Abstract
We studied water relations and gas exchange in six almond genotypes grafted on GF677 in response to withholding irrigation for 14 days and a subsequent 10-day rehydration period. The responses to drought stress significantly differed in the almond genotypes; the tolerant plants were distinguished and monitored. Leaf relative water content (RWC) decreased by more than 23%, leaf water potential dropped to less than -4.3 MPa, and electrolyte leakage increased to 43% in dehydration-sensitive genotypes. Photosynthesis (P N) and stomatal conductance (g s) of drought-sensitive genotypes were significantly reduced by 70% and 97% in response to water deficiency. Water stress significantly enhanced wateruse efficiency up to 10 folds in drought-tolerant almonds. The difference between leaf temperature and its surrounding air temperature (ΔT) increased significantly to more than 187% under water stress in drought-tolerant genotypes. In addition, the reduction in the g s and further ability to preserve RWC were involved probably in drought-tolerance mechanism in almond. Negative significant correlations were found between ΔT, P N, and g s. Based on the correlations, we suggested that ΔT could be used as a simple measurement for monitoring water stress development in the irrigation management of almond orchards. In conclusion, 'Supernova' and the Iranian genotypes '6-8' and 'B-124', were found to be more droughttolerant compared with other genotypes in this experiment.
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Claims 11
Claim · model-written summary
Withholding irrigation decreased leaf relative water content by more than 23% in dehydration-sensitive almond genotypes.
- Taxon
- almond
Prunus dulcist0 - Material
- dehydration-sensitive genotypese2
- Treatment
- withholding irrigation for 14 dayse1
- Outcome
- Leaf relative water content (RWC)e2
- Direction
- decreasede2
- Value
- more than 23%e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Gas-exchange response of almond genotypes”
e1“in response to withholding irrigation for 14 days”
e2“Leaf relative water content (RWC) decreased by more than 23%, leaf water potential dropped to less than -4.3 MPa, and electrolyte leakage increased to 43% in dehydration-sensitive genotypes”
Claim · model-written summary
Withholding irrigation dropped leaf water potential to less than -4.3 MPa in dehydration-sensitive almond genotypes.
- Taxon
- almondPrunus dulcist0
- Material
- dehydration-sensitive genotypese2
- Treatment
- withholding irrigation for 14 dayse1
- Outcome
- leaf water potentiale2
- Direction
- droppede2
- Value
- less than -4.3 MPae2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Gas-exchange response of almond genotypes”
e1“in response to withholding irrigation for 14 days”
e2“Leaf relative water content (RWC) decreased by more than 23%, leaf water potential dropped to less than -4.3 MPa, and electrolyte leakage increased to 43% in dehydration-sensitive genotypes”
Claim · model-written summary
Withholding irrigation increased electrolyte leakage to 43% in dehydration-sensitive almond genotypes.
- Taxon
- almondPrunus dulcist0
- Material
- dehydration-sensitive genotypese2
- Treatment
- withholding irrigation for 14 dayse1
- Outcome
- electrolyte leakagee2
- Direction
- increasede2
- Value
- 43%e2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Gas-exchange response of almond genotypes”
e1“in response to withholding irrigation for 14 days”
e2“electrolyte leakage increased to 43% in dehydration-sensitive genotypes”
Claim · model-written summary
Water deficiency significantly reduced photosynthesis (P N) by 70% in drought-sensitive almond genotypes.
- Taxon
- almondPrunus dulcist0
- Material
- drought-sensitive genotypese3
- Treatment
- water deficiencye3
- Outcome
- Photosynthesis (P N)e3
- Direction
- reducede3
- Value
- 70%e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Gas-exchange response of almond genotypes”
e3“Photosynthesis (P N) and stomatal conductance (g s) of drought-sensitive genotypes were significantly reduced by 70% and 97% in response to water deficiency”
Claim · model-written summary
Water deficiency significantly reduced stomatal conductance (g s) by 97% in drought-sensitive almond genotypes.
- Taxon
- almondPrunus dulcist0
- Material
- drought-sensitive genotypese3
- Treatment
- water deficiencye3
- Outcome
- stomatal conductance (g s)e3
- Direction
- reducede3
- Value
- 97%e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Gas-exchange response of almond genotypes”
e3“Photosynthesis (P N) and stomatal conductance (g s) of drought-sensitive genotypes were significantly reduced by 70% and 97% in response to water deficiency”
Claim · model-written summary
Water stress significantly enhanced water-use efficiency by up to 10 folds in drought-tolerant almond genotypes.
- Taxon
- almondPrunus dulcist0
- Material
- drought-tolerant almondse4
- Treatment
- Water stresse4
- Outcome
- wateruse efficiencye4
- Direction
- enhancede4
- Value
- up to 10 foldse4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Gas-exchange response of almond genotypes”
e4“Water stress significantly enhanced wateruse efficiency up to 10 folds in drought-tolerant almonds”
Claim · model-written summary
Water stress significantly increased the difference between leaf and air temperature (ΔT) to more than 187% in drought-tolerant almond genotypes.
- Taxon
- almondPrunus dulcist0
- Material
- drought-tolerant genotypese5
- Treatment
- water stresse5
- Outcome
- difference between leaf temperature and its surrounding air temperature (ΔT)e5
- Direction
- increasede5
- Value
- more than 187%e5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Gas-exchange response of almond genotypes”
e5“The difference between leaf temperature and its surrounding air temperature (ΔT) increased significantly to more than 187% under water stress in drought-tolerant genotypes”
Claim · model-written summary
Reduced stomatal conductance and a further ability to preserve relative water content probably underlie drought tolerance in almond.
- Taxon
- almondPrunus dulcist0
- Outcome
- drought-tolerance mechanisme6
- Qualifier
- the reduction in the g s and further ability to preserve RWCe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Gas-exchange response of almond genotypes”
e6“In addition, the reduction in the g s and further ability to preserve RWC were involved probably in drought-tolerance mechanism in almond”
Claim · model-written summary
Negative significant correlations were found between ΔT, photosynthesis (P N) and stomatal conductance (g s) in almond.
- Taxon
- almondPrunus dulcist0
- Outcome
- correlationse7
- Direction
- Negativee7
- Qualifier
- between ΔT, P N, and g se7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Gas-exchange response of almond genotypes”
e7“Negative significant correlations were found between ΔT, P N, and g s”
Claim · model-written summary
ΔT could be used as a simple measurement for monitoring water stress development in almond irrigation management.
- Taxon
- almondPrunus dulcist0
- Outcome
- a simple measurement for monitoring water stress developmente1
- Setting
- almond orchardse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Gas-exchange response of almond genotypes”
e1“we suggested that ΔT could be used as a simple measurement for monitoring water stress development in the irrigation management of almond orchards”
Claim · model-written summary
The almond genotypes Supernova and 6-8 and B-124 were more drought-tolerant than other genotypes in this experiment.
- Taxon
- almondPrunus dulcist0
- Material
- '6-8' and 'B-124'e1
- Outcome
- droughttolerante1
- Direction
- moree1
- Comparator
- other genotypese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Gas-exchange response of almond genotypes”
e1“'Supernova' and the Iranian genotypes '6-8' and 'B-124', were found to be more droughttolerant compared with other genotypes”
The same questions in other papers
irrigation · physiology: water · Prunus dulcis (almond)Positive and negative results
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- positive
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See all 10 papers →drought · physiology: gas exchange · Prunus dulcis (almond)Results agree
2 papers in the same direction as this paper
- negative
- negative
drought · physiology: photosynthesis · Prunus dulcis (almond)Results agree
4 papers in the same direction as this paper
- negative
- negative
- negative
1 paper more in this group
See all 5 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.