Abstract
Abstract Globally, drought stress poses a significant threat to crop productivity. Improving the drought tolerance of crops with microbial biostimulants is a sustainable strategy to meet a growing population’s demands. This research aimed to elucidate microbial biostimulants’ (Plant Growth Promoting Rhizobacteria) role in alleviating drought stress in oil-seed crops. In total, 15 bacterial isolates were selected for drought tolerance and screened for plant growth-promoting (PGP) attributes like phosphate solubilization and production of indole-3-acetic acid, siderophore, hydrogen cyanide, ammonia, and exopolysaccharide. This research describes two PGPR strains: Acinetobacter calcoaceticus AC06 and Bacillus amyloliquefaciens BA01. The present study demonstrated that these strains (AC06 and BA01) produced abundant osmolytes under osmotic stress, including proline (2.21 and 1.75 µg ml − 1 ), salicylic acid (18.59 and 14.21 µg ml − 1 ), trehalose (28.35 and 22.74 µg mg − 1 FW) and glycine betaine (11.35 and 7.74 mg g − 1 ) respectively. AC06 and BA01 strains were further evaluated for their multifunctional performance by inoculating in Arachis hypogaea L. (Groundnut) under mild and severe drought regimes (60 and 40% Field Capacity). Inoculation with microbial biostimulants displayed distinct osmotic-adjustment abilities of the groundnut, such as growth parameters, plant biomass, photosynthetic pigments, relative water content, proline, and soluble sugar in respective to control during drought. On the other hand, plant sensitivity indexes such as electrolyte leakage and malondialdehyde (MDA) contents were decreased as well as cooperatively conferred plant drought tolerance by induced alterations in stress indicators such as catalase (CAT), ascorbate peroxidase (APX), and superoxide dismutase (SOD). Thus, Acinetobacter sp. AC06 and Bacillus sp. BA01 can be considered as osmolyte producing microbial biostimulants to simultaneously induce osmotic tolerance and metabolic changes in groundnuts under drought stress.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 13
Claim · model-written summary
AC06 produced proline at 2.21 µg ml − 1 under osmotic stress.
- Taxon
- Arachis hypogaea L.
Arachis hypogaeae1 - Interactor
- Acinetobacter calcoaceticus AC06
Acinetobacter calcoaceticuse2symbiont - Outcome
- prolinee0
- Value
- 2.21e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AC06 and BA01) produced abundant osmolytes under osmotic stress, including proline (2.21 and 1.75 µg ml − 1 )”
e1“Arachis hypogaea L. (Groundnut)”
e2“Acinetobacter calcoaceticus AC06”
Claim · model-written summary
BA01 produced proline at 1.75 µg ml − 1 under osmotic stress.
- Taxon
- Arachis hypogaea L.Arachis hypogaeae1
- Interactor
- Bacillus amyloliquefaciens BA01
.jpg?width=60)
Bacillus amyloliquefaciense2symbiont - Outcome
- prolinee0
- Value
- 1.75 µg ml − 1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“AC06 and BA01) produced abundant osmolytes under osmotic stress, including proline (2.21 and 1.75 µg ml − 1 )”
e1“Arachis hypogaea L. (Groundnut)”
e2“Bacillus amyloliquefaciens BA01”
Claim · model-written summary
AC06 produced salicylic acid at 18.59 µg ml − 1 under osmotic stress.
- Taxon
- Arachis hypogaea L.Arachis hypogaeae1
- Interactor
- Acinetobacter calcoaceticus AC06Acinetobacter calcoaceticuse2symbiont
- Outcome
- salicylic acide0
- Value
- 18.59e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salicylic acid (18.59 and 14.21 µg ml − 1 )”
e1“Arachis hypogaea L. (Groundnut)”
e2“Acinetobacter calcoaceticus AC06”
Claim · model-written summary
BA01 produced salicylic acid at 14.21 µg ml − 1 under osmotic stress.
- Taxon
- Arachis hypogaea L.Arachis hypogaeae1
- Interactor
- Bacillus amyloliquefaciens BA01Bacillus amyloliquefaciense2symbiont
- Outcome
- salicylic acide0
- Value
- 14.21 µg ml − 1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salicylic acid (18.59 and 14.21 µg ml − 1 )”
e1“Arachis hypogaea L. (Groundnut)”
e2“Bacillus amyloliquefaciens BA01”
Claim · model-written summary
AC06 produced trehalose at 28.35 µg mg − 1 FW.
- Taxon
- Arachis hypogaea L.Arachis hypogaeae1
- Interactor
- Acinetobacter calcoaceticus AC06Acinetobacter calcoaceticuse2symbiont
- Outcome
- trehalosee0
- Value
- 28.35e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“trehalose (28.35 and 22.74 µg mg − 1 FW)”
e1“Arachis hypogaea L. (Groundnut)”
e2“Acinetobacter calcoaceticus AC06”
Claim · model-written summary
BA01 produced trehalose at 22.74 µg mg − 1 FW.
- Taxon
- Arachis hypogaea L.Arachis hypogaeae1
- Interactor
- Bacillus amyloliquefaciens BA01Bacillus amyloliquefaciense2symbiont
- Outcome
- trehalosee0
- Value
- 22.74 µg mg − 1 FWe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“trehalose (28.35 and 22.74 µg mg − 1 FW)”
e1“Arachis hypogaea L. (Groundnut)”
e2“Bacillus amyloliquefaciens BA01”
Claim · model-written summary
AC06 produced glycine betaine at 11.35 mg g − 1.
- Taxon
- Arachis hypogaea L.Arachis hypogaeae1
- Interactor
- Acinetobacter calcoaceticus AC06Acinetobacter calcoaceticuse2symbiont
- Outcome
- glycine betainee0
- Value
- 11.35e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“glycine betaine (11.35 and 7.74 mg g − 1 )”
e1“Arachis hypogaea L. (Groundnut)”
e2“Acinetobacter calcoaceticus AC06”
Claim · model-written summary
BA01 produced glycine betaine at 7.74 mg g − 1.
- Taxon
- Arachis hypogaea L.Arachis hypogaeae1
- Interactor
- Bacillus amyloliquefaciens BA01Bacillus amyloliquefaciense2symbiont
- Outcome
- glycine betainee0
- Value
- 7.74 mg g − 1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“glycine betaine (11.35 and 7.74 mg g − 1 )”
e1“Arachis hypogaea L. (Groundnut)”
e2“Bacillus amyloliquefaciens BA01”
Claim · model-written summary
Microbial inoculation improved groundnut growth parameters and biomass during drought versus control.
- Taxon
- Arachis hypogaea L.Arachis hypogaeae1
- Treatment
- Inoculation with microbial biostimulantse0
- Outcome
- growth parameters, plant biomasse0
- Qualifier
- during droughte0
- Comparator
- controle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation with microbial biostimulants displayed distinct osmotic-adjustment abilities of the groundnut, such as growth parameters, plant biomass, photosynthetic pigments, relative water content, proline, and soluble sugar in respective to control during drought.”
e1“Arachis hypogaea L. (Groundnut)”
Claim · model-written summary
Microbial inoculation altered groundnut photosynthetic pigments and water content during drought.
- Taxon
- Arachis hypogaea L.Arachis hypogaeae1
- Treatment
- Inoculation with microbial biostimulantse0
- Outcome
- photosynthetic pigments, relative water contente0
- Comparator
- controle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation with microbial biostimulants displayed distinct osmotic-adjustment abilities of the groundnut, such as growth parameters, plant biomass, photosynthetic pigments, relative water content, proline, and soluble sugar in respective to control during drought.”
e1“Arachis hypogaea L. (Groundnut)”
Claim · model-written summary
Microbial inoculation altered groundnut proline and soluble sugar during drought.
- Taxon
- Arachis hypogaea L.Arachis hypogaeae1
- Treatment
- Inoculation with microbial biostimulantse0
- Outcome
- proline, and soluble sugare0
- Comparator
- controle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation with microbial biostimulants displayed distinct osmotic-adjustment abilities of the groundnut, such as growth parameters, plant biomass, photosynthetic pigments, relative water content, proline, and soluble sugar in respective to control during drought.”
e1“Arachis hypogaea L. (Groundnut)”
Claim · model-written summary
Microbial inoculation decreased groundnut electrolyte leakage and MDA during drought.
- Taxon
- Arachis hypogaea L.Arachis hypogaeae1
- Treatment
- Inoculation with microbial biostimulantse2
- Outcome
- electrolyte leakage and malondialdehyde (MDA) contentse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plant sensitivity indexes such as electrolyte leakage and malondialdehyde (MDA) contents were decreased”
e1“Arachis hypogaea L. (Groundnut)”
e2“Inoculation with microbial biostimulants”
Claim · model-written summary
Microbial inoculation altered groundnut CAT, APX and SOD stress indicators.
- Taxon
- Arachis hypogaea L.Arachis hypogaeae1
- Treatment
- Inoculation with microbial biostimulantse2
- Gene
- catalase (CAT), ascorbate peroxidase (APX), and superoxide dismutase (SOD)e0
- Outcome
- stress indicatorse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“induced alterations in stress indicators such as catalase (CAT), ascorbate peroxidase (APX), and superoxide dismutase (SOD).”
e1“Arachis hypogaea L. (Groundnut)”
e2“Inoculation with microbial biostimulants”
The same questions in other papers
other · growth · Arachis hypogaea (peanut)Positive and negative results
18 papers in the same direction as this paper · 2 in the opposite direction
- positive
- no effect
- no effect
17 papers more in this group
See all 21 papers →inoculation · growth · Arachis hypogaea (peanut)Positive and negative results
101 papers in the same direction as this paper · 16 in the opposite direction · 1 reporting no difference from an alternative
- positive
- no effect
- no effect
115 papers more in this group
See all 119 papers →other · physiology: osmolytes · Arachis hypogaea (peanut)Results agree
1 paper in the same direction as this paper
- positive
other · physiology: photosynthesis · Arachis hypogaea (peanut)Results agree
1 paper in the same direction as this paper
- positive
other · physiology: oxidative · Arachis hypogaea (peanut)Results agree
1 paper in the same direction as this paper
- positive
inoculation · physiology: oxidative · Arachis hypogaea (peanut)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
inoculation · physiology: osmolytes · Arachis hypogaea (peanut)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →inoculation · physiology: photosynthesis · Arachis hypogaea (peanut)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.