Abstract
Seeds of Zostera marina L. are shed in Prince Edward Island waters during mid to late summer and germinate the following spring. Occasionally seeds germinate in nature before winter; they can be germinated during autumn and winter in the laboratory. Elongation of cells of the cotyledon and doubled-back axial hypocotyl pushes the embryo out of the seed coat. Cell increase plays no part in this or subsequent elongation of cotyledon and hypocotyl. Leaves emerge through the slit-like opening at the top of the cotyledonary sheath. Hairs develop from cells of the convex surface of the basal swollen hypocotyl; two adventitious roots grow from the cotyledonary node, develop root hairs, and anchor the seedling. Stelar tissues of the hypocotyl and cotyledon differentiate at germination. No characteristically thickened tracheary elements differentiate in hypocotyl or cotyledon. In the hypocotyl, phloem differentiates around the central xylem parenchyma and abuts externally on endodermis which develops Casparian strips. Xylem parenchyma differentiates adaxially against the phloem in the single cotyledonary strand. Differentiation of procambium and vascular tissues in the leaf primordia follows as these expand. Vascularization of the stem nodes is complicated by differentiation of strands to the roots and leaves. All internodes except the first have one pair of cortical bundles. The pair of lateral veins of the first true leaf differentiate in connection with the stele at that node; the lateral bundles from each later-formed leaf pass through one internode as cortical bundles and unite with the stele in the node below.
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 16
Claim · model-written summary
Seeds are shed in mid to late summer and germinate the next spring.
- Taxon
- Zostera marina L.
Zostera marinae0 - Outcome
- germinate the following springe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seeds of Zostera marina L. are shed in Prince Edward Island waters during mid to late summer and germinate the following spring.”
Claim · model-written summary
Some seeds germinate before winter in nature and can germinate in the laboratory during autumn and winter.
Verbatim
t0“ZOSTERA MARINA L.”
e0“Occasionally seeds germinate in nature before winter; they can be germinated during autumn and winter in the laboratory.”
Claim · model-written summary
Cotyledon and hypocotyl cell elongation pushes the embryo out of the seed coat.
Verbatim
t0“ZOSTERA MARINA L.”
e0“Elongation of cells of the cotyledon and doubled-back axial hypocotyl pushes the embryo out of the seed coat.”
Claim · model-written summary
Cell increase does not drive elongation of cotyledon or hypocotyl.
Verbatim
t0“ZOSTERA MARINA L.”
e0“Cell increase plays no part in this or subsequent elongation of cotyledon and hypocotyl.”
Claim · model-written summary
Leaves emerge through a cotyledonary sheath opening.
Verbatim
t0“ZOSTERA MARINA L.”
e0“Leaves emerge through the slit-like opening at the top of the cotyledonary sheath.”
Claim · model-written summary
Hairs develop on the basal swollen hypocotyl.
Verbatim
t0“ZOSTERA MARINA L.”
e0“Hairs develop from cells of the convex surface of the basal swollen hypocotyl; two adventitious roots grow from the cotyledonary node, develop root hairs, and anchor the seedling.”
Claim · model-written summary
Two adventitious roots grow from the cotyledonary node, develop hairs, and anchor the seedling.
Verbatim
t0“ZOSTERA MARINA L.”
e0“Hairs develop from cells of the convex surface of the basal swollen hypocotyl; two adventitious roots grow from the cotyledonary node, develop root hairs, and anchor the seedling.”
Claim · model-written summary
Hypocotyl and cotyledon stelar tissues differentiate at germination.
Verbatim
t0“ZOSTERA MARINA L.”
e0“Stelar tissues of the hypocotyl and cotyledon differentiate at germination.”
Claim · model-written summary
Thickened tracheary elements do not differentiate in the hypocotyl or cotyledon.
Verbatim
t0“ZOSTERA MARINA L.”
e0“No characteristically thickened tracheary elements differentiate in hypocotyl or cotyledon.”
Claim · model-written summary
Hypocotyl phloem differentiates around xylem parenchyma and abuts endodermis with Casparian strips.
Verbatim
t0“ZOSTERA MARINA L.”
e0“In the hypocotyl, phloem differentiates around the central xylem parenchyma and abuts externally on endodermis which develops Casparian strips.”
Claim · model-written summary
Cotyledonary xylem parenchyma differentiates adaxially against phloem.
Verbatim
t0“ZOSTERA MARINA L.”
e0“Xylem parenchyma differentiates adaxially against the phloem in the single cotyledonary strand.”
Claim · model-written summary
Leaf primordia procambium and vascular tissues differentiate as leaves expand.
Verbatim
t0“ZOSTERA MARINA L.”
e0“Differentiation of procambium and vascular tissues in the leaf primordia follows as these expand.”
Claim · model-written summary
Stem-node vascularization includes strands to roots and leaves.
Verbatim
t0“ZOSTERA MARINA L.”
e0“Vascularization of the stem nodes is complicated by differentiation of strands to the roots and leaves.”
Claim · model-written summary
All internodes but the first have a pair of cortical bundles.
Verbatim
t0“ZOSTERA MARINA L.”
e0“All internodes except the first have one pair of cortical bundles.”
Claim · model-written summary
First true leaf lateral veins connect with the stele at that node.
Verbatim
t0“ZOSTERA MARINA L.”
e0“The pair of lateral veins of the first true leaf differentiate in connection with the stele at that node; the lateral bundles from each later-formed leaf pass through one internode as cortical bundles and unite with the stele in the node below.”
Claim · model-written summary
Later leaf lateral bundles traverse one internode and join the stele below.
Verbatim
t0“ZOSTERA MARINA L.”
e0“The pair of lateral veins of the first true leaf differentiate in connection with the stele at that node; the lateral bundles from each later-formed leaf pass through one internode as cortical bundles and unite with the stele in the node below.”