Abstract
The objective of this study was to investigate whether plant-bacteria interaction affects the secretion of organic acids by both organisms and to assess whether the production of IAA by the bacterium increases the secretion of organic acids by root exudates, and if the stress produced by low available phosphorus (P) affects the production of organic acids by bacteria, by roots, or by root exudates in presence of bacterial cultures. With this purpose, we used as a biological model poplar plants and one strain of Burkholderia multivorans able to solubilize P. High performance liquid chromatography was utilized to measure organic acids. The tests, the inductive effects of exogenous indole-3-acetic acid (IAA) on secretion of organic acids, the 2 × 4 × 2 factorial design experiment, and the ability of organic acids to solubilize tricalcium phosphate were performed to investigate the interactive effects. The results showed that, after B. multivorans WS-FJ9 interacted with the poplar root system, the key phosphate-solubilizing driving force was gluconic acid (GA) which was produced in three ways: (1) secreted by the root system in the presence of IAA produced by B. multivorans WS-FJ9; (2) secreted by B. multivorans WS-FJ9; and (3) secreted by the poplar root system in the presence of phosphorus stress. When phosphorus stress was absent, the GA was produced as outlined in (1) and (2) above. These results demonstrated that inoculating B. multivorans WS-FJ9 into the poplar root system could increase the amount of GA secretion and implied that the interaction between B. multivorans WS-FJ9 and the poplar root system could contribute to the increase of P available fraction for poplar plants.
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Claims 6
Claim · model-written summary
After B. multivorans WS-FJ9 interacted with the poplar root system, gluconic acid was secreted by the root system in the presence of IAA produced by the bacterium.
- Interactor
- B. multivorans WS-FJ9Burkholderia multivoranse0symbiont
- Compound
- IAAe0
- Outcome
- gluconic acid (GA)e0
- Qualifier
- secreted by the root system in the presence of IAAe0
PopulusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“gluconic acid (GA) which was produced in three ways: (1) secreted by the root system in the presence of IAA produced by B. multivorans WS-FJ9”
t0“Poplar”
Claim · model-written summary
After the interaction, gluconic acid was also secreted by B. multivorans WS-FJ9 itself.
- Interactor
- B. multivorans WS-FJ9Burkholderia multivoranse0symbiont
- Outcome
- gluconic acid (GA)e0
- Qualifier
- secreted by B. multivorans WS-FJ9e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“gluconic acid (GA) which was produced in three ways: (1) secreted by the root system in the presence of IAA produced by B. multivorans WS-FJ9; (2) secreted by B. multivorans WS-FJ9”
t0“Poplar”
Claim · model-written summary
After the interaction, gluconic acid was secreted by the poplar root system in the presence of phosphorus stress.
- Treatment
- phosphorus stresse0
- Outcome
- gluconic acid (GA)e0
- Qualifier
- secreted by the poplar root systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“gluconic acid (GA) which was produced in three ways: (1) secreted by the root system in the presence of IAA produced by B. multivorans WS-FJ9; (2) secreted by B. multivorans WS-FJ9; and (3) secreted by the poplar root system in the presence of phosphorus stress”
Claim · model-written summary
When phosphorus stress was absent, gluconic acid was produced by the root system with bacterial IAA and by the bacterium.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When phosphorus stress was absent, the GA was produced as outlined in (1) and (2) above”
t0“Poplar”
Claim · model-written summary
Inoculating B. multivorans WS-FJ9 into the poplar root system could increase the amount of gluconic acid secretion.
- Treatment
- inoculating B. multivorans WS-FJ9e0
- Interactor
- B. multivorans WS-FJ9Burkholderia multivoranse0symbiont
- Outcome
- amount of GA secretione0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inoculating B. multivorans WS-FJ9 into the poplar root system could increase the amount of GA secretion”
Claim · model-written summary
The authors suggest the interaction between B. multivorans WS-FJ9 and poplar roots could contribute to a higher available phosphorus fraction for poplar.
- Interactor
- B. multivorans WS-FJ9Burkholderia multivoranse0symbiont
- Outcome
- P available fractione0
- Qualifier
- could contribute to the increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the interaction between B. multivorans WS-FJ9 and the poplar root system could contribute to the increase of P available fraction for poplar plants”
The same questions in other papers
inoculation · molecular: metabolites · Populus (poplar)Positive and negative results
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