Abstract
Salinity and medium pH are critical abiotic factors influencing plant growth, yet their interactive effects remain poorly understood. This study aimed to evaluate the primary and interacting effects of medium pH and sodium chloride (NaCl) on the in vitro development of Medicago sativa L. (cv. CUF 101). A 3 × 4 factorial design was employed to investigate pH levels of 4.5, 6.5, and 8.5 in conjunction with NaCl concentrations of 0, 60, 120, and 180 mM in a completely randomized design, with growth traits (root and shoot length, biomass, and leaf number) measured after 21 days of germination. This approach allowed us to capture responses across varying gradients of saline-pH stress. The effects of pH, salinity, and their interaction were all found to be highly significant (p < 0.01). Near-neutral pH (6.5) consistently maximized biomass and exhibited antagonistic effects by alleviating the growth inhibition caused by NaCl. Conversely, acidic conditions (pH 4.5) combined with NaCl produced synergistic effects, resulting in disproportionate shoot elongation without an accompanying increase in their biomass. Under alkaline conditions (pH 8.5) with NaCl, the interaction also acted synergistically, severely inhibiting root elongation and indicating an early failure of root establishment. Salinity imposed a range of penalties on all traits, exhibiting significant reductions beyond approximately 120 mM and approaching a critical collapse at 180 mM. The correlations among traits indicated a trade-off in stress allocation: root length was positively correlated with total biomass and negatively correlated with shoot elongation and leaf number. These findings demonstrate that precise pH management is essential for optimizing salt tolerance in alfalfa with implications for cultivar screening under saline-alkaline stress.
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Claims 8
Claim · model-written summary
Near-neutral pH (6.5) consistently maximized biomass of alfalfa in vitro.
- Taxon
- Medicago sativa
Medicago sativae0 - Treatment
- Near-neutral pH (6.5)e1
- Outcome
- biomasse1
- Direction
- maximizede1
- Setting
- in vitroe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on the in vitro development of Medicago sativa L. (cv. CUF 101)”
e1“Near-neutral pH (6.5) consistently maximized biomass and exhibited antagonistic effects by alleviating the growth inhibition caused by NaCl”
Claim · model-written summary
Near-neutral pH (6.5) alleviated the NaCl-induced growth inhibition of alfalfa, an antagonistic interaction.
- Taxon
- Medicago sativaMedicago sativae0
- Treatment
- Near-neutral pH (6.5)e1
- Outcome
- growth inhibition caused by NaCle1
- Direction
- alleviatinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on the in vitro development of Medicago sativa L. (cv. CUF 101)”
e1“Near-neutral pH (6.5) consistently maximized biomass and exhibited antagonistic effects by alleviating the growth inhibition caused by NaCl”
Claim · model-written summary
Acidic conditions (pH 4.5) combined with NaCl produced disproportionate shoot elongation without an accompanying increase in biomass.
- Taxon
- Medicago sativaMedicago sativae0
- Treatment
- acidic conditions (pH 4.5) combined with NaCle2
- Outcome
- shoot elongatione2
- Direction
- disproportionatee2
- Qualifier
- without an accompanying increase in their biomasse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on the in vitro development of Medicago sativa L. (cv. CUF 101)”
e2“acidic conditions (pH 4.5) combined with NaCl produced synergistic effects, resulting in disproportionate shoot elongation without an accompanying increase in their biomass”
Claim · model-written summary
Alkaline conditions (pH 8.5) combined with NaCl severely inhibit root elongation of alfalfa.
- Taxon
- Medicago sativaMedicago sativae0
- Treatment
- alkaline conditions (pH 8.5) with NaCle3
- Outcome
- root elongatione3
- Direction
- severely inhibitinge3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on the in vitro development of Medicago sativa L. (cv. CUF 101)”
e3“Under alkaline conditions (pH 8.5) with NaCl, the interaction also acted synergistically, severely inhibiting root elongation and indicating an early failure of root establishment”
Claim · model-written summary
Salinity significantly reduced all traits beyond approximately 120 mM NaCl and approached a critical collapse at 180 mM.
- Taxon
- Medicago sativaMedicago sativae0
- Treatment
- Salinitye4
- Outcome
- all traitse4
- Direction
- significant reductionse4
- Qualifier
- beyond approximately 120 mM and approaching a critical collapse at 180 mMe4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on the in vitro development of Medicago sativa L. (cv. CUF 101)”
e4“Salinity imposed a range of penalties on all traits, exhibiting significant reductions beyond approximately 120 mM and approaching a critical collapse at 180 mM”
Claim · model-written summary
Root length is positively correlated with total biomass in alfalfa seedlings.
- Taxon
- Medicago sativaMedicago sativae0
- Organ / stage
- roote5
- Outcome
- total biomasse5
- Direction
- positively correlatede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on the in vitro development of Medicago sativa L. (cv. CUF 101)”
e5“root length was positively correlated with total biomass and negatively correlated with shoot elongation and leaf number”
Claim · model-written summary
Root length is negatively correlated with shoot elongation and leaf number in alfalfa seedlings.
- Taxon
- Medicago sativaMedicago sativae0
- Organ / stage
- roote5
- Outcome
- shoot elongation and leaf numbere5
- Direction
- negatively correlatede5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on the in vitro development of Medicago sativa L. (cv. CUF 101)”
e5“root length was positively correlated with total biomass and negatively correlated with shoot elongation and leaf number”
Claim · model-written summary
Effects of pH, salinity and their interaction on the measured traits are highly significant.
- Taxon
- Medicago sativaMedicago sativae0
- Treatment
- pHe6
- Outcome
- effects of pH, salinity, and their interactione6
- Qualifier
- highly significant (p < 0.01)e6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on the in vitro development of Medicago sativa L. (cv. CUF 101)”
e6“The effects of pH, salinity, and their interaction were all found to be highly significant (p < 0.01)”
The same questions in other papers
ph · growth · Medicago sativa (alfalfa)Positive and negative results
3 papers in the same direction as this paper · 9 in the opposite direction
- negative
- negative
- no effect
9 papers more in this group
See all 13 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.