Abstract
ABSTRACT Melon ( Cucumis melo L . ) is a globally significant crop, yet its productivity is increasingly threatened by rising soil salinity in many cultivation areas. In this context, plant growth‐promoting rhizobacteria (PGPR) have emerged as a promising strategy to enhance plant growth and improve tolerance to salinity stress. This study investigated the effect of inoculating melon seedlings with a previously characterized strain AXSa06 (identified as Pseudomonas oryzihabitans ) under salt stress (250 mM NaCl), focusing on plant growth, photosynthesis, antioxidant responses, metabolomic profiles, nutrient balance, abscisic acid (ABA) levels, and expression of ABA signaling pathway genes. Inoculation improved the growth and photosynthetic performance of melon plants under salt stress, while reducing Na + accumulation and facilitating better nutrient homeostasis. The elevated levels of malondialdehyde (MDA) and catalase (CAT), along with the increased ABA content upon inoculation, pointed to a priming effect that prepared plants to manage oxidative stress, as evidenced by the reduced antioxidant activity upon stress. Expression of CmPYL9 and several CmPP2AC isoforms was upregulated only in inoculated stressed plants, suggesting improved ABA sensitivity and a fine‐tuned transcriptional control of signaling. AXSa06‐inoculated stressed plants also displayed notable metabolic reprogramming, primarily affecting carbohydrate metabolism, following shifts in TCA cycle metabolites already evident under control conditions. Taken together, these findings suggest that AXSa06 could serve as a promising biostimulant agent improving melon tolerance to salt stress by modulating physiological and biochemical responses. This study offers valuable insights into PGPR‐driven stress priming and its role in developing strategies for sustainable crop production under saline conditions.
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Claims 11
Claim · model-written summary
Inoculation with strain AXSa06 improved growth and photosynthetic performance of melon plants under salt stress.
- Taxon
- melon
.jpg?width=60)
Cucumis meloe0 - Treatment
- Inoculatione0
- Interactor
- AXSa06e1symbiont
- Outcome
- growth and photosynthetic performancee0
- Direction
- improvede0
- Qualifier
- under salt stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Inoculation improved the growth and photosynthetic performance of melon plants under salt stress”
e1“strain AXSa06 (identified as Pseudomonas oryzihabitans )”
Claim · model-written summary
Inoculation reduced Na+ accumulation in melon plants under salt stress.
- Taxon
- melonCucumis meloe0
- Treatment
- Inoculatione0
- Interactor
- AXSa06e1symbiont
- Outcome
- Na + accumulatione0
- Direction
- reducinge0
- Qualifier
- under salt stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation improved the growth and photosynthetic performance of melon plants under salt stress, while reducing Na + accumulation”
e1“strain AXSa06 (identified as Pseudomonas oryzihabitans )”
Claim · model-written summary
Inoculation facilitated better nutrient homeostasis in melon plants under salt stress.
- Taxon
- melonCucumis meloe0
- Treatment
- Inoculatione0
- Interactor
- AXSa06e1symbiont
- Outcome
- nutrient homeostasise0
- Direction
- bettere0
- Qualifier
- under salt stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation improved the growth and photosynthetic performance of melon plants under salt stress, while reducing Na + accumulation and facilitating better nutrient homeostasis”
e1“strain AXSa06 (identified as Pseudomonas oryzihabitans )”
Claim · model-written summary
Levels of malondialdehyde (MDA) and catalase (CAT) were elevated in melon upon inoculation.
- Taxon
- MelonCucumis melot0
- Treatment
- inoculatione0
- Outcome
- levels of malondialdehyde (MDA) and catalase (CAT)e0
- Direction
- elevatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The elevated levels of malondialdehyde (MDA) and catalase (CAT), along with the increased ABA content upon inoculation”
t0“Melon ( Cucumis melo )”
Claim · model-written summary
ABA content in melon increased upon inoculation.
- Taxon
- MelonCucumis melot0
- Treatment
- inoculatione0
- Outcome
- ABA contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the increased ABA content upon inoculation”
t0“Melon ( Cucumis melo )”
Claim · model-written summary
The authors interpret the elevated MDA, CAT and ABA as a priming effect that prepared melon plants to manage oxidative stress.
- Taxon
- MelonCucumis melot0
- Outcome
- oxidative stresse0
- Qualifier
- priming effecte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“pointed to a priming effect that prepared plants to manage oxidative stress”
t0“Melon ( Cucumis melo )”
Claim · model-written summary
Antioxidant activity was reduced upon stress in inoculated melon plants.
- Taxon
- MelonCucumis melot0
- Outcome
- antioxidant activitye0
- Direction
- reducede0
- Qualifier
- upon stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the reduced antioxidant activity upon stress”
t0“Melon ( Cucumis melo )”
Claim · model-written summary
Expression of CmPYL9 and several CmPP2AC isoforms was upregulated only in inoculated stressed melon plants.
- Taxon
- MelonCucumis melot0
- Treatment
- inoculated stressed plantse0
- Gene
- CmPYL9 and several CmPP2AC isoformse0
- Outcome
- Expressione0
- Direction
- upregulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Expression of CmPYL9 and several CmPP2AC isoforms was upregulated only in inoculated stressed plants”
t0“Melon ( Cucumis melo )”
Claim · model-written summary
AXSa06-inoculated stressed melon plants displayed notable metabolic reprogramming, primarily affecting carbohydrate metabolism.
- Taxon
- MelonCucumis melot0
- Outcome
- metabolic reprogramminge0
- Qualifier
- primarily affecting carbohydrate metabolisme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“notable metabolic reprogramming, primarily affecting carbohydrate metabolism”
t0“Melon ( Cucumis melo )”
Claim · model-written summary
Shifts in TCA cycle metabolites were already evident under control conditions in inoculated melon.
- Taxon
- MelonCucumis melot0
- Outcome
- TCA cycle metabolitese0
- Direction
- shiftse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“shifts in TCA cycle metabolites already evident under control conditions”
t0“Melon ( Cucumis melo )”
Claim · model-written summary
The authors suggest AXSa06 could serve as a biostimulant improving melon tolerance to salt stress.
- Taxon
- melonCucumis meloe0
- Outcome
- melon tolerance to salt stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AXSa06 could serve as a promising biostimulant agent improving melon tolerance to salt stress”
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See all 8 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.