Abstract
Abstract Sosnowsky’s hogweed (Heracleum sosnowskyi Manden.) mericarps were collected from satellite and stem branch umbels for comparative anatomical investigation. Located near Vilnius city, the habitat of Heracleum sosnowskyi, formerly a natural forest edge has recently been densely occupied by plants of this species. SEM micrographs of abaxial and adaxial surfaces of mericarps obtained from satellite and stem branch umbels of H. sosnowskyi were similar, but morphometrical analysis revealed statistically significant differences in mericarps collected from satellite umbels, which were longer and wider than mericarps from stem branch umbels. The data on longitudinal sections of H. sosnowskyi mericarps clearly showed that embryos of satellite umbels were at later torpedo stage compared to embryos of stem branch umbels, which were at earlier heart stage. These data represent unequal development of the embryos in mericarps from different types of umbels. Such different development can be treated as an adaptation of the invasive plant to occupy the current habitat and survive in the seed bank by allowing the embryo to complete development within a seed and germinate when new conditions permit.
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Claims 5
Claim · model-written summary
Mericarp surfaces from satellite and stem branch umbels of H. sosnowskyi appeared similar in SEM micrographs.
- Taxon
- H. sosnowskyi
.jpg?width=60)
Heracleum sosnowskyie0 - Organ / stage
- mericarpse0
- Outcome
- SEM micrographs of abaxial and adaxial surfacese0
- Direction
- similare0
- Comparator
- stem branch umbelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“SEM micrographs of abaxial and adaxial surfaces of mericarps obtained from satellite and stem branch umbels of H. sosnowskyi were similar”
Claim · model-written summary
Mericarps from satellite umbels were longer than those from stem branch umbels.
- Taxon
- Heracleum sosnowskyiHeracleum sosnowskyit0
- Organ / stage
- mericarpse0
- Outcome
- longere0
- Direction
- longere0
- Comparator
- stem branch umbelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“morphometrical analysis revealed statistically significant differences in mericarps collected from satellite umbels, which were longer and wider than mericarps from stem branch umbels.”
t0“Heracleum sosnowskyi”
Claim · model-written summary
Mericarps from satellite umbels were wider than those from stem branch umbels.
- Taxon
- Heracleum sosnowskyiHeracleum sosnowskyit0
- Organ / stage
- mericarpse0
- Outcome
- widere0
- Direction
- widere0
- Comparator
- stem branch umbelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“morphometrical analysis revealed statistically significant differences in mericarps collected from satellite umbels, which were longer and wider than mericarps from stem branch umbels.”
t0“Heracleum sosnowskyi”
Claim · model-written summary
Embryos in satellite umbels reached the later torpedo stage versus the earlier heart stage in stem branch umbels.
- Taxon
- H. sosnowskyiHeracleum sosnowskyie0
- Organ / stage
- embryose0
- Outcome
- later torpedo stagee0
- Comparator
- embryos of stem branch umbelse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The data on longitudinal sections of H. sosnowskyi mericarps clearly showed that embryos of satellite umbels were at later torpedo stage compared to embryos of stem branch umbels, which were at earlier heart stage.”
Claim · model-written summary
The authors interpret unequal embryo development as an adaptation for habitat occupation and seed-bank survival.
- Taxon
- Heracleum sosnowskyiHeracleum sosnowskyit0
- Organ / stage
- embryoe0
- Outcome
- survive in the seed banke0
- Qualifier
- can be treated as an adaptatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Such different development can be treated as an adaptation of the invasive plant to occupy the current habitat and survive in the seed bank by allowing the embryo to complete development within a seed and germinate when new conditions permit.”
t0“Heracleum sosnowskyi”