Abstract
SUMMARY Our knowledge of melon ( Cucumis melo L.) response to salinity stress is limited under field conditions and then the genotype × environment interaction and heritability of agro-morphological traits are poor understood. A field trial (2014/2015) was carried out to evaluate the performance of 17 melon cultivars, including 16 native and one exotic (Galia), under salinity stress. Leaf ion concentrations, agronomic, morphological and fruit quality traits were evaluated and their heritabilities were estimated. The results showed significant effects of salinity stress and genotype on the studied traits except for days to anthesis and peel thickness. Salinity stress also caused significant reductions in fruit weight and leaf K + concentration, while increasing leaf Na + and Ca 2+ concentrations and total soluble solids. The most salt-tolerant cultivars (‘Sabouni’ and ‘Shahabadi-1’) had higher fruit yield, low leaf Na + and high leaf K + concentrations and enhanced K + /Na + ratio under stress conditions. In general, the heritability estimates were higher under control than under salinity conditions, and the highest heritability was observed for total soluble solids. In addition, fruit weight, number of fruit per plant and leaf Na + concentration were the strongest predictors of fruit yield, explaining 92% of yield variation under salt stress. These observations suggest that indirect selection based on these traits would be effective in improving fruit production under saline conditions.
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Claims 13
Claim · model-written summary
Salinity and genotype significantly affected studied traits except days to anthesis and peel thickness.
- Taxon
- melon
.jpg?width=60)
Cucumis meloe1 - Treatment
- salinity stresse0
- Outcome
- studied traitse0
- Qualifier
- except for days to anthesis and peel thicknesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“significant effects of salinity stress and genotype on the studied traits except for days to anthesis and peel thickness”
e1“melon ( Cucumis melo L.)”
Claim · model-written summary
Salinity reduced fruit weight.
- Taxon
- melonCucumis meloe1
- Treatment
- Salinity stresse0
- Outcome
- fruit weighte0
- Direction
- reductionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity stress also caused significant reductions in fruit weight and leaf K + concentration”
e1“melon ( Cucumis melo L.)”
Claim · model-written summary
Salinity reduced leaf potassium concentration.
- Taxon
- melonCucumis meloe1
- Treatment
- Salinity stresse0
- Outcome
- leaf K + concentratione0
- Direction
- reductionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity stress also caused significant reductions in fruit weight and leaf K + concentration”
e1“melon ( Cucumis melo L.)”
Claim · model-written summary
Salinity increased leaf sodium concentration.
- Taxon
- melonCucumis meloe2
- Treatment
- Salinity stresse1
- Outcome
- leaf Na +e0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while increasing leaf Na + and Ca 2+ concentrations and total soluble solids”
e1“Salinity stress also caused significant reductions”
e2“melon ( Cucumis melo L.)”
Claim · model-written summary
Salinity increased leaf calcium concentration.
- Taxon
- melonCucumis meloe2
- Treatment
- Salinity stresse1
- Outcome
- Ca 2+ concentrationse0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while increasing leaf Na + and Ca 2+ concentrations and total soluble solids”
e1“Salinity stress also caused significant reductions”
e2“melon ( Cucumis melo L.)”
Claim · model-written summary
Salinity increased total soluble solids.
- Taxon
- melonCucumis meloe2
- Treatment
- Salinity stresse1
- Outcome
- total soluble solidse0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while increasing leaf Na + and Ca 2+ concentrations and total soluble solids”
e1“Salinity stress also caused significant reductions”
e2“melon ( Cucumis melo L.)”
Claim · model-written summary
Sabouni had higher fruit yield under salinity.
- Taxon
- melonCucumis meloe1
- Material
- Sabounie0
- Treatment
- stress conditionse0
- Outcome
- fruit yielde0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The most salt-tolerant cultivars (‘Sabouni’ and ‘Shahabadi-1’) had higher fruit yield, low leaf Na + and high leaf K + concentrations and enhanced K + /Na + ratio under stress conditions”
e1“melon ( Cucumis melo L.)”
Claim · model-written summary
Shahabadi-1 had higher fruit yield under salinity.
- Taxon
- melonCucumis meloe1
- Material
- Shahabadi-1e0
- Treatment
- stress conditionse0
- Outcome
- fruit yielde0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The most salt-tolerant cultivars (‘Sabouni’ and ‘Shahabadi-1’) had higher fruit yield, low leaf Na + and high leaf K + concentrations and enhanced K + /Na + ratio under stress conditions”
e1“melon ( Cucumis melo L.)”
Claim · model-written summary
The two salt-tolerant cultivars had low leaf sodium and high potassium concentrations and an enhanced potassium to sodium ratio under stress.
- Taxon
- melonCucumis meloe1
- Treatment
- stress conditionse0
- Outcome
- low leaf Na + and high leaf K + concentrations and enhanced K + /Na + ratioe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The most salt-tolerant cultivars (‘Sabouni’ and ‘Shahabadi-1’) had higher fruit yield, low leaf Na + and high leaf K + concentrations and enhanced K + /Na + ratio under stress conditions”
e1“melon ( Cucumis melo L.)”
Claim · model-written summary
Heritability estimates were generally higher under control conditions than salinity.
- Taxon
- melonCucumis meloe1
- Outcome
- heritability estimatese0
- Direction
- highere0
- Comparator
- under salinity conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the heritability estimates were higher under control than under salinity conditions”
e1“melon ( Cucumis melo L.)”
Claim · model-written summary
Total soluble solids showed the highest heritability.
- Taxon
- melonCucumis meloe1
- Outcome
- heritabilitye0
- Direction
- higheste0
- Qualifier
- total soluble solidse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the highest heritability was observed for total soluble solids”
e1“melon ( Cucumis melo L.)”
Claim · model-written summary
Fruit weight, fruit number per plant and leaf sodium concentration predicted fruit yield, explaining 92% of its variation under salt stress.
- Taxon
- melonCucumis meloe1
- Organ / stage
- fruite0
- Outcome
- fruit yielde0
- Value
- 92%e0
- Qualifier
- fruit weight, number of fruit per plant and leaf Na + concentratione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fruit weight, number of fruit per plant and leaf Na + concentration were the strongest predictors of fruit yield, explaining 92% of yield variation under salt stress”
e1“melon ( Cucumis melo L.)”
Claim · model-written summary
The authors suggest indirect selection using fruit weight, fruit number and leaf sodium to improve fruit production under salinity.
- Taxon
- melonCucumis meloe2
- Outcome
- indirect selection based on these traitse0
- Qualifier
- fruit weight, number of fruit per plant and leaf Na + concentratione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“indirect selection based on these traits would be effective in improving fruit production under saline conditions”
e1“fruit weight, number of fruit per plant and leaf Na + concentration”
e2“melon ( Cucumis melo L.)”
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