Abstract
Use of Plant growth promoting rhizobacteria (PGPR) is a promising strategy to improve the crop production under optimal or sub-optimal conditions. In the present study, five diazotrophic salt tolerant bacteria were isolated from the roots of a halophyte, Arthrocnemum indicum. The isolates were partially characterized in vitro for plant growth promoting traits and evaluated for their potential to promote growth and enhanced salt tolerance in peanut. The 16S rRNA gene sequence homology indicated that these bacterial isolates belong to the genera, Klebisiella, Pseudomonas, Agrobacterium and Ochrobactrum. All isolates were nifH positive and able to produce indole -3-acetic acid (ranging from 11.5 to 19.1 µg ml-1). The isolates showed phosphate solubilisation activity (ranging from 1.4 to 55.6 µg phosphate /mg dry weight), 1-aminocyclopropane-1-carboxylate deaminase activity (0.1 to 0.31 µmol α-kB/µg protein/h) and were capable of reducing acetylene in acetylene reduction assay (ranging from 0.95 to 1.8 µmol C2H4 mg protein/h). These isolates successfully colonized the peanut roots and were capable of promoting the growth under non-stress condition. A significant increase in total nitrogen (N) content (up to 76%) was observed over the non-inoculated control. All isolates showed tolerance to NaCl ranging from 4-8% in nutrient broth medium. Under salt stress, inoculated peanut seedlings maintained ion homeostasis, accumulated less reactive oxygen species (ROS) and showed enhanced growth compared to non-inoculated seedlings. Overall, the present study has characterized several potential bacterial strains that showed an enhanced growth promotion effect on peanut under control as well as saline conditions. The results show the possibility to reduce chemical fertilizer inputs and may promote the use of bio-inoculants.
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Claims 6
Claim · model-written summary
The bacterial isolates colonized peanut roots.
- Taxon
- peanut
Arachis hypogaeae0 - Outcome
- colonized the peanut rootse0
Not reportedInteractorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These isolates successfully colonized the peanut roots”
Claim · model-written summary
The isolates promoted peanut growth without salt stress.
Not reportedTaxonTreatmentComparator
Verbatim
e0“were capable of promoting the growth under non-stress condition.”
Claim · model-written summary
Inoculation significantly increased peanut total nitrogen content by up to 76% versus non-inoculated controls.
- Outcome
- total nitrogen (N) contente0
- Direction
- increasee0
- Value
- up to 76%e0
- Comparator
- non-inoculated controle0
Not reportedTaxonTreatment
Verbatim
e0“A significant increase in total nitrogen (N) content (up to 76%) was observed over the non-inoculated control.”
Claim · model-written summary
Inoculated peanut seedlings maintained ion homeostasis under salt stress relative to uninoculated seedlings.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- inoculatede0
- Outcome
- ion homeostasise0
- Direction
- maintainede0
- Comparator
- non-inoculated seedlingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under salt stress, inoculated peanut seedlings maintained ion homeostasis, accumulated less reactive oxygen species (ROS) and showed enhanced growth compared to non-inoculated seedlings.”
Claim · model-written summary
Inoculated peanut seedlings accumulated less ROS under salt stress than uninoculated seedlings.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- inoculatede0
- Outcome
- reactive oxygen species (ROS)e0
- Direction
- lesse0
- Comparator
- non-inoculated seedlingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under salt stress, inoculated peanut seedlings maintained ion homeostasis, accumulated less reactive oxygen species (ROS) and showed enhanced growth compared to non-inoculated seedlings.”
Claim · model-written summary
Inoculated peanut seedlings grew more under salt stress than uninoculated seedlings.
- Taxon
- peanutArachis hypogaeae0
- Treatment
- inoculatede0
- Outcome
- growthe0
- Direction
- enhancede0
- Comparator
- non-inoculated seedlingse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under salt stress, inoculated peanut seedlings maintained ion homeostasis, accumulated less reactive oxygen species (ROS) and showed enhanced growth compared to non-inoculated seedlings.”
The same questions in other 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
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See all 119 papers →inoculation · physiology: oxidative · Arachis hypogaea (peanut)Results agree
3 papers in the same direction as this paper
- positive
- 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.