Abstract
The response of three-month-old rooted cuttings of the olive cultivars ‘Picual’ and ‘Koroneiki’ grown in black plastic bags containing perlite as a substrate to excess manganese (Mn) (640 μM) was studied. The rooted cuttings were irrigated with 50% modified Hoagland nutrient solution. At the end of the experimental period, which lasted 130 days, the total fresh and dry weights, as well as the shoot elongation of ‘Picual’ plants were significantly reduced under excess Mn (640 μM), compared to the control plants (2 μM), whereas the growth of ‘Koroneiki’ plants was similar in both Mn treatments. The tolerance index, which is derived from the ratios between the plant growth data of different treatments and the control one, of ‘Picual’ plants to excess Mn was about half of this of ‘Koroneiki’ plants. In both cultivars, the concentrations of Mn in various plant parts (root, basal stem, top stem, basal leaves, top leaves) were significantly increased as Mn concentration in the nutrient solution increased. Furthermore, in the 640 μM Mn treatment, 2 to 2.5-fold greater Mn concentrations were recorded in almost all plant parts of ‘Koroneiki’, than those of ‘Picual’. Similar results were recorded with regard to the total Mn content per plant (‘Koroneiki’ absorbed much more Mn from the nutrient solution than ‘Picual’). On the other hand, excess Mn negatively affected the absorption of iron (Fe), calcium (Ca), magnesium (Mg), phosphorus (P), zinc (Zn), and boron (B), depending on the olive cultivar. In both cultivars, while the Mn use efficiency was significantly decreased under excess Mn conditions, the nutrient use efficiencies of P, Ca, and Fe were significantly increased, compared to the control plants (2 μM Mn). It was also found that excess Mn resulted in a significant increase of stomatal conductance and transpiration rate of both cultivars, whereas the photosynthetic rate was significantly increased only in ‘Koroneiki’. In ‘Picual’, similar photosynthetic rates were recorded in both Mn treatments. The measurement of the various chlorophyll fluorescence parameters, Fv/Fm and Fv/F0 ratios, revealed that the functional integrity of photosystem II (PSII) of photosynthesis was not affected due to excess Mn, irrespectively of the cultivar. In conclusion, although ‘Koroneiki’ tissues had much higher Mn concentrations than those of ‘Picual’, the parameters related to the growth and photosynthetic performance of plants indicates that the internal tolerance of ‘Koroneiki’ tissues to excess Mn was higher than this of ‘Picual’.
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Claims 15
Claim · model-written summary
In Picual olive plants, total fresh and dry weights and shoot elongation were significantly reduced under excess Mn compared with control plants.
- Taxon
- olive
Olea europaeae0 - Material
- Picuale1
- Treatment
- excess Mne1
- Outcome
- total fresh and dry weights, as well as the shoot elongatione1
- Direction
- reducede1
- Comparator
- control plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“olive cultivars ‘Picual’”
e1“the total fresh and dry weights, as well as the shoot elongation of ‘Picual’ plants were significantly reduced under excess Mn (640 μM), compared to the control plants”
Claim · model-written summary
Growth of Koroneiki olive plants was similar in both Mn treatments.
- Taxon
- oliveOlea europaeae0
- Material
- Koroneikie1
- Treatment
- Mn treatmentse1
- Outcome
- growthe1
- Direction
- similare1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“olive cultivars ‘Picual’”
e1“the growth of ‘Koroneiki’ plants was similar in both Mn treatments”
Claim · model-written summary
The tolerance index of Picual plants to excess Mn was about half that of Koroneiki plants.
- Taxon
- oliveOlea europaeae0
- Material
- Picuale1
- Treatment
- excess Mne1
- Outcome
- tolerance indexe1
- Value
- about halfe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“olive cultivars ‘Picual’”
e1“The tolerance index, which is derived from the ratios between the plant growth data of different treatments and the control one, of ‘Picual’ plants to excess Mn was about half of this of ‘Koroneiki’ plants”
Claim · model-written summary
In both olive cultivars, Mn concentrations in root, stem and leaf parts increased significantly as the Mn concentration in the nutrient solution increased.
- Taxon
- oliveOlea europaeae0
- Organ / stage
- root, basal stem, top stem, basal leaves, top leavese1
- Treatment
- Mn concentration in the nutrient solutione1
- Outcome
- concentrations of Mne1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“olive cultivars ‘Picual’”
e1“In both cultivars, the concentrations of Mn in various plant parts (root, basal stem, top stem, basal leaves, top leaves) were significantly increased as Mn concentration in the nutrient solution increased”
Claim · model-written summary
At the high Mn treatment, Koroneiki had 2 to 2.5-fold greater Mn concentrations than Picual in almost all plant parts.
- Taxon
- oliveOlea europaeae0
- Material
- Koroneikie1
- Outcome
- Mn concentrationse1
- Value
- 2 to 2.5-fold greatere1
- Comparator
- Picuale1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“olive cultivars ‘Picual’”
e1“2 to 2.5-fold greater Mn concentrations were recorded in almost all plant parts of ‘Koroneiki’, than those of ‘Picual’”
Claim · model-written summary
Koroneiki absorbed much more Mn from the nutrient solution than Picual, giving a higher total Mn content per plant.
- Taxon
- oliveOlea europaeae0
- Material
- Koroneikie1
- Outcome
- total Mn content per plante1
- Comparator
- Picuale1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“olive cultivars ‘Picual’”
e1“Similar results were recorded with regard to the total Mn content per plant (‘Koroneiki’ absorbed much more Mn from the nutrient solution than ‘Picual’)”
Claim · model-written summary
Excess Mn negatively affected the absorption of Fe, Ca and Mg in the olive cultivars, depending on cultivar.
- Taxon
- oliveOlea europaeae1
- Treatment
- excess Mne1
- Outcome
- absorption of iron (Fe), calcium (Ca), magnesium (Mg)e1
- Direction
- negatively affectede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“excess Mn negatively affected the absorption of iron (Fe), calcium (Ca), magnesium (Mg), phosphorus (P), zinc (Zn), and boron (B), depending on the olive cultivar”
Claim · model-written summary
Excess Mn negatively affected the absorption of P, Zn and B in the olive cultivars, depending on cultivar.
- Taxon
- oliveOlea europaeae1
- Treatment
- excess Mne1
- Outcome
- phosphorus (P), zinc (Zn), and boron (B)e1
- Direction
- negatively affectede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“excess Mn negatively affected the absorption of iron (Fe), calcium (Ca), magnesium (Mg), phosphorus (P), zinc (Zn), and boron (B), depending on the olive cultivar”
Claim · model-written summary
In both cultivars, Mn use efficiency decreased significantly under excess Mn compared with control plants.
- Taxon
- oliveOlea europaeae0
- Treatment
- excess Mne1
- Outcome
- Mn use efficiencye1
- Direction
- decreasede1
- Comparator
- control plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“olive cultivars ‘Picual’”
e1“In both cultivars, while the Mn use efficiency was significantly decreased under excess Mn conditions, the nutrient use efficiencies of P, Ca, and Fe were significantly increased, compared to the control plants”
Claim · model-written summary
In both cultivars, the use efficiencies of P, Ca and Fe increased significantly under excess Mn compared with control plants.
- Taxon
- oliveOlea europaeae0
- Treatment
- excess Mne1
- Outcome
- nutrient use efficiencies of P, Ca, and Fee1
- Direction
- increasede1
- Comparator
- control plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“olive cultivars ‘Picual’”
e1“In both cultivars, while the Mn use efficiency was significantly decreased under excess Mn conditions, the nutrient use efficiencies of P, Ca, and Fe were significantly increased, compared to the control plants”
Claim · model-written summary
Excess Mn significantly increased stomatal conductance and transpiration rate in both olive cultivars.
- Taxon
- oliveOlea europaeae0
- Treatment
- excess Mne1
- Outcome
- stomatal conductance and transpiration ratee1
- Direction
- increasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“olive cultivars ‘Picual’”
e1“excess Mn resulted in a significant increase of stomatal conductance and transpiration rate of both cultivars, whereas the photosynthetic rate was significantly increased only in ‘Koroneiki’”
Claim · model-written summary
Excess Mn significantly increased the photosynthetic rate only in Koroneiki.
- Taxon
- oliveOlea europaeae0
- Material
- Koroneikie1
- Treatment
- excess Mne1
- Outcome
- photosynthetic ratee1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“olive cultivars ‘Picual’”
e1“excess Mn resulted in a significant increase of stomatal conductance and transpiration rate of both cultivars, whereas the photosynthetic rate was significantly increased only in ‘Koroneiki’”
Claim · model-written summary
In Picual, photosynthetic rates were similar in both Mn treatments.
- Taxon
- oliveOlea europaeae0
- Material
- Picuale1
- Treatment
- Mn treatmentse1
- Outcome
- photosynthetic ratese1
- Direction
- similare1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“olive cultivars ‘Picual’”
e1“In ‘Picual’, similar photosynthetic rates were recorded in both Mn treatments”
Claim · model-written summary
Excess Mn did not affect the functional integrity of photosystem II in either cultivar, as measured by chlorophyll fluorescence parameters.
- Taxon
- oliveOlea europaeae0
- Treatment
- excess Mne1
- Outcome
- functional integrity of photosystem II (PSII)e1
- Direction
- not affectede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“olive cultivars ‘Picual’”
e1“the functional integrity of photosystem II (PSII) of photosynthesis was not affected due to excess Mn, irrespectively of the cultivar”
Claim · model-written summary
The authors conclude that the internal tolerance of Koroneiki tissues to excess Mn was higher than that of Picual.
- Taxon
- oliveOlea europaeae0
- Material
- Koroneikie1
- Treatment
- excess Mne1
- Outcome
- internal tolerancee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“olive cultivars ‘Picual’”
e1“the internal tolerance of ‘Koroneiki’ tissues to excess Mn was higher than this of ‘Picual’”
The same questions in other papers
manganese atom · growth · Olea europaea (common olive)Results differ
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
manganese atom · nutrient: content · Olea europaea (common olive)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
1 paper more in this group
See all 5 papers →manganese atom · physiology: photosynthesis · Olea europaea (common olive)Results agree
1 paper in the same direction as this paper
- negative
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.