Abstract
The olive leaves are known as a source of nutraceuticals due to their richness in phenolics. Numerous studies explored the effect of several factors on leaf phenolics but few studies focused on the impact of foliar fertilizers on leaf phenolics. In this context, our study aimed to explore the effect of season and foliar fertilisers on phenolics in leaves of “Chemlali” olive cultivar. Four foliar fertilisers were sprayed separately at different seasons. Total polyphenol, total flavonoid ortho-diphenol and oleuropein contents were assessed in fresh olive leaves. Our results showed that polyphenols and ortho-diphenols reached their maximum in April, decreased in August and rose again in November. Flavonoid showed an inverted trend and were the most affected by the different foliar fertilisers. Oleuropein content had two peaks in April and November and was not affected by foliar fertilisers. Taking into consideration these results, the optimal periods to collect olive leaves are April and November. Our study brought out evidences about the impact of foliar nutrition on olive leaves.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
Olive leaf polyphenols peaked in April, fell in August and rose in November.
- Taxon
- olive
Olea europaeat0 - Material
- Chemlalit0
- Organ / stage
- leavest0
- Outcome
- polyphenolse0
- Direction
- decreasede0
- Qualifier
- maximum in Aprile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“leaves of Chemlali olive cultivar”
e0“polyphenols and ortho-diphenols reached their maximum in April, decreased in August and rose again in November”
Claim · model-written summary
Olive leaf ortho-diphenols peaked in April, fell in August and rose in November.
- Taxon
- oliveOlea europaeat0
- Material
- Chemlalit0
- Outcome
- ortho-diphenolse0
- Direction
- decreasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“leaves of Chemlali olive cultivar”
e0“polyphenols and ortho-diphenols reached their maximum in April, decreased in August and rose again in November”
Claim · model-written summary
Olive leaf flavonoids had an inverted seasonal trend.
- Taxon
- oliveOlea europaeat0
- Outcome
- Flavonoide0
- Qualifier
- inverted trende0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“leaves of Chemlali olive cultivar”
e0“Flavonoid showed an inverted trend and were the most affected by the different foliar fertilisers.”
Claim · model-written summary
Flavonoids were the phenolics most affected by foliar fertilisers.
- Taxon
- oliveOlea europaeat0
- Treatment
- different foliar fertiliserse0
- Outcome
- Flavonoide0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“leaves of Chemlali olive cultivar”
e0“Flavonoid showed an inverted trend and were the most affected by the different foliar fertilisers.”
Claim · model-written summary
Oleuropein content peaked in April and November.
- Taxon
- oliveOlea europaeat0
- Outcome
- Oleuropein contente0
- Direction
- peakse0
- Qualifier
- April and Novembere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“leaves of Chemlali olive cultivar”
e0“Oleuropein content had two peaks in April and November and was not affected by foliar fertilisers.”
Claim · model-written summary
Foliar fertilisers did not affect oleuropein content.
- Taxon
- oliveOlea europaeat0
- Treatment
- foliar fertiliserse0
- Outcome
- Oleuropein contente0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“leaves of Chemlali olive cultivar”
e0“Oleuropein content had two peaks in April and November and was not affected by foliar fertilisers.”
Claim · model-written summary
The authors recommend April and November for collecting olive leaves.
- Taxon
- oliveOlea europaeae0
- Outcome
- optimal periods to collect olive leavese0
- Value
- April and Novembere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“leaves of Chemlali olive cultivar”
e0“the optimal periods to collect olive leaves are April and November”
The same questions in other papers
fertilization · molecular: metabolites · Olea europaea (common olive)Positive and negative results
2 papers in the same direction as this paper · 5 in the opposite direction
- positive
- positive
- positive
4 papers more in this group
See all 8 papers →application · molecular: metabolites · Olea europaea (common olive)Positive and negative results
2 papers in the same direction as this paper · 9 in the opposite direction
- positive
- positive
- positive
8 papers more in this group
See all 12 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.