Abstract
SummaryMorphological and physiological traits known to be involved in plant resistance to water deficit were studied in leaves of two olive (Olea europaea L.) cultivars, ‘Meski’ and ‘Chemlali’, reputed to be drought-sensitive and drought-tolerant, respectively. The objective of this study was to compare defense mechanisms against water stress in the leaves of these two cultivars. Withholding irrigation decreased the relative water content (RWC), net photosynthesis rate and stomatal conductance in leaves of both cultivars. This decrease was more acute in ‘Meski’ than in ‘Chemlali’. The former cultivar was, therefore, more sensitive to water deficit. ‘Chemlali’ had higher leaf trichome and stomatal densities. However, when leaves of both cultivars were kept in the dark, the desiccation curves were comparable, implying that the two varieties had similar leaf cuticle transpiration. Under acute water deficit, leaves of both cultivars accumulated soluble sugars and proline, possibly for osmotic adjustment. The levels of RWC at which soluble sugar concentrations started to increase and decline were the same for both cultivars; nevertheless, ‘Meski’ leaves accumulated more soluble sugars. Detached leaves of ‘Chemlali’ had lower soluble sugar and higher proline concentrations than attached leaves. It is possible that soluble sugars were diverted to proline synthesis in response to injury. The RWC levels at which proline accumulation started and ended differed between the two cultivars, being higher in ‘Meski’ than in ‘Chemlali’. In our study, high leaf trichome and stomatal densities and effective osmotic adjustment with proline may explain the greater drought-tolerance of cultivar ‘Chemlali’ compared with cultivar ‘Meski’.
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Claims 12
Claim · model-written summary
Withholding irrigation decreased relative water content, net photosynthesis rate and stomatal conductance in leaves of both olive cultivars.
- Taxon
- olive (Olea europaea L.)
Olea europaeae0 - Material
- ‘Meski’ and ‘Chemlali’e0
- Organ / stage
- leavese1
- Treatment
- Withholding irrigatione1
- Outcome
- relative water content (RWC), net photosynthesis rate and stomatal conductancee1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“studied in leaves of two olive (Olea europaea L.) cultivars, ‘Meski’ and ‘Chemlali’”
e1“Withholding irrigation decreased the relative water content (RWC), net photosynthesis rate and stomatal conductance in leaves of both cultivars”
Claim · model-written summary
Under withholding irrigation, the decrease in relative water content, net photosynthesis and stomatal conductance was more acute in ‘Meski’ than in ‘Chemlali’.
- Taxon
- olive (Olea europaea L.)Olea europaeae0
- Material
- Meskie2
- Treatment
- Withholding irrigatione1
- Outcome
- relative water content (RWC), net photosynthesis rate and stomatal conductancee1
- Direction
- more acutee2
- Comparator
- Chemlalie2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“studied in leaves of two olive (Olea europaea L.) cultivars, ‘Meski’ and ‘Chemlali’”
e1“Withholding irrigation decreased the relative water content (RWC), net photosynthesis rate and stomatal conductance in leaves of both cultivars”
e2“This decrease was more acute in ‘Meski’ than in ‘Chemlali’”
Claim · model-written summary
Chemlali had higher leaf trichome and stomatal densities.
- Taxon
- olive (Olea europaea L.)Olea europaeae0
- Material
- Chemlalie4
- Organ / stage
- leafe4
- Outcome
- leaf trichome and stomatal densitiese4
- Direction
- highere4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“studied in leaves of two olive (Olea europaea L.) cultivars, ‘Meski’ and ‘Chemlali’”
e4“‘Chemlali’ had higher leaf trichome and stomatal densities”
Claim · model-written summary
Leaves of both olive cultivars kept in the dark had similar leaf cuticle transpiration, as shown by comparable desiccation curves.
- Taxon
- olive (Olea europaea L.)Olea europaeae0
- Organ / stage
- leavese5
- Treatment
- kept in the darke5
- Outcome
- leaf cuticle transpiratione5
- Direction
- similare5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“studied in leaves of two olive (Olea europaea L.) cultivars, ‘Meski’ and ‘Chemlali’”
e5“when leaves of both cultivars were kept in the dark, the desiccation curves were comparable, implying that the two varieties had similar leaf cuticle transpiration”
Claim · model-written summary
Under acute water deficit, leaves of both olive cultivars accumulated soluble sugars and proline, possibly for osmotic adjustment.
- Taxon
- olive (Olea europaea L.)Olea europaeae0
- Organ / stage
- leavese6
- Treatment
- acute water deficite6
- Outcome
- soluble sugars and prolinee6
- Direction
- accumulatede6
- Qualifier
- possibly for osmotic adjustmente6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“studied in leaves of two olive (Olea europaea L.) cultivars, ‘Meski’ and ‘Chemlali’”
e6“Under acute water deficit, leaves of both cultivars accumulated soluble sugars and proline, possibly for osmotic adjustment”
Claim · model-written summary
The RWC levels at which soluble sugar concentrations started to increase and decline were the same for both olive cultivars.
- Taxon
- olive (Olea europaea L.)Olea europaeae0
- Material
- ‘Meski’ and ‘Chemlali’e0
- Outcome
- levels of RWC at which soluble sugar concentrations started to increase and declinee7
- Direction
- the samee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“studied in leaves of two olive (Olea europaea L.) cultivars, ‘Meski’ and ‘Chemlali’”
e7“The levels of RWC at which soluble sugar concentrations started to increase and decline were the same for both cultivars”
Claim · model-written summary
‘Meski’ leaves accumulated more soluble sugars.
- Taxon
- olive (Olea europaea L.)Olea europaeae0
- Material
- Meskie3
- Organ / stage
- leavese3
- Outcome
- soluble sugarse3
- Direction
- accumulated moree3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“studied in leaves of two olive (Olea europaea L.) cultivars, ‘Meski’ and ‘Chemlali’”
e3“‘Meski’ leaves accumulated more soluble sugars”
Claim · model-written summary
Detached leaves of Chemlali had lower soluble sugar concentrations than attached leaves.
- Taxon
- olive (Olea europaea L.)Olea europaeae0
- Material
- Chemlalie1
- Treatment
- Detached leavese1
- Outcome
- soluble sugare1
- Direction
- lowere1
- Comparator
- attached leavese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“studied in leaves of two olive (Olea europaea L.) cultivars, ‘Meski’ and ‘Chemlali’”
e1“Detached leaves of ‘Chemlali’ had lower soluble sugar and higher proline concentrations than attached leaves”
Claim · model-written summary
Detached leaves of Chemlali had higher proline concentrations than attached leaves.
- Taxon
- olive (Olea europaea L.)Olea europaeae0
- Material
- Chemlalie1
- Treatment
- Detached leavese1
- Outcome
- proline concentrationse1
- Direction
- highere1
- Comparator
- attached leavese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“studied in leaves of two olive (Olea europaea L.) cultivars, ‘Meski’ and ‘Chemlali’”
e1“Detached leaves of ‘Chemlali’ had lower soluble sugar and higher proline concentrations than attached leaves”
Claim · model-written summary
Soluble sugars may have been diverted to proline synthesis in response to injury.
- Taxon
- olive (Olea europaea L.)Olea europaeae0
- Compound
- soluble sugarse1
- Outcome
- proline synthesise1
- Qualifier
- in response to injurye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“studied in leaves of two olive (Olea europaea L.) cultivars, ‘Meski’ and ‘Chemlali’”
e1“It is possible that soluble sugars were diverted to proline synthesis in response to injury”
Claim · model-written summary
The RWC levels at which proline accumulation started and ended differed between the two olive cultivars, being higher in Meski than in Chemlali.
- Taxon
- olive (Olea europaea L.)Olea europaeae0
- Material
- Meskie1
- Outcome
- RWC levels at which proline accumulation started and endede1
- Direction
- highere1
- Comparator
- Chemlalie1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“studied in leaves of two olive (Olea europaea L.) cultivars, ‘Meski’ and ‘Chemlali’”
e1“The RWC levels at which proline accumulation started and ended differed between the two cultivars, being higher in ‘Meski’ than in ‘Chemlali’”
Claim · model-written summary
High leaf trichome and stomatal densities and effective osmotic adjustment with proline may explain the greater drought tolerance of Chemlali compared with Meski.
- Taxon
- olive (Olea europaea L.)Olea europaeae0
- Material
- Chemlalie1
- Compound
- prolinee1
- Outcome
- greater drought-tolerancee1
- Qualifier
- high leaf trichome and stomatal densities and effective osmotic adjustment with prolinee1
- Comparator
- Meskie1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“studied in leaves of two olive (Olea europaea L.) cultivars, ‘Meski’ and ‘Chemlali’”
e1“high leaf trichome and stomatal densities and effective osmotic adjustment with proline may explain the greater drought-tolerance of cultivar ‘Chemlali’ compared with cultivar ‘Meski’”
The same questions in other papers
drought · physiology: osmolytes · Olea europaea (common olive)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
irrigation · physiology: water · Olea europaea (common olive)Positive and negative results
7 papers in the same direction as this paper · 9 in the opposite direction
- positive
- negative
- positive
13 papers more in this group
See all 17 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.