Abstract
The area of farming lands affected by increasing soil salinity is growing significantly worldwide. For this reason, breeding works are conducted to improve the salinity tolerance of important crop species. The goal of the present study was to indicate physiological or biochemical parameters characterizing three durum wheat accessions with various tolerance to salinity. The study was carried out on germinating seeds and mature plants of a Polish SMH87 line, an Australian cultivar ‘Tamaroi’ (salt-sensitive), and the BC5Nax2 line (salt-tolerant) exposed to 0–150 mM NaCl. Germination parameters, electrolyte leakage (EL), and salt susceptibility index were determined in the germinating caryopses, whereas photosynthetic parameters, carbohydrate and phenolic content, antioxidant activity as well as yield were measured in fully developed plants. The parameters that most differentiated the examined accessions in the germination phase were the percentage of germinating seeds (PGS) and germination vigor (Vi). In the fully developed plants, parameters included whether the plants had the maximum efficiency of the water-splitting reaction on the donor side of photosystem II (PSII)–Fv/F0, energy dissipation from PSII–DIo/CSm, and the content of photosynthetic pigments and hydrogen peroxide, which differentiated studied genotypes in terms of salinity tolerance degree. Salinity has a negative impact on grain yield by reducing the number of seeds per spike and the mass of one thousand seeds (MTS), which can be used as the most suitable parameter for determining tolerance to salinity stress. The most salt-tolerant BC5Nax2 line was characterized by the highest PGS, and Vi for NaCl concentration of 100–150 mM, content of chlorophyll a, b, carotenoids, and also MTS at all applied salt concentrations as compared with the other accessions. The most salt-sensitive cv. ‘Tamaroi’ demonstrated higher H2O2 concentration which proves considerable oxidative damage caused by salinity stress. Mentioned parameters can be helpful for breeders in the selection of genotypes the most resistant to this stress.
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Claims 9
Claim · model-written summary
Germination percentage and vigor most differentiated the accessions during germination.
- Taxon
- Durum Wheat
Triticum turgidum subsp. durumt0 - Outcome
- percentage of germinating seeds (PGS) and germination vigor (Vi)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The parameters that most differentiated the examined accessions in the germination phase were the percentage of germinating seeds (PGS) and germination vigor (Vi)”
t0“Durum Wheat”
Claim · model-written summary
Photosystem II parameters, pigments and hydrogen peroxide content differentiated mature genotypes by salinity tolerance.
- Taxon
- Durum WheatTriticum turgidum subsp. durumt0
- Outcome
- salinity tolerance degreee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the maximum efficiency of the water-splitting reaction on the donor side of photosystem II (PSII)–Fv/F0, energy dissipation from PSII–DIo/CSm, and the content of photosynthetic pigments and hydrogen peroxide, which differentiated studied genotypes in terms of salinity tolerance degree”
t0“Durum Wheat”
Claim · model-written summary
Salinity reduced wheat grain yield.
- Taxon
- Durum WheatTriticum turgidum subsp. durumt0
- Treatment
- Salinitye0
- Outcome
- grain yielde0
- Direction
- negativee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity has a negative impact on grain yield by reducing the number of seeds per spike and the mass of one thousand seeds (MTS)”
t0“Durum Wheat”
Claim · model-written summary
Salinity reduced seeds per spike.
- Taxon
- Durum WheatTriticum turgidum subsp. durumt0
- Treatment
- Salinitye0
- Outcome
- number of seeds per spikee0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity has a negative impact on grain yield by reducing the number of seeds per spike and the mass of one thousand seeds (MTS)”
t0“Durum Wheat”
Claim · model-written summary
Salinity reduced thousand-seed mass.
- Taxon
- Durum WheatTriticum turgidum subsp. durumt0
- Treatment
- Salinitye0
- Outcome
- mass of one thousand seeds (MTS)e0
- Direction
- reducinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity has a negative impact on grain yield by reducing the number of seeds per spike and the mass of one thousand seeds (MTS)”
t0“Durum Wheat”
Claim · model-written summary
BC5Nax2 had the highest germination percentage and vigor at 100–150 mM NaCl.
- Taxon
- Durum WheatTriticum turgidum subsp. durumt0
- Material
- BC5Nax2e0
- Treatment
- NaCl concentration of 100–150 mMe0
- Outcome
- PGS, and Vie0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The most salt-tolerant BC5Nax2 line was characterized by the highest PGS, and Vi for NaCl concentration of 100–150 mM”
t0“Durum Wheat”
Claim · model-written summary
BC5Nax2 had the highest chlorophyll a, chlorophyll b and carotenoid contents.
- Taxon
- Durum WheatTriticum turgidum subsp. durumt0
- Material
- BC5Nax2e0
- Outcome
- content of chlorophyll a, b, carotenoidse0
- Direction
- higheste0
- Comparator
- other accessionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The most salt-tolerant BC5Nax2 line was characterized by the highest PGS, and Vi for NaCl concentration of 100–150 mM, content of chlorophyll a, b, carotenoids, and also MTS at all applied salt concentrations as compared with the other accessions”
t0“Durum Wheat”
Claim · model-written summary
BC5Nax2 had the highest thousand-seed mass at all applied salt concentrations.
- Taxon
- Durum WheatTriticum turgidum subsp. durumt0
- Material
- BC5Nax2e0
- Outcome
- MTSe0
- Direction
- higheste0
- Comparator
- other accessionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The most salt-tolerant BC5Nax2 line was characterized by the highest PGS, and Vi for NaCl concentration of 100–150 mM, content of chlorophyll a, b, carotenoids, and also MTS at all applied salt concentrations as compared with the other accessions”
t0“Durum Wheat”
Claim · model-written summary
Salt-sensitive Tamaroi had higher hydrogen peroxide concentration.
- Taxon
- Durum WheatTriticum turgidum subsp. durumt0
- Material
- ‘Tamaroi’e0
- Outcome
- H2O2 concentratione0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The most salt-sensitive cv. ‘Tamaroi’ demonstrated higher H2O2 concentration”
t0“Durum Wheat”
The same questions in other papers
salinity · yield · Triticum turgidum (rivet wheat)Results differ
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- no effect
- negative
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See all 12 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.