Abstract
Salt stress affects crop growth and productivity. In this study, we determined the growth, yield of photosystem II (PSII), and K + and Na + concentration in root, stem, old leaves, and young leaves of two Mexican varieties of rice, Tres Ros and Cotaxtla. In addition, the K + /Na + ratio in stem and root of both varieties was determined. The experiment was conducted in a growth chamber under controlled conditions, under a completely randomized distribution, with a 2 x 2 (Variety x Salinity) factorial arrangement and 12 replications. Plants were grown in a hydroponic solution for 15 days and then some of them were treated with 100 mM NaCl; control plants (without NaCI treatment) were grown in parallel. Salt stress caused 20 and 15% reductions in stem and root length, respectively, in the variety Tres Ros, while in the variety Cotaxtla no significant differences were observed in these variables compared to the control. Dry matter weight decreased by 24% in the variety Tres Ros. The quantum yield of PSII decreased by 30% the third day of treatment application, in both varieties. Na + concentration was significantly (p 0.05) higher in NaCI-treated plants. In the variety Tres Ros, the yield of PSII was completely eradicated six days after treatment implementation, while the K+ concentration in stem and older leaves also decreased and the lowest K + / Na + ratio in stem was recorded, which could indicate that it is more susceptible to salinity than the variety Cotaxtla.
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Claims 10
Claim · model-written summary
Salt reduced Tres Ros stem length by 20%.
- Taxon
- rice plants
Oryza sativat0 - Material
- Tres Rose0
- Treatment
- Salt stresse0
- Outcome
- steme0
- Direction
- reductionse0
- Value
- 20 and 15%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt stress caused 20 and 15% reductions in stem and root length, respectively, in the variety Tres Ros”
t0“rice plants”
Claim · model-written summary
Salt reduced Tres Ros root length by 15%.
- Taxon
- rice plantsOryza sativat0
- Material
- Tres Rose0
- Treatment
- Salt stresse0
- Outcome
- root lengthe0
- Direction
- reductionse0
- Value
- 15%e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salt stress caused 20 and 15% reductions in stem and root length, respectively, in the variety Tres Ros”
t0“rice plants”
e1“Salt stress caused 20 and 15% reductions in stem and root length, respectively, in the variety Tres Ros”
Claim · model-written summary
Cotaxtla stem and root length did not differ significantly from control under salt stress.
- Taxon
- rice plantsOryza sativat0
- Material
- Cotaxtlae0
- Treatment
- Salt stresse1
- Outcome
- stem and root lengthe1
- Direction
- no significant differencese0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the variety Cotaxtla no significant differences were observed in these variables compared to the control”
t0“rice plants”
e1“Salt stress caused 20 and 15% reductions in stem and root length, respectively, in the variety Tres Ros”
Claim · model-written summary
Tres Ros dry matter weight decreased by 24%.
- Taxon
- rice plantsOryza sativat0
- Material
- Tres Rose0
- Treatment
- Salt stresse1
- Outcome
- Dry matter weighte0
- Direction
- decreasede0
- Value
- 24%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dry matter weight decreased by 24% in the variety Tres Ros”
t0“rice plants”
e1“Salt stress caused 20 and 15% reductions in stem and root length, respectively, in the variety Tres Ros”
Claim · model-written summary
PSII quantum yield decreased by 30% on day three in both varieties.
- Taxon
- rice plantsOryza sativat0
- Treatment
- 100 mM NaCle1
- Outcome
- quantum yield of PSIIe0
- Direction
- decreasede0
- Value
- 30%e0
- Qualifier
- third daye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The quantum yield of PSII decreased by 30% the third day of treatment application, in both varieties”
t0“rice plants”
e1“treated with 100 mM NaCl”
Claim · model-written summary
Sodium concentration was significantly higher in NaCl-treated plants.
- Taxon
- rice plantsOryza sativat0
- Treatment
- NaCI-treatede0
- Outcome
- Na + concentratione0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Na + concentration was significantly (p 0.05) higher in NaCI-treated plants”
t0“rice plants”
Claim · model-written summary
Tres Ros PSII yield was eradicated six days after salt treatment.
- Taxon
- rice plantsOryza sativat0
- Material
- Tres Rose0
- Treatment
- 100 mM NaCle1
- Outcome
- yield of PSIIe0
- Direction
- eradicatede0
- Qualifier
- six days after treatment implementatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the variety Tres Ros, the yield of PSII was completely eradicated six days after treatment implementation”
t0“rice plants”
e1“treated with 100 mM NaCl”
Claim · model-written summary
Potassium concentration in Tres Ros stem and older leaves decreased.
- Taxon
- rice plantsOryza sativat0
- Material
- Tres Rose2
- Organ / stage
- stem and older leavese0
- Treatment
- 100 mM NaCle1
- Outcome
- K+ concentratione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the K+ concentration in stem and older leaves also decreased”
e2“In the variety Tres Ros, the yield of PSII was completely eradicated six days after treatment implementation”
t0“rice plants”
e1“treated with 100 mM NaCl”
Claim · model-written summary
Tres Ros had the lowest stem potassium-to-sodium ratio.
- Taxon
- rice plantsOryza sativat0
- Material
- Tres Rose1
- Organ / stage
- steme0
- Outcome
- K + / Na + ratioe0
- Direction
- loweste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the lowest K + / Na + ratio in stem was recorded”
t0“rice plants”
e1“In the variety Tres Ros, the yield of PSII was completely eradicated six days after treatment implementation”
Claim · model-written summary
The authors infer greater salt susceptibility in Tres Ros than Cotaxtla.
- Taxon
- rice plantsOryza sativat0
- Material
- Tres Rose1
- Outcome
- more susceptible to salinitye0
- Direction
- more susceptiblee0
- Comparator
- Cotaxtlae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it is more susceptible to salinity than the variety Cotaxtla”
t0“rice plants”
e1“In the variety Tres Ros, the yield of PSII was completely eradicated six days after treatment implementation”
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