Abstract
Water stress is a major constraint on peanut (Arachis hypogaea L.) production, as it limits plant growth and biological nitrogen fixation. The development of long-lasting microbial inoculants is a key strategy for mitigating these effects. This study investigated whether the addition of trehalose improves the long-term functionality of Bradyrhizobium sp. SEMIA 6144 when encapsulated in alginate beads, and how this influences peanut yield under water stress conditions. Encapsulated bacteria, with and without trehalose, were stored for 12 months, and their ability to interact with plants at an early stage and promote plant growth was examined. Storage increased bacterial motility and aggregation, while biofilm formation remained stable. Trehalose supplementation significantly enhanced root adhesion, increasing bacterial colonization by approximately 105%. In pot experiments, inoculation with the encapsulated bacteria improved plant growth and nodulation under stress conditions. Plants inoculated with fresh beads exhibited increases in shoot length of up to 24%, maintaining higher biomass than uninoculated controls. Encapsulated formulations also mitigated the effects of drought on nodulation and physiological parameters. Overall, trehalose-enriched alginate encapsulation preserves bacterial functionality during long-term storage and enhances plant–microbe interactions, thereby improving peanut resilience under water stress and offering a promising strategy for the development of sustainable bioinoculants.
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Claims 8
Claim · model-written summary
Storage increased Bradyrhizobium motility and aggregation.
- Taxon
- Arachis hypogaea L.
Arachis hypogaeat0 - Interactor
- Bradyrhizobium sp. SEMIA 6144
Bradyrhizobium sp. SEMIA 6144e1symbiont - Outcome
- bacterial motility and aggregatione0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arachis hypogaea L.”
e0“Storage increased bacterial motility and aggregation”
e1“Bradyrhizobium sp. SEMIA 6144”
Claim · model-written summary
Bacterial biofilm formation remained stable after storage.
- Taxon
- Arachis hypogaea L.Arachis hypogaeat0
- Interactor
- Bradyrhizobium sp. SEMIA 6144Bradyrhizobium sp. SEMIA 6144e1symbiont
- Outcome
- biofilm formatione0
- Direction
- remained stablee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arachis hypogaea L.”
e0“biofilm formation remained stable”
e1“Bradyrhizobium sp. SEMIA 6144”
Claim · model-written summary
Trehalose supplementation increased bacterial root colonization by approximately 105%.
- Taxon
- Arachis hypogaea L.Arachis hypogaeat0
- Treatment
- Trehalose supplementatione0
- Interactor
- Bradyrhizobium sp. SEMIA 6144Bradyrhizobium sp. SEMIA 6144e1symbiont
- Outcome
- bacterial colonizatione0
- Direction
- increasinge0
- Value
- approximately 105%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arachis hypogaea L.”
e0“Trehalose supplementation significantly enhanced root adhesion, increasing bacterial colonization by approximately 105%”
e1“Bradyrhizobium sp. SEMIA 6144”
Claim · model-written summary
Encapsulated bacterial inoculation improved plant growth under stress.
- Taxon
- Arachis hypogaea L.Arachis hypogaeat0
- Treatment
- inoculation with the encapsulated bacteriae0
- Interactor
- Bradyrhizobium sp. SEMIA 6144Bradyrhizobium sp. SEMIA 6144e1symbiont
- Outcome
- plant growthe0
- Direction
- improvede0
- Qualifier
- under stress conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arachis hypogaea L.”
e0“inoculation with the encapsulated bacteria improved plant growth and nodulation under stress conditions”
e1“Bradyrhizobium sp. SEMIA 6144”
Claim · model-written summary
Encapsulated bacterial inoculation improved nodulation under stress.
- Taxon
- Arachis hypogaea L.Arachis hypogaeat0
- Treatment
- inoculation with the encapsulated bacteriae0
- Interactor
- Bradyrhizobium sp. SEMIA 6144Bradyrhizobium sp. SEMIA 6144e1symbiont
- Outcome
- nodulatione0
- Direction
- improvede0
- Qualifier
- under stress conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arachis hypogaea L.”
e0“inoculation with the encapsulated bacteria improved plant growth and nodulation under stress conditions”
e1“Bradyrhizobium sp. SEMIA 6144”
Claim · model-written summary
Fresh-bead inoculation increased shoot length by up to 24%.
- Taxon
- Arachis hypogaea L.Arachis hypogaeat0
- Treatment
- inoculated with fresh beadse0
- Interactor
- Bradyrhizobium sp. SEMIA 6144Bradyrhizobium sp. SEMIA 6144e1symbiont
- Outcome
- shoot lengthe0
- Direction
- increasese0
- Value
- up to 24%e0
- Comparator
- uninoculated controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arachis hypogaea L.”
e0“Plants inoculated with fresh beads exhibited increases in shoot length of up to 24%, maintaining higher biomass than uninoculated controls”
e1“Bradyrhizobium sp. SEMIA 6144”
Claim · model-written summary
Fresh-bead inoculation maintained higher biomass than uninoculated controls.
- Taxon
- Arachis hypogaea L.Arachis hypogaeat0
- Treatment
- inoculated with fresh beadse0
- Interactor
- Bradyrhizobium sp. SEMIA 6144Bradyrhizobium sp. SEMIA 6144e1symbiont
- Outcome
- biomasse0
- Direction
- highere0
- Comparator
- uninoculated controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arachis hypogaea L.”
e0“Plants inoculated with fresh beads exhibited increases in shoot length of up to 24%, maintaining higher biomass than uninoculated controls”
e1“Bradyrhizobium sp. SEMIA 6144”
Claim · model-written summary
Encapsulated formulations mitigated drought effects on nodulation and physiological parameters.
- Taxon
- Arachis hypogaea L.Arachis hypogaeat0
- Treatment
- Encapsulated formulationse0
- Interactor
- Bradyrhizobium sp. SEMIA 6144Bradyrhizobium sp. SEMIA 6144e1symbiont
- Outcome
- effects of drought on nodulation and physiological parameterse0
- Direction
- mitigatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arachis hypogaea L.”
e0“Encapsulated formulations also mitigated the effects of drought on nodulation and physiological parameters”
e1“Bradyrhizobium sp. SEMIA 6144”