Claim · model-written summary
Leaves emerge through a cotyledonary sheath opening.
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValueQualifier
Verbatim
t0“ZOSTERA MARINA L.”
e0“Leaves emerge through the slit-like opening at the top of the cotyledonary sheath.”
Title
STUDIES OF THE DEVELOPMENT OF ZOSTERA MARINA L.: II. GERMINATION AND SEEDLING DEVELOPMENT
A. R. A. Taylor Canadian Journal of Botany 1957. doi:10.1139/b57-058
Other claims from this paper (15)
- Observation Seeds are shed in mid to late summer and germinate the next spring.
- Observation Some seeds germinate before winter in nature and can germinate in the laboratory during autumn and winter.
- Observation Cotyledon and hypocotyl cell elongation pushes the embryo out of the seed coat.
- Observation Cell increase does not drive elongation of cotyledon or hypocotyl.
- Observation Hairs develop on the basal swollen hypocotyl.
- Observation Two adventitious roots grow from the cotyledonary node, develop hairs, and anchor the seedling.
- Observation Hypocotyl and cotyledon stelar tissues differentiate at germination.
- Observation Thickened tracheary elements do not differentiate in the hypocotyl or cotyledon.
- Observation Hypocotyl phloem differentiates around xylem parenchyma and abuts endodermis with Casparian strips.
- Observation Cotyledonary xylem parenchyma differentiates adaxially against phloem.
- Observation Leaf primordia procambium and vascular tissues differentiate as leaves expand.
- Observation Stem-node vascularization includes strands to roots and leaves.
- Observation All internodes but the first have a pair of cortical bundles.
- Observation First true leaf lateral veins connect with the stele at that node.
- Observation Later leaf lateral bundles traverse one internode and join the stele below.