Abstract
Cotton yield is adversely affected by various stresses including salinity. Genetic variation in salt tolerance is often evaluated in potting soil media irrigated with saline solutions but not a field soil. This study evaluated the efficacy of screening four introgressed Upland genotypes from a backcross Gossypium hirsutum L. × G. barbadense L. inbred line population grown in two soils, i.e., an organic farm loam soil or a conventional farm clay soil. The genotypes were treated with NaCl for three wk at concentrations of 0 or 200 mM starting at the second true leaf stage. Chlorophyll content and fluorescence, plant height, leaf length, main stem node number and internode length, shoot biomass, and number of fruiting sites at three, six and nine week intervals (WT) were measured. Significant genotypic variation at three and six WT was observed, suggesting that salt tolerance screening in early cotton establishment is optimal. The salt treatment had negative effects on all growth traits except chlorophyll content and fluorescence. The organic farm loam soil amended with dairy manure had higher pre-treatment salinity content than the conventional farm clay, resulting in greater initial growth suppression at zero WT. However, the manure-amended soil showed less reduction in vegetative and reproductive growth after more prolonged salt treatment, suggesting that more scrutiny may be needed in soils treated with carbon-based fertilizers. The lack of genotype by soil or treatment interactions suggests that soil type had little bearing in screening cotton genotypes for salt tolerance and that control (non-saline) treatments may not be needed for cotton salt tolerance screening. Finally, this pot study demonstrates that three to six weeks of salt treatments after the second true leaf stage is an adequate duration of time to screen for cotton salt tolerance.
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Claims 11
Claim · model-written summary
Cotton genotypes showed significant genetic variation in salt response at three and six weeks.
- Taxon
- Cotton
Gossypium hirsutume0 - Outcome
- genotypic variatione1
- Qualifier
- at three and six WTe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton yield is adversely affected by various stresses including salinity”
e1“Significant genotypic variation at three and six WT was observed”
Claim · model-written summary
Salt tolerance screening in early cotton establishment is optimal.
- Taxon
- cottonGossypium hirsutume2
- Outcome
- salt tolerance screening in early cotton establishmente2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton yield is adversely affected by various stresses including salinity”
e2“suggesting that salt tolerance screening in early cotton establishment is optimal”
Claim · model-written summary
Salt treatment had negative effects on growth traits of cotton.
- Taxon
- CottonGossypium hirsutume0
- Treatment
- salt treatmente3
- Outcome
- growth traitse3
- Direction
- negative effectse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton yield is adversely affected by various stresses including salinity”
e3“The salt treatment had negative effects on all growth traits except chlorophyll content and fluorescence”
Claim · model-written summary
Salt treatment did not reduce chlorophyll content and fluorescence in cotton.
- Taxon
- CottonGossypium hirsutume0
- Treatment
- salt treatmente3
- Outcome
- chlorophyll content and fluorescencee3
- Direction
- no_changeinferrede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton yield is adversely affected by various stresses including salinity”
e3“The salt treatment had negative effects on all growth traits except chlorophyll content and fluorescence”
Claim · model-written summary
Organic loam soil amended with dairy manure had higher pre-treatment salinity content than conventional clay soil.
- Taxon
- CottonGossypium hirsutume0
- Treatment
- dairy manuree4
- Outcome
- pre-treatment salinity contente4
- Direction
- highere4
- Comparator
- conventional farm claye4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton yield is adversely affected by various stresses including salinity”
e4“The organic farm loam soil amended with dairy manure had higher pre-treatment salinity content than the conventional farm clay”
Claim · model-written summary
Manure-amended soil caused greater initial growth suppression of cotton at zero weeks than conventional clay soil.
- Taxon
- CottonGossypium hirsutume0
- Treatment
- dairy manuree4
- Outcome
- initial growth suppression at zero WTe5
- Direction
- greatere5
- Comparator
- conventional farm claye4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton yield is adversely affected by various stresses including salinity”
e4“The organic farm loam soil amended with dairy manure had higher pre-treatment salinity content than the conventional farm clay”
e5“resulting in greater initial growth suppression at zero WT”
Claim · model-written summary
Manure-amended soil showed less reduction in vegetative and reproductive growth of cotton after prolonged salt treatment than conventional clay soil.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- manure-amended soile6
- Outcome
- vegetative and reproductive growthe6
- Direction
- less reductione6
- Qualifier
- after more prolonged salt treatmente6
- Comparator
- conventional farm claye4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton yield is adversely affected by various stresses including salinity”
e4“The organic farm loam soil amended with dairy manure had higher pre-treatment salinity content than the conventional farm clay”
e6“the manure-amended soil showed less reduction in vegetative and reproductive growth after more prolonged salt treatment”
Claim · model-written summary
Genotype by soil or treatment interactions were absent in cotton salt screening.
- Taxon
- CottonGossypium hirsutume0
- Outcome
- genotype by soil or treatment interactionse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton yield is adversely affected by various stresses including salinity”
e7“The lack of genotype by soil or treatment interactions suggests that soil type had little bearing in screening cotton genotypes for salt tolerance”
Claim · model-written summary
Control (non-saline) treatments may not be needed for cotton salt tolerance screening.
- Taxon
- CottonGossypium hirsutume0
- Outcome
- control (non-saline) treatmentse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton yield is adversely affected by various stresses including salinity”
e1“control (non-saline) treatments may not be needed for cotton salt tolerance screening”
Claim · model-written summary
Soil type had little bearing on screening cotton genotypes for salt tolerance.
- Taxon
- cottonGossypium hirsutume7
- Outcome
- little bearing in screening cotton genotypes for salt tolerancee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“The lack of genotype by soil or treatment interactions suggests that soil type had little bearing in screening cotton genotypes for salt tolerance”
Claim · model-written summary
Three to six weeks of salt treatment after the second true leaf stage is an adequate duration to screen cotton for salt tolerance.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- three to six weeks of salt treatments after the second true leaf stagee0
- Outcome
- adequate duration of time to screen for cotton salt tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“three to six weeks of salt treatments after the second true leaf stage is an adequate duration of time to screen for cotton salt tolerance”
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