Abstract
The present work was a study on the adverse effects of salinity on growth, nodulation, and some physiological parameters in 4 symbiotic combinations involving 2 Moroccan alfalfa (Medicago sativa L.) populations (Demnate and Tata) and 2 rhizobial strains (rhLAr 1 and rhLAr 4). The experiment was conducted in the greenhouse at 32/22 °C day/night, 50%-80% relative humidity, and a photoperiod of 16 h. The seedlings were separately inoculated with suspensions of 2 rhizobial strains and grown under 2 NaCl treatments, 0 mM (control) and 100 mM (salt stress), in plastic pots filled with sterile sand and peat at 9/10 and 1/10 ratios, respectively. The salt stress was applied for 5 weeks and some agro-physiological and biochemical parameters related to salt tolerance were assessed. The results showed that salinity significantly reduced the height of plants, their dry biomass, and nodulation. This constraint has also negatively affected the relative water content of leaves, the membrane permeability, the stomatal conductance, the maximum quantum yield of photosystem II, and the chlorophyll contents. Comparison among the symbiotic combinations tested showed that their behavior was significantly different. Plants inoculated with rhizobial strain rhLAr 4 were more tolerant to saline conditions. Their tolerance was associated with the maintaining of adequate levels in terms of physiological and biochemical parameters studied.
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Claims 6
Claim · model-written summary
Salinity significantly reduced alfalfa height, dry biomass and nodulation.
- Taxon
- alfalfa
Medicago sativae1 - Treatment
- 100 mM (salt stress)e2
- Outcome
- height of plants, their dry biomass, and nodulatione0
- Direction
- reducede0
- Comparator
- 0 mM (control)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The results showed that salinity significantly reduced the height of plants, their dry biomass, and nodulation.”
e1“alfalfa (Medicago sativa L.)”
e2“0 mM (control) and 100 mM (salt stress)”
Claim · model-written summary
Salinity negatively affected alfalfa leaf water content, membrane permeability and stomatal conductance.
- Taxon
- alfalfaMedicago sativae1
- Treatment
- 100 mM (salt stress)e2
- Outcome
- relative water content of leaves, the membrane permeability, the stomatal conductancee0
- Direction
- negatively affectede0
- Comparator
- 0 mM (control)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This constraint has also negatively affected the relative water content of leaves, the membrane permeability, the stomatal conductance, the maximum quantum yield of photosystem II, and the chlorophyll contents.”
e1“alfalfa (Medicago sativa L.)”
e2“0 mM (control) and 100 mM (salt stress)”
Claim · model-written summary
Salinity negatively affected alfalfa PSII maximum quantum yield and chlorophyll contents.
- Taxon
- alfalfaMedicago sativae1
- Treatment
- 100 mM (salt stress)e2
- Outcome
- maximum quantum yield of photosystem II, and the chlorophyll contentse0
- Direction
- negatively affectede0
- Comparator
- 0 mM (control)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This constraint has also negatively affected the relative water content of leaves, the membrane permeability, the stomatal conductance, the maximum quantum yield of photosystem II, and the chlorophyll contents.”
e1“alfalfa (Medicago sativa L.)”
e2“0 mM (control) and 100 mM (salt stress)”
Claim · model-written summary
The tested alfalfa–rhizobia combinations behaved significantly differently under salinity.
- Taxon
- alfalfaMedicago sativae1
- Outcome
- behaviore0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Comparison among the symbiotic combinations tested showed that their behavior was significantly different.”
e1“alfalfa (Medicago sativa L.)”
Claim · model-written summary
Alfalfa plants inoculated with rhLAr 4 were more salt tolerant.
- Taxon
- alfalfaMedicago sativae1
- Treatment
- inoculated with rhizobial strain rhLAr 4e0
- Interactor
- rhizobial strain rhLAr 4e0symbiont
- Outcome
- tolerant to saline conditionse0
- Direction
- more tolerante0
- Comparator
- rhLAr 1e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plants inoculated with rhizobial strain rhLAr 4 were more tolerant to saline conditions.”
e1“alfalfa (Medicago sativa L.)”
e2“rhLAr 1 and rhLAr 4”
Claim · model-written summary
Tolerance of rhLAr 4-inoculated alfalfa was associated with maintained physiological and biochemical levels.
- Taxon
- alfalfaMedicago sativae1
- Interactor
- rhizobial strain rhLAr 4e2symbiont
- Outcome
- tolerancee0
- Qualifier
- maintaining of adequate levels in terms of physiological and biochemical parameterse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Their tolerance was associated with the maintaining of adequate levels in terms of physiological and biochemical parameters studied.”
e1“alfalfa (Medicago sativa L.)”
e2“rhizobial strain rhLAr 4”
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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.