Abstract
We studied the effect of a 200-mg·liter –1 foliar application of paclobutrazol (PBZ) on growth and physiological responses of Prunus persica `Nemaguard' (salt-sensitive) and Olea europea `Manzanillo' (salt-tolerant) to salt stress. One-year-old trees were grown in 3 sand: 3 field soil: 4 pine bark media in 20-cm pots in a greenhouse and were irrigated with nutrient solutions adjusted with 0, 9, 18, or 36 mmol NaCl for peach and 0, 36, 72, 108 mmol NaCI for olive. Dry weight, photosynthesis, and leaf conductance decreased with increasing salinity for both species. However, leaf expansion rate was unaffected by NaCl. PBZ reduced dry weight for peach only, but PBZ increased photosynthesis and reduced leaf expansion rate for both species. Relative water content was decreased by salt but increased by PBZ. PBZ reduced the foliar Na and Cl content in peach but not olive. Olive had less Na in leaves than peach at 36 mmol NaCI, accumulated less C in leaves in all salt treatments, and had higher foliar Na without symptom expression. PBZ may reduce salt stress in sensitive species like peach by reducing foliar Na and Cl accumulation but has less influence on the salinity response of the more salt-tolerant olive.
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Claims 14
Claim · model-written summary
Increasing salinity decreased dry weight, photosynthesis, and leaf conductance in both species.
- Taxon
- both speciese0
- Treatment
- increasing salinitye0
- Outcome
- Dry weight, photosynthesis, and leaf conductancee0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“Dry weight, photosynthesis, and leaf conductance decreased with increasing salinity for both species.”
Claim · model-written summary
NaCl did not affect leaf expansion rate.
Not reportedTaxonComparator
Verbatim
e0“However, leaf expansion rate was unaffected by NaCl.”
Claim · model-written summary
PBZ reduced peach dry weight.
- Taxon
- peach
Prunus persicae0 - Treatment
- PBZe0
- Outcome
- dry weighte0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PBZ reduced dry weight for peach only, but PBZ increased photosynthesis and reduced leaf expansion rate for both species.”
Claim · model-written summary
PBZ increased photosynthesis in both species.
Not reportedComparator
Verbatim
e0“PBZ reduced dry weight for peach only, but PBZ increased photosynthesis and reduced leaf expansion rate for both species.”
Claim · model-written summary
PBZ reduced leaf expansion rate in both species.
Not reportedComparator
Verbatim
e0“PBZ reduced dry weight for peach only, but PBZ increased photosynthesis and reduced leaf expansion rate for both species.”
Claim · model-written summary
Salt decreased relative water content.
Not reportedTaxonComparator
Verbatim
e0“Relative water content was decreased by salt but increased by PBZ.”
Claim · model-written summary
PBZ increased relative water content.
Not reportedTaxonComparator
Verbatim
e0“Relative water content was decreased by salt but increased by PBZ.”
Claim · model-written summary
PBZ reduced foliar Na and Cl in peach.
- Taxon
- peachPrunus persicae0
- Treatment
- PBZe0
- Outcome
- foliar Na and Cl contente0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PBZ reduced the foliar Na and Cl content in peach but not olive.”
Claim · model-written summary
PBZ did not reduce foliar Na and Cl in olive.
- Taxon
- olive
Olea europaeae0 - Treatment
- PBZe0
- Outcome
- foliar Na and Cl contente0
- Direction
- note0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PBZ reduced the foliar Na and Cl content in peach but not olive.”
Claim · model-written summary
Olive had less leaf Na than peach at 36 mmol NaCl.
- Taxon
- OliveOlea europaeae0
- Outcome
- Na in leavese0
- Direction
- lesse0
- Qualifier
- 36 mmol NaCIe0
- Comparator
- peache0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Olive had less Na in leaves than peach at 36 mmol NaCI, accumulated less C in leaves in all salt treatments, and had higher foliar Na without symptom expression.”
Claim · model-written summary
Olive accumulated less leaf C in all salt treatments.
- Taxon
- OliveOlea europaeae0
- Outcome
- C in leavese0
- Direction
- lesse0
- Qualifier
- all salt treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Olive had less Na in leaves than peach at 36 mmol NaCI, accumulated less C in leaves in all salt treatments, and had higher foliar Na without symptom expression.”
Claim · model-written summary
Olive had higher foliar Na without symptoms.
- Taxon
- OliveOlea europaeae0
- Outcome
- foliar Nae0
- Direction
- highere0
- Qualifier
- without symptom expressione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Olive had less Na in leaves than peach at 36 mmol NaCI, accumulated less C in leaves in all salt treatments, and had higher foliar Na without symptom expression.”
Claim · model-written summary
The authors infer PBZ may reduce salt stress in sensitive peach by lowering foliar Na and Cl.
- Taxon
- peachPrunus persicae0
- Treatment
- PBZe0
- Outcome
- salt stresse0
- Qualifier
- reducing foliar Na and Cl accumulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PBZ may reduce salt stress in sensitive species like peach by reducing foliar Na and Cl accumulation but has less influence on the salinity response of the more salt-tolerant olive.”
Claim · model-written summary
PBZ may have less influence on salinity response in salt-tolerant olive.
- Taxon
- oliveOlea europaeae0
- Treatment
- PBZe0
- Outcome
- salinity responsee0
- Direction
- less influencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“PBZ may reduce salt stress in sensitive species like peach by reducing foliar Na and Cl accumulation but has less influence on the salinity response of the more salt-tolerant olive.”
The same questions in other papers
paclobutrazol · growth · Prunus persica (peach)Results differ
9 papers in the same direction as this paper · 11 in the opposite direction
- positive
- positive
- positive
17 papers more in this group
See all 21 papers →paclobutrazol · molecular: metabolites · Olea europaea (common olive)Positive and negative results
1 in the opposite direction
- positive
paclobutrazol · molecular: metabolites · Prunus persica (peach)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
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.