combined with S°e0
- Interactor
- P. versutusParacoccus versutuse0symbiont
- Outcome
- soil pHe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. versutus application combined with S°, which significantly reduced soil pH”
t0“maize”
Claim · model-written summary
Paracoccus versutus with sulfur increased soil sulfate.
- Treatment
- P. versutus application combined with S°e0
- Interactor
- P. versutusParacoccus versutuse0symbiont
- Outcome
- soil SO4 levele0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. versutus application combined with S°, which significantly reduced soil pH, increased soil SO4 level”
t0“maize”
Claim · model-written summary
Paracoccus versutus with sulfur increased uptake of N, S, Fe, Mn and Zn in maize roots and shoots.
- Organ / stage
- roots and shootse0
- Treatment
- P. versutus application combined with S°e0
- Interactor
- P. versutusParacoccus versutuse0symbiont
- Outcome
- uptake of N, S, Fe, Mn, and Zne0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. versutus application combined with S°, which significantly reduced soil pH, increased soil SO4 level and the uptake of N, S, Fe, Mn, and Zn in maize roots and shoots”
t0“maize”
Claim · model-written summary
Shoot P and Cu uptake did not differ significantly from sulfur alone.
- Organ / stage
- shootse0
- Treatment
- P. versutus application combined with S°e0
- Outcome
- P and Cu uptakee0
- Comparator
- application of S° alonee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. versutus application combined with S°, which significantly reduced soil pH, increased soil SO4 level and the uptake of N, S, Fe, Mn, and Zn in maize roots and shoots. The P and Cu uptake in the shoots of maize plants was not significant compared with the treatment that received the application of S° alone”
t0“maize”
Claim · model-written summary
Sulfur with Paracoccus pantotrophus caused no maize growth response relative to sulfur alone.
- Treatment
- application of S° combined with P. pantotrophuse0
- Interactor
- P. pantotrophusParacoccus pantotrophuse0symbiont
- Outcome
- plant growthe0
- Direction
- no responsee0
- Comparator
- application of S° alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no response in plant growth to treatments that included the application of S° combined with P. pantotrophus or Rhizobium strain NCCB 100053 compared with the treatment that received the application of S° alone”
t0“maize”
Claim · model-written summary
Sulfur with Rhizobium NCCB 100053 caused no maize growth response relative to sulfur alone.
- Treatment
- Rhizobium strain NCCB 100053e0
- Interactor
- Rhizobium strain NCCB 100053e0symbiont
- Outcome
- plant growthe0
- Direction
- no responsee0
- Comparator
- application of S° alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no response in plant growth to treatments that included the application of S° combined with P. pantotrophus or Rhizobium strain NCCB 100053 compared with the treatment that received the application of S° alone”
t0“maize”
Claim · model-written summary
Rhizobium NCCB 100054 significantly inhibited maize growth with or without sulfur.
- Treatment
- Rhizobium strain NCCB 100054 with or without the application of S°e0
- Interactor
- Rhizobium strain NCCB 100054e0symbiont
- Outcome
- growthe0
- Direction
- inhibitione0
- Comparator
- application of S° alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was significant growth inhibition of maize plants in the treatment receiving Rhizobium strain NCCB 100054 with or without the application of S° compared with the treatment that included the application of S° alone”
Claim · model-written summary
Without sulfur, Rhizobium NCCB 100054 lowered N, P, S, Fe, Mn, Zn and Cu in roots and shoots.
- Organ / stage
- roots and shootse0
- Outcome
- levels of N, P, S, Fe, Mn, Zn, and Cue0
- Direction
- decreasee0
- Qualifier
- in the absence of S°e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This growth inhibition was associated with a significant decrease in the levels of N, P, S, Fe, Mn, Zn, and Cu in roots and shoots in the absence of S°”
t0“maize”
Claim · model-written summary
With sulfur, Rhizobium NCCB 100054 significantly reduced N, S and Fe in maize roots.
- Organ / stage
- rootse0
- Treatment
- Rhizobium strain NCCB 100054 applied with S°e0
- Interactor
- Rhizobium strain NCCB 100054e0symbiont
- Outcome
- levels of N, S, and Fee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rhizobium strain NCCB 100054 applied with S° significantly decreased the levels of N, S, and Fe in the roots”
t0“maize”
Claim · model-written summary
With sulfur, Rhizobium NCCB 100054 significantly reduced N, P, S, Fe, Mn and Cu in shoots.
- Organ / stage
- shootse0
- Treatment
- Rhizobium strain NCCB 100054 applied with S°e0
- Interactor
- Rhizobium strain NCCB 100054e0symbiont
- Outcome
- levels of N, P, S, Fe, Mn, and Cue0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rhizobium strain NCCB 100054 applied with S° significantly decreased the levels of N, S, and Fe in the roots and the levels of N, P, S, Fe, Mn, and Cu in the shoots of maize”
t0“maize”
Claim · model-written summary
With sulfur, Rhizobium NCCB 100054 did not significantly alter root P and Mn or shoot Zn.
- Treatment
- Rhizobium strain NCCB 100054 applied with S°e0
- Interactor
- Rhizobium strain NCCB 100054e0symbiont
- Outcome
- levels of P and Mn in the roots and in the levels of Zn in the shootse0
- Direction
- no significant differencese0
- Comparator
- treatment with S° alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rhizobium strain NCCB 100054 applied with S° significantly decreased the levels of N, S, and Fe in the roots and the levels of N, P, S, Fe, Mn, and Cu in the shoots of maize, with no significant differences in the levels of P and Mn in the roots and in the levels of Zn in the shoots, compared with the treatment with S° alone”
t0“maize”
Claim · model-written summary
The authors propose Paracoccus versutus with sulfur as a soil conditioner for horticulture.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the treatment P. versutus combined with S° can be effective as a soil conditioner for horticultural production in calcareous sandy soils”
t0“maize”
The same questions in other papers
Rhizobium · nutrient: content · Zea mays (maize)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
Rhizobium · growth · Zea mays (maize)Positive and negative results
7 in the opposite direction
- positive
- positive
- positive
4 papers more in this group
See all 8 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.