Abstract
The potential of utilizing induction and quenching kinetics of chlorophyll a fluorescence as consistent and reliable markers for in vivo salt (sodium sulphate) tolerance screening studies was investigated by comparing two wheat (Triticum aestivum L.) varieties with varying responses to salinity, viz. Kharchia-65 (salt-tolerant) and Fielder (salt-susceptible). Three-week-old seedlings were treated with a range of salt concentrations (0 to 2%) over a 1- to 2-week period. Both the maximum rates of fluorescence induction and quenching measured from leaf sections decreased significantly in Fielder compared with Kharchia-65 as the salt concentration increased. Alterations in other fluorescence parameters, such as the maximum yield of fluorescence signal in the absence and presence of 3(3,4-dichlorophenyl)-1,1-dimethylurea by the variety Fielder indicated a minimal reduction in the size of the primary electron acceptor pool associated with photosystem II following salt stress. In contrast, these parameters were altered to a lesser extent by salt treatments in Kharchia-65. The effect of salinity stress on leaf morphology of both varieties indicated no major anatomical alterations apart from a negligible increase in leaf thickness. Total chlorophyll content of Kharchia-65 increased significantly as a result of salt stress, owing to an increase in both chlorophyll a and chlorophyll b, whereas Fielder showed no significant variations. The results indicate that total fluorescence quenching and maximum rates of both induction and quenching appear to be reliable indicators for in vivo screening of salt-tolerant wheat genotypes. Key words: Triticum aestivum L., wheat, chlorophyll a fluorescence, salt stress, in vivo screening.
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Claims 9
Claim · model-written summary
Fluorescence induction and quenching rates declined more in Fielder than Kharchia-65 with rising salt.
- Taxon
- wheat
Triticum aestivume1 - Material
- Fieldere0
- Treatment
- salt concentratione0
- Outcome
- maximum rates of fluorescence induction and quenchinge0
- Direction
- decreasede0
- Comparator
- Kharchia-65e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both the maximum rates of fluorescence induction and quenching measured from leaf sections decreased significantly in Fielder compared with Kharchia-65 as the salt concentration increased.”
e1“two wheat (Triticum aestivum L.) varieties”
Claim · model-written summary
Fielder showed a minimal reduction in primary electron acceptor pool size after salt stress.
- Taxon
- wheatTriticum aestivume1
- Material
- Fieldere0
- Treatment
- salt stresse0
- Outcome
- size of the primary electron acceptor poole0
- Direction
- reductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the variety Fielder indicated a minimal reduction in the size of the primary electron acceptor pool associated with photosystem II following salt stress.”
e1“two wheat (Triticum aestivum L.) varieties”
Claim · model-written summary
Fluorescence parameters changed less with salt in Kharchia-65.
- Taxon
- wheatTriticum aestivume1
- Material
- Kharchia-65e0
- Treatment
- salt treatmentse0
- Outcome
- these parameterse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“these parameters were altered to a lesser extent by salt treatments in Kharchia-65.”
e1“two wheat (Triticum aestivum L.) varieties”
Claim · model-written summary
Salt stress caused no major leaf anatomical alterations in either variety.
- Taxon
- wheatTriticum aestivume1
- Treatment
- salinity stresse0
- Outcome
- leaf morphologye0
- Direction
- no major anatomical alterationse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salinity stress on leaf morphology of both varieties indicated no major anatomical alterations apart from a negligible increase in leaf thickness.”
e1“two wheat (Triticum aestivum L.) varieties”
Claim · model-written summary
Leaf thickness increased negligibly under salinity stress.
- Taxon
- wheatTriticum aestivume1
- Treatment
- salinity stresse0
- Outcome
- leaf thicknesse0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salinity stress on leaf morphology of both varieties indicated no major anatomical alterations apart from a negligible increase in leaf thickness.”
e1“two wheat (Triticum aestivum L.) varieties”
Claim · model-written summary
Salt stress significantly increased total chlorophyll in Kharchia-65.
- Taxon
- wheatTriticum aestivume1
- Material
- Kharchia-65e0
- Treatment
- salt stresse0
- Outcome
- Total chlorophyll contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total chlorophyll content of Kharchia-65 increased significantly as a result of salt stress”
e1“two wheat (Triticum aestivum L.) varieties”
Claim · model-written summary
Chlorophyll a and b increased in salt-stressed Kharchia-65.
- Taxon
- wheatTriticum aestivume1
- Outcome
- chlorophyll a and chlorophyll be0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“owing to an increase in both chlorophyll a and chlorophyll b”
e1“two wheat (Triticum aestivum L.) varieties”
Claim · model-written summary
Fielder chlorophyll did not vary significantly.
- Taxon
- wheatTriticum aestivume1
- Material
- Fieldere0
- Outcome
- no significant variationse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whereas Fielder showed no significant variations.”
e1“two wheat (Triticum aestivum L.) varieties”
Claim · model-written summary
Fluorescence quenching and maximum induction and quenching rates appear reliable for screening salt tolerant wheat genotypes.
- Taxon
- wheatTriticum aestivume0
- Outcome
- reliable indicators for in vivo screening of salt-tolerant wheat genotypese0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total fluorescence quenching and maximum rates of both induction and quenching appear to be reliable indicators for in vivo screening of salt-tolerant wheat genotypes.”
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See all 377 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.