Abstract
Apical dominance and culture heterogeneity significantly limit the efficiency of olive micropropagation, hindering the rapid production of plantlets. This study explores how manipulating the explant origin (topophysis) and density can mitigate these challenges. Explants originating from apical and middle sections were cultivated at densities of 18, 24, and 30 explants per vessel. After 12 weeks, significant differences in the growth parameters were observed based on the explant origin and density. The middle-section explants exhibited superior shoot proliferation and node production, especially at higher densities. The callus weight also increased with the density, while the internode length remained relatively stable. Hormone analysis demonstrated the density-dependent spatial distribution pattern of aromatic and isoprenoid cytokinins. Notably, at higher densities, the aromatic free bases in the apical-section leaves showed migration toward the shoot apices, while this migration was less pronounced in the middle-section leaves. Isoprenoid cytokinins displayed complex distribution patterns, with free bases and O-glucosides often increasing toward the basal nodes. These findings demonstrate that optimizing the explant origin and density can effectively reduce apical dominance and enhance culture homogeneity in olive micropropagation. This approach offers a promising strategy for improving the micropropagation protocols for olive and potentially other woody plants, leading to more efficient and cost-effective production of high-quality plantlets for commercial use.
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Claims 11
Claim · model-written summary
Growth parameters of olive micropropagation differed significantly with explant origin and culture density.
- Taxon
- olive
Olea europaeat0 - Treatment
- explant origin and densitye1
- Outcome
- growth parameterse1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Olive Micropropagation”
e1“significant differences in the growth parameters were observed based on the explant origin and density”
Claim · model-written summary
Middle-section explants of olive gave superior shoot proliferation and node production, especially at higher densities.
- Taxon
- oliveOlea europaeat0
- Treatment
- middle-section explantse2
- Outcome
- shoot proliferation and node productione2
- Direction
- superiore2
- Qualifier
- especially at higher densitiese2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Olive Micropropagation”
e2“The middle-section explants exhibited superior shoot proliferation and node production, especially at higher densities”
Claim · model-written summary
Callus weight of olive cultures increased with culture density.
- Taxon
- oliveOlea europaeat0
- Treatment
- densitye3
- Outcome
- callus weighte3
- Direction
- increasede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Olive Micropropagation”
e3“The callus weight also increased with the density, while the internode length remained relatively stable”
Claim · model-written summary
Internode length of olive cultures remained relatively stable across culture densities.
- Taxon
- oliveOlea europaeat0
- Treatment
- densitye3
- Outcome
- internode lengthe3
- Direction
- no_changeinferrede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Olive Micropropagation”
e3“The callus weight also increased with the density, while the internode length remained relatively stable”
Claim · model-written summary
Hormone analysis showed a density-dependent spatial distribution pattern of aromatic and isoprenoid cytokinins in olive cultures.
- Taxon
- oliveOlea europaeat0
- Outcome
- density-dependent spatial distribution pattern of aromatic and isoprenoid cytokininse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Olive Micropropagation”
e4“Hormone analysis demonstrated the density-dependent spatial distribution pattern of aromatic and isoprenoid cytokinins”
Claim · model-written summary
At higher densities, aromatic free bases in apical-section leaves of olive migrated toward the shoot apices.
- Taxon
- oliveOlea europaeat0
- Organ / stage
- apical-section leavese1
- Treatment
- higher densitiese1
- Compound
- aromatic free basese1
- Outcome
- migration toward the shoot apicese1
- Direction
- increaseinferrede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Olive Micropropagation”
e1“Notably, at higher densities, the aromatic free bases in the apical-section leaves showed migration toward the shoot apices”
Claim · model-written summary
Migration of aromatic free bases was less pronounced in middle-section leaves of olive than in apical-section leaves.
- Taxon
- oliveOlea europaeat0
- Organ / stage
- middle-section leavese5
- Outcome
- migratione5
- Direction
- less pronouncede5
- Comparator
- apical-section leavese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Olive Micropropagation”
e5“the aromatic free bases in the apical-section leaves showed migration toward the shoot apices, while this migration was less pronounced in the middle-section leaves”
Claim · model-written summary
Isoprenoid cytokinin free bases of olive showed complex distribution patterns, often increasing toward the basal nodes.
- Taxon
- oliveOlea europaeat0
- Organ / stage
- basal nodese6
- Compound
- free basese6
- Outcome
- complex distribution patternse6
- Direction
- increasinge6
- Qualifier
- oftene6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Olive Micropropagation”
e6“Isoprenoid cytokinins displayed complex distribution patterns, with free bases and O-glucosides often increasing toward the basal nodes”
Claim · model-written summary
Isoprenoid cytokinin O-glucosides of olive showed complex distribution patterns, often increasing toward the basal nodes.
- Taxon
- oliveOlea europaeat0
- Organ / stage
- basal nodese6
- Compound
- O-glucosidese6
- Outcome
- complex distribution patternse6
- Direction
- increasinge6
- Qualifier
- oftene6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Olive Micropropagation”
e6“Isoprenoid cytokinins displayed complex distribution patterns, with free bases and O-glucosides often increasing toward the basal nodes”
Claim · model-written summary
Optimizing explant origin and density can reduce apical dominance in olive micropropagation.
- Taxon
- oliveOlea europaeat0
- Treatment
- optimizing the explant origin and densitye7
- Outcome
- apical dominancee7
- Direction
- reducee7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Olive Micropropagation”
e7“optimizing the explant origin and density can effectively reduce apical dominance”
Claim · model-written summary
Optimizing explant origin and density can enhance culture homogeneity in olive micropropagation.
- Taxon
- oliveOlea europaeat0
- Treatment
- optimizing the explant origin and densitye7
- Outcome
- culture homogeneitye1
- Direction
- enhancee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Olive Micropropagation”
e7“optimizing the explant origin and density can effectively reduce apical dominance”
e1“enhance culture homogeneity”
The same questions in other papers
in vitro · yield · Olea europaea (common olive)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- 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.