Abstract
Abstract Olive trees ( Olea europaea L.) are considered moderately tolerant to salinity, with clear differences found among cultivars. One‐year‐old self‐rooted olive plants of the Croatian cv. Oblica and Italian cv. Leccino were grown for 90 d in nutrient solutions containing 0, 66, or 166 mM NaCl, respectively. The shoot length and the number of nodes and leaves for both cultivars were not affected by salinity up to 66 mM NaCl. However, at 166 mM NaCl, growth of Leccino was reduced earlier and to a higher extent than growth of Oblica. After 10 d of exposure to 66 and 166 mM NaCl, increased activity of superoxide dismutase (SOD) was observed in Leccino, whereas there was almost no response in Oblica. Reduced SOD activity in Leccino at 166 mM NaCl was observed after prolonged stress (90 d), whereas in Oblica SOD was increased at 66 mM compared to control or 166 mM NaCl. Electrolyte and K + leakage were increased and relative water content decreased as NaCl concentration increased with similar intensity of response measured in both cultivars. Oblica exhibited an ability to keep a higher K + : Na + ratio at all salinity levels compared to Leccino, but since no difference was found in leaf K + concentration, this was mainly achieved by less Na + ions reaching the younger leaves. The antioxidative system represents a component of the complex olive salt‐tolerance mechanism, and it seems that the role of SOD in protection from oxidative stress depends on sodium accumulation in leaves.
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Claims 11
Claim · model-written summary
Shoot length, nodes, and leaves were unaffected up to 66 mM NaCl.
- Taxon
- olive
Olea europaeat0 - Treatment
- salinity up to 66 mM NaCle0
- Outcome
- shoot length and the number of nodes and leavese0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The shoot length and the number of nodes and leaves for both cultivars were not affected by salinity up to 66 mM NaCl”
t0“olive cultivars”
Claim · model-written summary
At 166 mM NaCl Leccino growth was reduced earlier and more than Oblica growth.
- Taxon
- oliveOlea europaeat0
- Material
- Leccinoe0
- Treatment
- 166 mM NaCle0
- Outcome
- growthe0
- Direction
- reducede0
- Comparator
- Oblicae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at 166 mM NaCl, growth of Leccino was reduced earlier and to a higher extent than growth of Oblica”
t0“olive cultivars”
Claim · model-written summary
Leccino SOD activity increased after 10 days at both salt levels.
- Taxon
- oliveOlea europaeat0
- Material
- Leccinoe0
- Treatment
- 66 and 166 mM NaCle0
- Outcome
- activity of superoxide dismutase (SOD)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After 10 d of exposure to 66 and 166 mM NaCl, increased activity of superoxide dismutase (SOD) was observed in Leccino”
t0“olive cultivars”
Claim · model-written summary
Oblica had almost no SOD response after 10 days.
- Taxon
- oliveOlea europaeat0
- Material
- Oblicae0
- Outcome
- responsee0
- Direction
- almost no responsee0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was almost no response in Oblica”
t0“olive cultivars”
Claim · model-written summary
Leccino SOD activity fell after 90 days at 166 mM NaCl.
- Taxon
- oliveOlea europaeat0
- Material
- Leccinoe0
- Treatment
- 166 mM NaCle0
- Outcome
- SOD activitye0
- Direction
- Reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reduced SOD activity in Leccino at 166 mM NaCl was observed after prolonged stress (90 d)”
t0“olive cultivars”
Claim · model-written summary
Oblica SOD activity was higher at 66 mM than control or 166 mM NaCl.
- Taxon
- oliveOlea europaeat0
- Material
- Oblicae0
- Treatment
- 66 mMe0
- Outcome
- SODe0
- Direction
- increasede0
- Comparator
- control or 166 mM NaCle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in Oblica SOD was increased at 66 mM compared to control or 166 mM NaCl”
t0“olive cultivars”
Claim · model-written summary
Electrolyte and K leakage rose with NaCl concentration.
- Taxon
- oliveOlea europaeat0
- Treatment
- NaCle0
- Outcome
- Electrolyte and K + leakagee0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Electrolyte and K + leakage were increased and relative water content decreased as NaCl concentration increased”
t0“olive cultivars”
Claim · model-written summary
Relative water content fell with NaCl concentration.
- Taxon
- oliveOlea europaeat0
- Treatment
- NaCle0
- Outcome
- relative water contente0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“relative water content decreased as NaCl concentration increased”
t0“olive cultivars”
Claim · model-written summary
Oblica maintained a higher K to Na ratio than Leccino.
- Taxon
- oliveOlea europaeat0
- Material
- Oblicae0
- Outcome
- K + : Na + ratioe0
- Direction
- highere0
- Comparator
- Leccinoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oblica exhibited an ability to keep a higher K + : Na + ratio at all salinity levels compared to Leccino”
t0“olive cultivars”
Claim · model-written summary
Leaf K concentration did not differ between cultivars.
- Taxon
- oliveOlea europaeat0
- Outcome
- leaf K + concentratione0
- Direction
- no differencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no difference was found in leaf K + concentration”
t0“olive cultivars”
Claim · model-written summary
Less Na reached Oblica younger leaves.
- Taxon
- oliveOlea europaeat0
- Organ / stage
- younger leavese0
- Outcome
- Na + ions reaching the younger leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this was mainly achieved by less Na + ions reaching the younger leaves”
t0“olive cultivars”
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See all 25 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.