Abstract
Abstract Purpose This study investigated the effect of salt stress on growth, water status, and photosynthetic activity in faba bean plants and the role of salicylic acid (SA) in mitigating the harmful effects of salt stress. Methods Faba bean plants were subjected to different levels of salt stress (0, 90, 120, and 150 mM NaCl) and salicylic acid (0, 0.5, and 1 mM SA). Salt and SA treatments were applied starting from the seedling stage and continued for two months. Results Results show that salt stress significantly affects the different studied parameters. Salinity strongly decreases the plant weight (fresh and dry) and the plant water status (Leaf Water Potential (LWP), Stomatal conductance (gs), Relative water content (RWC). The analysis of the Photosystem II (PSII) function disruption indicates that salt stress induced an electron transport inhibition at the donor side of the PSII due to the Oxygen-Evolving Complex (OEC) inactivation (positive-K-band) and reduced the PSII unit’s energetic connectivity (positive-L-band). The evaluation of the rate reduction of the end electron acceptor at the Photosystem I (PSI) side revealed that salt stress resulted in gradual decreases in the reduction rates. Nevertheless, the exogenous application of salicylic acid (SA) allowed plants to maintain a high weight/length value with a significant improvement in plant water status. Chlorophyll -a fluorescence analysis shows that SA application improved at the donor side of electron transport (lower intensity of the K and L-band), with a larger pool size under the combination of 0.5 mM SA and high salt stress levels applications. Conclusion These results suggest that the salt stress significantly affects the PSII by the inactivation of the OEC and decreasing the PSII unit’s connectivity. However, SA had a beneficial effect on the PSII and PSI salt stress tolerance in Vicia faba L.
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Claims 10
Claim · model-written summary
Salinity decreased fresh and dry plant weight.
Not reportedComparator
Verbatim
e0“Salinity strongly decreases the plant weight (fresh and dry) and the plant water status (Leaf Water Potential (LWP), Stomatal conductance (gs), Relative water content (RWC)”
t0“Vicia Faba L.”
Claim · model-written summary
Salinity decreased leaf water potential, stomatal conductance and relative water content.
- Taxon
- Vicia Faba L.t0
- Treatment
- Salinitye0
- Outcome
- plant water status (Leaf Water Potential (LWP), Stomatal conductance (gs), Relative water content (RWC)e0
- Direction
- decreasese0
Not reportedComparator
Verbatim
e0“Salinity strongly decreases the plant weight (fresh and dry) and the plant water status (Leaf Water Potential (LWP), Stomatal conductance (gs), Relative water content (RWC)”
t0“Vicia Faba L.”
Claim · model-written summary
Salt stress inhibited electron transport at PSII donor side through OEC inactivation.
Verbatim
e0“salt stress induced an electron transport inhibition at the donor side of the PSII due to the Oxygen-Evolving Complex (OEC) inactivation (positive-K-band)”
t0“Vicia Faba L.”
Claim · model-written summary
Salt stress reduced PSII energetic connectivity.
- Taxon
- Vicia Faba L.t0
- Treatment
- salt stresse0
- Outcome
- PSII unit’s energetic connectivitye0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“salt stress induced an electron transport inhibition at the donor side of the PSII due to the Oxygen-Evolving Complex (OEC) inactivation (positive-K-band) and reduced the PSII unit’s energetic connectivity (positive-L-band)”
t0“Vicia Faba L.”
Claim · model-written summary
Salt stress gradually decreased reduction rates at the PSI end acceptor.
Not reportedComparator
Verbatim
e0“salt stress resulted in gradual decreases in the reduction rates”
t0“Vicia Faba L.”
Claim · model-written summary
Salicylic acid maintained high plant weight and length.
- Taxon
- Vicia Faba L.t0
- Treatment
- exogenous application of salicylic acid (SA)e0
- Outcome
- weight/length valuee0
- Direction
- highe0
Not reportedComparator
Verbatim
e0“the exogenous application of salicylic acid (SA) allowed plants to maintain a high weight/length value with a significant improvement in plant water status”
t0“Vicia Faba L.”
Claim · model-written summary
Salicylic acid significantly improved water status.
- Taxon
- Vicia Faba L.t0
- Treatment
- exogenous application of salicylic acid (SA)e0
- Outcome
- plant water statuse0
- Direction
- improvemente0
Not reportedComparator
Verbatim
e0“the exogenous application of salicylic acid (SA) allowed plants to maintain a high weight/length value with a significant improvement in plant water status”
t0“Vicia Faba L.”
Claim · model-written summary
Salicylic acid improved donor-side electron transport, with lower K and L band intensity.
- Taxon
- Vicia Faba L.t0
- Treatment
- SA applicatione0
- Outcome
- donor side of electron transporte0
- Direction
- improvede0
Not reportedComparator
Verbatim
e0“SA application improved at the donor side of electron transport (lower intensity of the K and L-band)”
t0“Vicia Faba L.”
Claim · model-written summary
At 0.5 mM SA with high salt, the pool size was larger.
- Taxon
- Vicia Faba L.t0
- Treatment
- combination of 0.5 mM SA and high salt stress levels applicationse0
- Outcome
- pool sizee0
- Direction
- largere0
Not reportedComparator
Verbatim
e0“with a larger pool size under the combination of 0.5 mM SA and high salt stress levels applications”
t0“Vicia Faba L.”
Claim · model-written summary
Authors conclude SA benefits PSII and PSI salt tolerance.
- Taxon
- Vicia faba L.
Vicia fabae0 - Outcome
- PSII and PSI salt stress tolerancee0
- Direction
- beneficial effecte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SA had a beneficial effect on the PSII and PSI salt stress tolerance in Vicia faba L.”
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See all 22 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.