Abstract
Aims Since most phosphate solubilizing bacteria (PSB) also produce 1-aminocyclopropane-1-carboxylate (ACC) deaminase, we investigated if there was an association between these two plant growth-promoting properties under in vitro conditions. Methods and Results A total of 841 bacterial isolates were obtained using selective and enrichment isolation methods. ACC deaminase was investigated using in vitro methods and by sequencing the acdS gene. The effect of ACC deaminase on P solubilization was investigated further using five efficient PSB. ACC deaminase production ability was found amongst a wide range of bacteria belonging to the genera Bacillus, Burkholderia, Pseudomonas and Variovorax. The amount of ACC deaminase produced by PSB was significantly associated with the liberation of Pi from Ca-P when ACC was the sole N source. Ca-P solubilization was associated with the degree of acidification of the medium. Additionally, the P solubilization potential of PSB with (NH4)2SO4 was determined by the type of carboxylates produced. An in-planta experiment was conducted using Burkholderia sp. 12F on chickpea cv. Genesis-863 in sand : vermiculite (1 : 1 v/v) amended with rock phosphate and inoculation of this efficient PSB significantly increased growth, nodulation and P uptake of chickpea fertilized with rock phosphate. Conclusion ACC deaminase activity influenced the capacity of PSB to solubilize P from Ca-P when ACC was the sole N source and Burkholderia sp. 12F promoted the chickpea-Mesorhizobium symbiosis. Significance and Impact of the Study ACC deaminase activity could enhance the P solubilizing activity of rhizobacteria that improve plant growth.
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Claims 8
Claim · model-written summary
ACC deaminase production occurred across Bacillus, Burkholderia, Pseudomonas and Variovorax isolates.
- Taxon
- chickpea
Cicer arietinumt0 - Interactor
- Bacilluse0symbiont
- Outcome
- ACC deaminase production abilitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ACC deaminase production ability was found amongst a wide range of bacteria belonging to the genera Bacillus, Burkholderia, Pseudomonas and Variovorax”
t0“chickpea”
Claim · model-written summary
ACC deaminase production by phosphate solubilizing bacteria was significantly associated with Pi liberation from Ca-P when ACC was the sole N source.
- Taxon
- chickpeaCicer arietinumt0
- Compound
- ACCe0
- Outcome
- liberation of Pi from Ca-Pe0
- Qualifier
- when ACC was the sole N sourcee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The amount of ACC deaminase produced by PSB was significantly associated with the liberation of Pi from Ca-P when ACC was the sole N source”
t0“chickpea”
Claim · model-written summary
Ca-P solubilization was associated with medium acidification.
- Taxon
- chickpeaCicer arietinumt0
- Compound
- acidification of the mediume0
- Outcome
- Ca-P solubilizatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ca-P solubilization was associated with the degree of acidification of the medium”
t0“chickpea”
Claim · model-written summary
Carboxylate type determined the P solubilization potential of PSB with (NH4)2SO4.
- Taxon
- chickpeaCicer arietinumt0
- Compound
- carboxylatese0
- Outcome
- P solubilization potential of PSBe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the P solubilization potential of PSB with (NH4)2SO4 was determined by the type of carboxylates produced”
t0“chickpea”
Claim · model-written summary
Burkholderia sp. 12F inoculation increased chickpea growth with rock phosphate fertilization.
- Taxon
- chickpeaCicer arietinume0
- Treatment
- inoculation of this efficient PSBe0
- Interactor
- Burkholderia sp. 12Fe1symbiont
- Outcome
- growthe0
- Direction
- increasede0
- Qualifier
- fertilized with rock phosphatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inoculation of this efficient PSB significantly increased growth, nodulation and P uptake of chickpea fertilized with rock phosphate”
e1“Burkholderia sp. 12F on chickpea cv. Genesis-863”
Claim · model-written summary
Burkholderia sp. 12F inoculation increased chickpea nodulation with rock phosphate fertilization.
- Taxon
- chickpeaCicer arietinume0
- Treatment
- inoculation of this efficient PSBe0
- Interactor
- Burkholderia sp. 12Fe1symbiont
- Outcome
- nodulatione0
- Direction
- increasede0
- Qualifier
- fertilized with rock phosphatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inoculation of this efficient PSB significantly increased growth, nodulation and P uptake of chickpea fertilized with rock phosphate”
e1“Burkholderia sp. 12F on chickpea cv. Genesis-863”
Claim · model-written summary
Burkholderia sp. 12F inoculation increased chickpea P uptake with rock phosphate fertilization.
- Taxon
- chickpeaCicer arietinume0
- Treatment
- inoculation of this efficient PSBe0
- Interactor
- Burkholderia sp. 12Fe1symbiont
- Outcome
- P uptakee0
- Direction
- increasede0
- Qualifier
- fertilized with rock phosphatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inoculation of this efficient PSB significantly increased growth, nodulation and P uptake of chickpea fertilized with rock phosphate”
e1“Burkholderia sp. 12F on chickpea cv. Genesis-863”
Claim · model-written summary
Burkholderia sp. 12F promoted the chickpea-Mesorhizobium symbiosis.
- Taxon
- chickpeaCicer arietinume0
- Interactor
- Mesorhizobium
.jpg?width=60)
Mesorhizobiume0symbiont - Second interactor
- Burkholderia sp. 12Fe0symbiont
- Outcome
- chickpea-Mesorhizobium symbiosise0
- Direction
- promotede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Burkholderia sp. 12F promoted the chickpea-Mesorhizobium symbiosis”
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