Abstract
Abstract The effects of olive leaf extract (OLE) are studied on several reproductive variables and the ovarian biochemical composition of Locusta migratoria (Orthoptera: Acrididae) adult females. The methanolic extracts are prepared from the leaves sampled during four phenological growth stages of olive tree: cluster formation (Cf), swelling inflorescence buds (Sib), full flowering (Ff) and endocarp hardening (Eh). When applied to adult females during the pre‐ovipositional phase, the treatment elicites a significant adverse effect on their reproductive potential. Indeed, OLE significantly reduces both fecundity and fertility and affects oocyte growth during the first gonadotrophic cycle, as indicated by measurements of ovarian weight, length of terminal oocytes and ovarian index. Furthermore, OLE is examined with respect to ovarian biochemical components. Biochemical analyses reveal a significant reduction of ovarian contents of proteins, lipids and carbohydrates, suggesting a disruption in the incorporation of the haemolymph metabolites in the oocytes and an interference of OLE with the vitellogenesis process. The antigonadotrophic effect is confirmed by a histological study of the ovaries, which clearly shows a delay in ovarian development and in yolk accumulation in the basal oocytes of treated females. The most effect is noted with the extract prepared from the leaves collected at the swelling inflorescence buds for all measured parameters, which appears to be related to its high content of polyphenols.
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Claims 6
Claim · model-written summary
Olive leaf extract significantly reduced fecundity and fertility of female Locusta migratoria.
- Taxon
- olive
Olea europaeae0 - Treatment
- olive leaf extract (OLE)e0
- Interactor
- Locusta migratoria
Locusta migratoriae0pest - Outcome
- fecundity and fertilitye2
- Direction
- reducese2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of olive leaf extract (OLE) are studied on several reproductive variables and the ovarian biochemical composition of Locusta migratoria (Orthoptera: Acrididae) adult females”
e2“Indeed, OLE significantly reduces both fecundity and fertility and affects oocyte growth during the first gonadotrophic cycle”
Claim · model-written summary
Olive leaf extract reduced ovarian contents of proteins, lipids and carbohydrates in female Locusta migratoria.
- Taxon
- oliveOlea europaeae0
- Organ / stage
- ovariane3
- Treatment
- olive leaf extract (OLE)e0
- Interactor
- Locusta migratoriaLocusta migratoriae0pest
- Outcome
- ovarian contents of proteins, lipids and carbohydratese3
- Direction
- reductione3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of olive leaf extract (OLE) are studied on several reproductive variables and the ovarian biochemical composition of Locusta migratoria (Orthoptera: Acrididae) adult females”
e3“Biochemical analyses reveal a significant reduction of ovarian contents of proteins, lipids and carbohydrates”
Claim · model-written summary
Olive leaf extract delayed ovarian development and yolk accumulation in female Locusta migratoria.
- Taxon
- oliveOlea europaeae0
- Treatment
- olive leaf extract (OLE)e0
- Interactor
- Locusta migratoriaLocusta migratoriae0pest
- Outcome
- ovarian development and in yolk accumulatione4
- Direction
- delaye4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of olive leaf extract (OLE) are studied on several reproductive variables and the ovarian biochemical composition of Locusta migratoria (Orthoptera: Acrididae) adult females”
e4“The antigonadotrophic effect is confirmed by a histological study of the ovaries, which clearly shows a delay in ovarian development and in yolk accumulation in the basal oocytes of treated females”
Claim · model-written summary
The extract from leaves collected at the swelling inflorescence bud stage had the strongest effect on all measured parameters of female Locusta migratoria.
- Taxon
- oliveOlea europaeae0
- Treatment
- the extract prepared from the leaves collected at the swelling inflorescence budse5
- Interactor
- Locusta migratoriaLocusta migratoriae0pest
- Outcome
- all measured parameterse5
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of olive leaf extract (OLE) are studied on several reproductive variables and the ovarian biochemical composition of Locusta migratoria (Orthoptera: Acrididae) adult females”
e5“The most effect is noted with the extract prepared from the leaves collected at the swelling inflorescence buds for all measured parameters”
Claim · model-written summary
The strongest effect of the swelling inflorescence bud extract appears related to its high polyphenol content.
- Taxon
- oliveOlea europaeae0
- Compound
- polyphenolse6
- Outcome
- effecte5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of olive leaf extract (OLE) are studied on several reproductive variables and the ovarian biochemical composition of Locusta migratoria (Orthoptera: Acrididae) adult females”
e5“The most effect is noted with the extract prepared from the leaves collected at the swelling inflorescence buds for all measured parameters”
e6“which appears to be related to its high content of polyphenols”
Claim · model-written summary
Olive leaf extract affects oocyte growth in female Locusta migratoria during the first gonadotrophic cycle.
- Taxon
- oliveOlea europaeae0
- Treatment
- olive leaf extract (OLE)e0
- Interactor
- Locusta migratoriaLocusta migratoriae0pest
- Outcome
- oocyte growthe2
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effects of olive leaf extract (OLE) are studied on several reproductive variables and the ovarian biochemical composition of Locusta migratoria (Orthoptera: Acrididae) adult females”
e2“Indeed, OLE significantly reduces both fecundity and fertility and affects oocyte growth during the first gonadotrophic cycle”