Abstract
Context Salinity is one of the major abiotic stresses challenging alfalfa (Medicago sativa) production. Aims In this study, we evaluated the potential of nano-sized chitosan-proline (NsCP) seed priming and biochar application to enhance salt tolerance in alfalfa. Methods Seeds of two alfalfa genotypes (OMA-84, salt-sensitive; and OMA-285, salt-tolerant) were soaked for 18 h in aerated distilled water (hydropriming) or a solution of NsCP (100 mM) for seed priming. Seeds were then planted in plastic pots containing acid-washed pure sand supplemented with or without biochar (25 g kg−1 sand) and with or without salt stress (120 mM). Key results Both genotypes showed significant reduction in root and shoot growth, biomass production, and carbon assimilation under salinity stress, with more pronounced effects on OMA-84. However, applying both NsCP seed priming and biochar significantly improved the biomass production and plant photosynthetic assessment traits. Notably, this combined approach proved more effective in enhancing salt tolerance than individual treatments. Biochar amendment increased the Na+ and Cl− concentration but it also contributed to salt tolerance by elevating K+ level, promoting proline accumulation, and antioxidant activities. Conclusions NsCP seed priming enhanced the salinity stress tolerance in alfalfa genotypes by facilitating osmotic adjustment (proline accumulation), maintaining ionic homeostasis (higher K+ and lower Na+ concentration), and increasing the levels of α-tocopherol, flavonoids, and the activities of antioxidant enzymes. Implications Integrated application of NsCP and biochar significantly enhanced salt tolerance in alfalfa, demonstrating practical strategies for sustainable agriculture in saline environments by promoting ionic homeostasis, osmotic adjustment, and antioxidant defence mechanisms.
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Claims 8
Claim · model-written summary
Salinity significantly reduced root and shoot growth, biomass and carbon assimilation in both alfalfa genotypes, more strongly in OMA-84.
- Taxon
- alfalfa
Medicago sativae0 - Material
- two alfalfa genotypes (OMA-84, salt-sensitive; and OMA-285, salt-tolerant)e2
- Treatment
- salinity stresse1
- Outcome
- root and shoot growth, biomass production, and carbon assimilatione1
- Direction
- reductione1
- Qualifier
- more pronounced effects on OMA-84e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“challenging alfalfa (Medicago sativa) production”
e1“Both genotypes showed significant reduction in root and shoot growth, biomass production, and carbon assimilation under salinity stress, with more pronounced effects on OMA-84”
e2“Seeds of two alfalfa genotypes (OMA-84, salt-sensitive; and OMA-285, salt-tolerant)”
Claim · model-written summary
Applying NsCP seed priming and biochar together significantly improved biomass and photosynthetic assessment traits of alfalfa under salinity.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- NsCP seed priming and biochare2
- Outcome
- biomass production and plant photosynthetic assessment traitse2
- Direction
- improvede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“challenging alfalfa (Medicago sativa) production”
e2“applying both NsCP seed priming and biochar significantly improved the biomass production and plant photosynthetic assessment traits”
Claim · model-written summary
The combined NsCP and biochar approach was more effective in enhancing alfalfa salt tolerance than the individual treatments.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- this combined approache3
- Outcome
- enhancing salt tolerancee3
- Direction
- more effectivee3
- Comparator
- individual treatmentse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“challenging alfalfa (Medicago sativa) production”
e3“this combined approach proved more effective in enhancing salt tolerance than individual treatments”
Claim · model-written summary
Biochar amendment increased Na+ and Cl− concentration in alfalfa under salinity.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- Biochar amendmente4
- Outcome
- Na+ and Cl− concentratione4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“challenging alfalfa (Medicago sativa) production”
e4“Biochar amendment increased the Na+ and Cl− concentration”
Claim · model-written summary
Biochar also raised K+ level, proline accumulation and antioxidant activities in alfalfa under salinity.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- Biochar amendmente4
- Outcome
- K+ level, promoting proline accumulation, and antioxidant activitiese5
- Direction
- increaseinferrede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“challenging alfalfa (Medicago sativa) production”
e4“Biochar amendment increased the Na+ and Cl− concentration”
e5“contributed to salt tolerance by elevating K+ level, promoting proline accumulation, and antioxidant activities”
Claim · model-written summary
NsCP seed priming gave higher K+ in alfalfa under salinity.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- NsCP seed priminge6
- Outcome
- K+e6
- Direction
- highere6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“challenging alfalfa (Medicago sativa) production”
e6“NsCP seed priming enhanced the salinity stress tolerance in alfalfa genotypes by facilitating osmotic adjustment (proline accumulation), maintaining ionic homeostasis (higher K+ and lower Na+ concentration), and increasing the levels of α-tocopherol, flavonoids, and the activities of antioxidant enzymes”
Claim · model-written summary
NsCP seed priming gave lower Na+ concentration in alfalfa under salinity.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- NsCP seed priminge6
- Outcome
- Na+ concentratione6
- Direction
- lowere6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“challenging alfalfa (Medicago sativa) production”
e6“NsCP seed priming enhanced the salinity stress tolerance in alfalfa genotypes by facilitating osmotic adjustment (proline accumulation), maintaining ionic homeostasis (higher K+ and lower Na+ concentration), and increasing the levels of α-tocopherol, flavonoids, and the activities of antioxidant enzymes”
Claim · model-written summary
NsCP seed priming increased α-tocopherol, flavonoid levels and antioxidant enzyme activities in alfalfa under salinity.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- NsCP seed priminge6
- Outcome
- the levels of α-tocopherol, flavonoids, and the activities of antioxidant enzymese6
- Direction
- increasinge6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“challenging alfalfa (Medicago sativa) production”
e6“NsCP seed priming enhanced the salinity stress tolerance in alfalfa genotypes by facilitating osmotic adjustment (proline accumulation), maintaining ionic homeostasis (higher K+ and lower Na+ concentration), and increasing the levels of α-tocopherol, flavonoids, and the activities of antioxidant enzymes”
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nanoparticle · physiology: photosynthesis · Medicago sativa (alfalfa)Results agree
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See all 5 papers →8 of 9 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.