Abstract
Various products are used to mitigate the negative effects of abiotic stress in olive trees. The aim of the research was to examine an anti-transpirant product (Vapor Gard®, V) and a kaolin- based product (Manisol, K) effect on the growth of two-year-old olive tree seedlings under high temperature. The study was conducted in a greenhouse on trees of a native cultivar of Campania (cv. Salella) grown in pot during the growing season from May to September 2020. The experimental design included two products: di-1-p-menthene (product V) and kaolin (product K), applied five times at 20 day intervals compared with a control. The following biometric, physiological, and nutraceutical parameters were evaluated: stomatal conductance, chlorophyll a fluorescence, Soil Plant Analysis Development (SPAD) index, relative water content (RWC), shoots growth, total leaf area per plant, trunk cross-sectional area, dry matter partitioning, total polyphenols, and antioxidant activity. The results obtained showed that the application of di-1-p-menthene (V) was able to induce a significant improvement of shoots growth (+37.22%) and trunk cross-sectional area (+46.60%) and a reduction of the stomatal conductance and an increase of leaf RWC values. Application with kaolin had positive effects on the total polyphenol content, with an increase over the control of 240.33% and higher antioxidant activity values. Further studies are necessary to determine the effect of these products on the biometric, physiological and nutraceutical parameters of mature olive trees cultivated in open field conditions.
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Claims 6
Claim · model-written summary
Di-1-p-menthene increased shoot growth by 37.22% against control.
- Taxon
- Olea europaea L.
Olea europaeat0 - Treatment
- di-1-p-menthene (V)e0
- Outcome
- shoots growthe0
- Direction
- improvemente0
- Value
- +37.22%e0
- Comparator
- a controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of di-1-p-menthene (V) was able to induce a significant improvement of shoots growth (+37.22%)”
e1“applied five times at 20 day intervals compared with a control”
t0“Olive Trees (Olea europaea L.)”
Claim · model-written summary
Di-1-p-menthene increased trunk cross-sectional area by 46.60% against control.
- Taxon
- Olea europaea L.Olea europaeat0
- Treatment
- di-1-p-menthene (V)e0
- Outcome
- trunk cross-sectional areae0
- Direction
- improvemente0
- Value
- +46.60%e0
- Comparator
- a controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of di-1-p-menthene (V) was able to induce a significant improvement of shoots growth (+37.22%) and trunk cross-sectional area (+46.60%)”
e1“applied five times at 20 day intervals compared with a control”
t0“Olive Trees (Olea europaea L.)”
Claim · model-written summary
Di-1-p-menthene reduced stomatal conductance.
- Taxon
- Olea europaea L.Olea europaeat0
- Treatment
- di-1-p-menthene (V)e0
- Outcome
- stomatal conductancee0
- Direction
- reductione0
- Comparator
- a controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“application of di-1-p-menthene (V) was able to induce a significant improvement of shoots growth (+37.22%) and trunk cross-sectional area (+46.60%) and a reduction of the stomatal conductance”
e1“compared with a control”
t0“Olive Trees (Olea europaea L.)”
Claim · model-written summary
Di-1-p-menthene increased leaf relative water content.
- Taxon
- Olea europaea L.Olea europaeat0
- Treatment
- di-1-p-menthene (V)e1
- Outcome
- leaf RWC valuese0
- Direction
- increasee0
- Comparator
- a controle2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“an increase of leaf RWC values”
e1“application of di-1-p-menthene (V)”
e2“compared with a control”
t0“Olive Trees (Olea europaea L.)”
Claim · model-written summary
Kaolin raised total polyphenol content by 240.33% over control.
- Taxon
- Olea europaea L.Olea europaeat0
- Treatment
- kaoline0
- Outcome
- total polyphenol contente0
- Direction
- increasee0
- Value
- 240.33%e0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application with kaolin had positive effects on the total polyphenol content, with an increase over the control of 240.33%”
t0“Olive Trees (Olea europaea L.)”
Claim · model-written summary
Kaolin produced higher antioxidant activity values.
- Taxon
- Olea europaea L.Olea europaeat0
- Treatment
- kaoline0
- Outcome
- antioxidant activity valuese0
- Direction
- highere0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application with kaolin had positive effects on the total polyphenol content, with an increase over the control of 240.33% and higher antioxidant activity values”
t0“Olive Trees (Olea europaea L.)”
The same questions in other papers
kaolin · quality: phytochemicals · Olea europaea (common olive)Results agree
3 papers in the same direction as this paper
- positive
- positive
- 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.