Abstract
Although, the olive trees produce hermaphrodite flowers, abnormal flowers (flowers with absence or reduced stamens and flowers with absence of pistil) are frequently observed and may reduce fruit set. This study investigates the phenology evolution and the male and female abortion of the oleaster tree (or the wild olive tree) flowers (Olea europaea L. subsp. europaea var. sylvestris ) from natural ecosystems represented in two Tunisian Parks. The female abortion was evaluated by the percentage of flowers lacking pistil, and male abortion by differential staining for the cytoplasm of pollen grain. Flower abortion was examined and compared for eight oleaster trees in two different natural sites. At the beginning of flowering (the last two weeks of April), the flower numbers ranged from 15 to 26 flowers per inflorescence. However, one month after blossoming, the fruit set ranged from 1 to 3 drupes per inflorescence. Thus, a significant decrease of flowers per inflorescence was observed on all trees. The percentage of flowers without stamens and flowers without pistil per inflorescence ranged from 5.7 to 38.8% and from 4.9 to 88.1%, respectively depending on the oleaster tree. Moreover, abnormal flowers had effect on fruits number per inflorescence. Indeed, the r 2 linear regression values were 0.89 and 0.83, respectively. Therefore, due to the similar flower abnormalities occurring for the olive trees, the transfer of a low rate of abnormal flowers to cultivated olive may improve the crop.
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Claims 8
Claim · model-written summary
At the beginning of flowering the flower numbers ranged from 15 to 26 flowers per inflorescence.
- Taxon
- wild olive
Olea europaea var. sylvestrist0 - Outcome
- flower numberse0
- Value
- 15 to 26 flowers per inflorescencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wild olive (Olea europaea L.) tree (oleaster)”
e0“At the beginning of flowering (the last two weeks of April), the flower numbers ranged from 15 to 26 flowers per inflorescence”
Claim · model-written summary
One month after blossoming the fruit set ranged from 1 to 3 drupes per inflorescence.
- Taxon
- wild oliveOlea europaea var. sylvestrist0
- Outcome
- fruit sete0
- Value
- 1 to 3 drupes per inflorescencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wild olive (Olea europaea L.) tree (oleaster)”
e0“one month after blossoming, the fruit set ranged from 1 to 3 drupes per inflorescence”
Claim · model-written summary
A significant decrease of flowers per inflorescence was observed on all trees.
- Taxon
- wild oliveOlea europaea var. sylvestrist0
- Outcome
- flowers per inflorescencee0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wild olive (Olea europaea L.) tree (oleaster)”
e0“a significant decrease of flowers per inflorescence was observed on all trees”
Claim · model-written summary
The percentage of flowers without stamens per inflorescence ranged from 5.7 to 38.8% depending on the tree.
- Taxon
- wild oliveOlea europaea var. sylvestrist0
- Outcome
- flowers without stamense0
- Value
- 5.7 to 38.8%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wild olive (Olea europaea L.) tree (oleaster)”
e0“The percentage of flowers without stamens and flowers without pistil per inflorescence ranged from 5.7 to 38.8% and from 4.9 to 88.1%, respectively depending on the oleaster tree”
Claim · model-written summary
The percentage of flowers without pistil per inflorescence ranged from 4.9 to 88.1% depending on the tree.
- Taxon
- wild oliveOlea europaea var. sylvestrist0
- Outcome
- flowers without pistile0
- Value
- 4.9 to 88.1%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wild olive (Olea europaea L.) tree (oleaster)”
e0“The percentage of flowers without stamens and flowers without pistil per inflorescence ranged from 5.7 to 38.8% and from 4.9 to 88.1%, respectively depending on the oleaster tree”
Claim · model-written summary
Abnormal flowers affected fruit number per inflorescence, with a linear regression r2 of 0.89 (flowers without stamens).
- Taxon
- wild oliveOlea europaea var. sylvestrist0
- Treatment
- abnormal flowerse0
- Outcome
- fruits number per inflorescencee0
- Value
- 0.89e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wild olive (Olea europaea L.) tree (oleaster)”
e0“abnormal flowers had effect on fruits number per inflorescence. Indeed, the r 2 linear regression values were 0.89 and 0.83, respectively”
Claim · model-written summary
Abnormal flowers affected fruit number per inflorescence, with a linear regression r2 of 0.83 (flowers without pistil).
- Taxon
- wild oliveOlea europaea var. sylvestrist0
- Treatment
- abnormal flowerse0
- Outcome
- fruits number per inflorescencee0
- Value
- 0.83e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“wild olive (Olea europaea L.) tree (oleaster)”
e0“abnormal flowers had effect on fruits number per inflorescence. Indeed, the r 2 linear regression values were 0.89 and 0.83, respectively”
Claim · model-written summary
Transferring a low rate of abnormal flowers to cultivated olive may improve the crop.
- Taxon
- cultivated oliveOlea europaeae0
- Outcome
- improve the crope0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the transfer of a low rate of abnormal flowers to cultivated olive may improve the crop”