What does obliterated central lumen mean?
Answers
It means that the central lumen of the xylem fibres are not distinguishable due to highly thickened walls of the xylem.
Xylem is the vascular tissue that extends from the top to the bottom of a plant.
It helps in the transportation of water molecules and dissolved substances from the root hairs to the upper parts of a plant.
The transport system in the xylem is unidirectional. Xylem mostly covers the central part of the vascular bundle.
Xylem chiefly comprises of vessels, tracheids, xylem fibres and the xylem parenchyma.
Xylem fibres are mostly sclerenchymatous fibres that are composed of dead cells.
Xylem fibres have a highly thickened wall with a vague central lumen.
Lumen is actually the space in the center of a tube or the cell.
Obliterated Central Lumen:
- Obliterated central lumen is a condition that develops in plants when the xylem is heavily lignified and the wall becomes thickened as much that it disrupts or obliterates the lumen of the xylem.
- Xylem are tissues that carry water and nutrients to the plant from its roots.
- The substances flow through the central region or lumen of these tubes.
- When the walls of these xylem gets thickened, the central lumen is indistinguishable and is known as obliterated central lumen.
- This can cause obliteration of food transport to the plant and can result in its death.
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