Abstract
Abstract Genetic relationships between salt tolerance and expression of various physiological traits during vegetative growth in tomato, Lycopersicon esculentum Mill., were investigated. Parental, F 1 , F 2 and backcross progeny of a cross between a salt tolerant (PI174263) and a salt sensitive tomato cultivar (‘UCT5’) were evaluated in saline solutions with electrical conductivity of 0.5 (non‐stress) and 20 dS/m (salt stress). Absolute growth, relative growth, tissue ion content, leaf solute potential and the rate of ethylene evolution were measured. Growth of both parents was reduced under salt stress; however, the reduction was significantly less in PI174263 than ‘UCT5’, suggesting greater salt tolerance of the former. Under salt stress, leaves of PI174263 accumulated significantly less Na + and Cl − and more Ca 2+ than leaves of ‘UCT5’. Across parental and progeny generations, growth under salt stress was positively correlated with leaf Ca 2+ content and negatively correlated with leaf Na + content. In contrast, no correlation was observed between growth and either leaf solute potential or the rate of ethylene evolution under salt stress. Generation means analysis indicated that under salt stress both absolute and relative growth and the Na + and Ca 2+ accumulations in the leaf were genetically controlled with additivity being the major genetic component. The results indicated that the inherent genetic capabilities of PI174263 to maintain high tissue Ca 2+ levels and to exclude Na + from the shoot were essential features underlying its adaptation to salt stress and that these features were highly heritable. Thus, tissue ion concentration may be a useful selection criterion when breeding for improved salt tolerance of tomato using progeny derived from PI174263.
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Claims 15
Claim · model-written summary
Salt stress reduced growth of both tomato parents, less in PI174263 than UCT5.
- Taxon
- tomato
Solanum lycopersicumt0 - Material
- PI174263e0
- Treatment
- salt stresse0
- Outcome
- Growthe0
- Direction
- reducede0
- Comparator
- ‘UCT5’e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth of both parents was reduced under salt stress; however, the reduction was significantly less in PI174263 than ‘UCT5’”
t0“tomato”
Claim · model-written summary
Under salt stress PI174263 leaves accumulated less sodium than UCT5.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- PI174263e0
- Organ / stage
- leavese0
- Outcome
- Na +e0
- Direction
- lesse0
- Comparator
- ‘UCT5’e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under salt stress, leaves of PI174263 accumulated significantly less Na + and Cl − and more Ca 2+ than leaves of ‘UCT5’”
t0“tomato”
Claim · model-written summary
Under salt stress PI174263 leaves accumulated less chloride than UCT5.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaves of PI174263 accumulated significantly less Na + and Cl − and more Ca 2+ than leaves of ‘UCT5’”
t0“tomato”
Claim · model-written summary
Under salt stress PI174263 leaves accumulated more calcium than UCT5.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leaves of PI174263 accumulated significantly less Na + and Cl − and more Ca 2+ than leaves of ‘UCT5’”
t0“tomato”
Claim · model-written summary
Growth under salt stress correlated positively with leaf calcium.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- leaf Ca 2+ contente0
- Outcome
- growthe0
- Direction
- positivelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth under salt stress was positively correlated with leaf Ca 2+ content”
t0“tomato”
Claim · model-written summary
Growth under salt stress correlated negatively with leaf sodium.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- leaf Na + contente0
- Outcome
- growthe0
- Direction
- negativelye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth under salt stress was positively correlated with leaf Ca 2+ content and negatively correlated with leaf Na + content”
t0“tomato”
Claim · model-written summary
Growth and leaf solute potential were uncorrelated under salt stress.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- leaf solute potentiale0
- Outcome
- growthe0
- Direction
- no correlatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no correlation was observed between growth and either leaf solute potential or the rate of ethylene evolution under salt stress”
t0“tomato”
Claim · model-written summary
Growth and ethylene evolution rate were uncorrelated under salt stress.
- Taxon
- tomatoSolanum lycopersicumt0
- Organ / stage
- rate of ethylene evolutione0
- Outcome
- growthe0
- Direction
- no correlatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no correlation was observed between growth and either leaf solute potential or the rate of ethylene evolution under salt stress”
t0“tomato”
Claim · model-written summary
Absolute growth under salt stress was mainly genetically controlled by additive effects.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- absolutee0
- Qualifier
- additivity being the major genetic componente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under salt stress both absolute and relative growth and the Na + and Ca 2+ accumulations in the leaf were genetically controlled with additivity being the major genetic component”
t0“tomato”
Claim · model-written summary
Relative growth under salt stress was mainly genetically controlled by additive effects.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- relative growthe0
- Qualifier
- additivity being the major genetic componente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under salt stress both absolute and relative growth and the Na + and Ca 2+ accumulations in the leaf were genetically controlled with additivity being the major genetic component”
t0“tomato”
Claim · model-written summary
Leaf sodium accumulation under salt stress was mainly genetically controlled by additive effects.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- Na +e0
- Qualifier
- additivity being the major genetic componente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Na + and Ca 2+ accumulations in the leaf were genetically controlled with additivity being the major genetic component”
t0“tomato”
Claim · model-written summary
Leaf calcium accumulation under salt stress was mainly genetically controlled by additive effects.
- Taxon
- tomatoSolanum lycopersicumt0
- Outcome
- Ca 2+e0
- Qualifier
- additivity being the major genetic componente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Na + and Ca 2+ accumulations in the leaf were genetically controlled with additivity being the major genetic component”
t0“tomato”
Claim · model-written summary
Maintenance of high tissue calcium was considered essential and heritable for PI174263 salt adaptation.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- PI174263e0
- Outcome
- adaptation to salt stresse0
- Qualifier
- maintain high tissue Ca 2+ levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inherent genetic capabilities of PI174263 to maintain high tissue Ca 2+ levels and to exclude Na + from the shoot were essential features underlying its adaptation to salt stress and that these features were highly heritable”
t0“tomato”
Claim · model-written summary
Sodium exclusion from shoots was considered essential and heritable for PI174263 salt adaptation.
- Taxon
- tomatoSolanum lycopersicumt0
- Material
- PI174263e0
- Outcome
- adaptation to salt stresse0
- Qualifier
- exclude Na + from the shoote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PI174263 to maintain high tissue Ca 2+ levels and to exclude Na + from the shoot were essential features underlying its adaptation to salt stress and that these features were highly heritable”
t0“tomato”
Claim · model-written summary
Tissue ion concentration may be useful for selecting salt-tolerant tomato progeny from PI174263.
- Taxon
- tomatoSolanum lycopersicume0
- Material
- PI174263e0
- Outcome
- tissue ion concentration may be a useful selection criterione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tissue ion concentration may be a useful selection criterion when breeding for improved salt tolerance of tomato using progeny derived from PI174263”
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salinity · growth · Solanum lycopersicum (tomato)Positive and negative results
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