Abstract
Plant growth-promoting rhizobacteria (PGPR) are naturally occurring soil microorganisms that colonize roots and stimulate plant growth. Some PGPR strains can directly regulate plant growth in the absence of physical contact with the plant, via volatile organic compounds (VOCs) emissions. Recently, we have described that Arabidopsis thaliana respond differentially to diacetyl, a VOC from Bacillus amyloliquefaciens strain GB03 (GB03), through integral modulation of the immune system and the phosphate-starvation response (PSR) system, resulting in either mutualism or immunity. Under phosphate deficient conditions, diacetyl enhances salicylic acid- and jasmonic acid-mediated immunity and consequently causes plant hyper-sensitivity to phosphate deficiency. Here, we show that application of exogenous gibberellin (GA) partially alleviates the deleterious effect caused by either B. amyloliquefaciens GB03 VOCs or diacetyl in Arabidopsis under phosphate deficient conditions, while DELLA quadruple mutant exposed to GB03 VOCs exhibits a partial reduction on the stress symptoms. Moreover, diacetyl appears to enhance DELLA protein accumulation and increase the expression of several GA deactivation-related genes. These findings suggest that the DELLA-mediated GA signaling pathway is involved in the bi-faceted role of GB03 VOCs in regulating plant growth.
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Claims 5
Claim · model-written summary
Exogenous gibberellin partially alleviated the harmful effect of GB03 volatiles in phosphate deficient Arabidopsis.
- Taxon
- Arabidopsis
Arabidopsise0 - Treatment
- application of exogenous gibberellin (GA)e0
- Interactor
- B. amyloliquefaciens GB03
.jpg?width=60)
Bacillus amyloliquefaciense0symbiont - Outcome
- deleterious effect caused by either B. amyloliquefaciens GB03 VOCs or diacetyle0
- Direction
- partially alleviatese0
- Qualifier
- under phosphate deficient conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“application of exogenous gibberellin (GA) partially alleviates the deleterious effect caused by either B. amyloliquefaciens GB03 VOCs or diacetyl in Arabidopsis under phosphate deficient conditions”
Claim · model-written summary
Exogenous gibberellin partially alleviated the harmful effect of diacetyl in phosphate deficient Arabidopsis.
- Taxon
- ArabidopsisArabidopsise0
- Treatment
- application of exogenous gibberellin (GA)e0
- Outcome
- deleterious effect caused by either B. amyloliquefaciens GB03 VOCs or diacetyle0
- Direction
- partially alleviatese0
- Qualifier
- under phosphate deficient conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of exogenous gibberellin (GA) partially alleviates the deleterious effect caused by either B. amyloliquefaciens GB03 VOCs or diacetyl in Arabidopsis under phosphate deficient conditions”
Claim · model-written summary
The DELLA quadruple mutant had partially reduced stress symptoms after GB03 volatile exposure.
- Taxon
- ArabidopsisArabidopsise1
- Material
- DELLA quadruple mutante0
- Treatment
- GB03 VOCse0
- Interactor
- GB03e0symbiont
- Outcome
- stress symptomse0
- Direction
- partial reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“DELLA quadruple mutant exposed to GB03 VOCs exhibits a partial reduction on the stress symptoms”
e1“Arabidopsis under phosphate deficient conditions”
Claim · model-written summary
Diacetyl appeared to increase DELLA protein accumulation.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Treatment
- diacetyle0
- Gene
- DELLAe0
- Outcome
- DELLA protein accumulatione0
- Direction
- enhancee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“diacetyl appears to enhance DELLA protein accumulation”
e1“Arabidopsis thaliana respond differentially to diacetyl”
Claim · model-written summary
Diacetyl appeared to increase expression of several GA deactivation genes.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Treatment
- diacetyle0
- Gene
- GA deactivation-related genese0
- Outcome
- expression of several GA deactivation-related genese0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“diacetyl appears to enhance DELLA protein accumulation and increase the expression of several GA deactivation-related genes”
e1“Arabidopsis thaliana respond differentially to diacetyl”
The same questions in other papers
class · quality: phytochemicals · ArabidopsisResults agree
2 papers in the same direction as this paper
- positive
- positive
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.