Abstract
One-year old sweet almond (Prunus dulcis) seedlings were submitted to four levels of salt stress induced by NaCl, namely 0.3, 0.5, 0.7, and 1.0 S m-1. Effects of salt stress on a range of chlorophyll (Chl) fluorescence parameters (Chl FPs) and Chl contents were investigated in order to establish an eco-physiological characterization of P. dulcis to salinity. Salt stress promoted an increase in F0, Fs, and F0/Fm and a decrease in Fm, F'm, Fv/Fm, qP, ΔF/F'm, Fv/F0, and UQF(rel), in almost all Chl fluorescence yields (FY) and FPs due to its adverse effect on activity of photosystem 2. No significant changes were observed for quenchings qN, NPQ, and qN(rel). The contents of Chl a and b and their ratio were also significantly reduced at increased salt stress. In general, adverse salinity effects became significant when the electric conductivity of the nutrient solution (ECn) exceeded 0.3 S m-1. The most sensitive salt stress indicators were Fv/F0 and Chl a content, and they are thus best used for early salt detection in P. dulcis. Monitoring of a simple Chl FY, such as F0, also gave a good indication of induced salt stress due to the significant correlations observed between the different Chl FYs and FPs. Even essential Chl FYs, like F0, Fm, F'm, and Fs, and mutually independent Chl FPs, like Fv/F0 and qP, were strongly correlated with each other.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 9
Claim · model-written summary
Salt stress increased F0, Fs, and F0/Fm in sweet almond.
- Taxon
- Prunus dulcis
Prunus dulcist0 - Treatment
- Salt stresse0
- Outcome
- F0, Fs, and F0/Fme0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt stress promoted an increase in F0, Fs, and F0/Fm”
t0“Prunus dulcis”
Claim · model-written summary
Salt stress decreased Fm, F'm, Fv/Fm, qP, ΔF/F'm, Fv/F0, and UQF(rel) in sweet almond.
- Taxon
- Prunus dulcisPrunus dulcist0
- Treatment
- Salt stresse1
- Outcome
- Fm, F'm, Fv/Fm, qP, ΔF/F'm, Fv/F0, and UQF(rel)e0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt stress promoted an increase in F0, Fs, and F0/Fm and a decrease in Fm, F'm, Fv/Fm, qP, ΔF/F'm, Fv/F0, and UQF(rel)”
e1“Salt stress promoted an increase in F0, Fs, and F0/Fm and a decrease in Fm, F'm, Fv/Fm, qP, ΔF/F'm, Fv/F0, and UQF(rel)”
t0“Prunus dulcis”
Claim · model-written summary
Salt stress did not significantly change qN, NPQ, or qN(rel).
- Taxon
- Prunus dulcisPrunus dulcist0
- Treatment
- Salt stresse1
- Outcome
- quenchings qN, NPQ, and qN(rel)e0
- Direction
- No significant changese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No significant changes were observed for quenchings qN, NPQ, and qN(rel)”
e1“Salt stress promoted an increase in F0, Fs, and F0/Fm”
t0“Prunus dulcis”
Claim · model-written summary
Increased salt stress significantly reduced chlorophyll a and b contents and their ratio.
- Taxon
- Prunus dulcisPrunus dulcist0
- Treatment
- increased salt stresse0
- Outcome
- contents of Chl a and b and their ratioe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The contents of Chl a and b and their ratio were also significantly reduced at increased salt stress”
t0“Prunus dulcis”
Claim · model-written summary
Adverse salinity effects generally became significant above 0.3 S m-1 nutrient solution conductivity.
- Taxon
- Prunus dulcisPrunus dulcist0
- Outcome
- adverse salinity effectse0
- Value
- 0.3 S m-1e0
- Qualifier
- electric conductivity of the nutrient solution (ECn)e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“adverse salinity effects became significant when the electric conductivity of the nutrient solution (ECn) exceeded 0.3 S m-1”
t0“Prunus dulcis”
Claim · model-written summary
Fv/F0 and chlorophyll a content were the most sensitive salt stress indicators.
- Taxon
- P. dulcisPrunus dulcise0
- Outcome
- salt stress indicatorse0
- Qualifier
- Fv/F0 and Chl a contente0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The most sensitive salt stress indicators were Fv/F0 and Chl a content, and they are thus best used for early salt detection in P. dulcis”
t0“Prunus dulcis”
Claim · model-written summary
Monitoring F0 gave a good indication of induced salt stress.
- Taxon
- Prunus dulcisPrunus dulcist0
- Outcome
- indication of induced salt stresse0
- Qualifier
- F0e0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Monitoring of a simple Chl FY, such as F0, also gave a good indication of induced salt stress”
t0“Prunus dulcis”
Claim · model-written summary
Different chlorophyll fluorescence yields and parameters were significantly correlated.
- Taxon
- Prunus dulcisPrunus dulcist0
- Organ / stage
- Chl FYs and FPse0
- Outcome
- correlations observed between the different Chl FYs and FPse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant correlations observed between the different Chl FYs and FPs”
t0“Prunus dulcis”
Claim · model-written summary
Essential chlorophyll fluorescence yields and independent parameters were strongly correlated.
- Taxon
- Prunus dulcisPrunus dulcist0
- Organ / stage
- Chl FPse0
- Outcome
- strongly correlated with each othere0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Even essential Chl FYs, like F0, Fm, F'm, and Fs, and mutually independent Chl FPs, like Fv/F0 and qP, were strongly correlated with each other.”
t0“Prunus dulcis”
The same questions in other papers
salinity · physiology: photosynthesis · Prunus dulcis (almond)Results agree
2 papers in the same direction as this paper
- negative
- negative
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.