siphonostele
Quick Summary
A siphonostele is a type of stele, which is the central vascular cylinder of a plant stem or root. In a siphonostele, the vascular tissue, composed of xylem and phloem, forms a ring around a central core of pith parenchyma. This structure is found in the stems of many ferns and some other vascular plants. The term "siphonostele" comes from Greek words meaning "tube" and "stele," referring to its hollow, tube-like appearance. This arrangement allows for efficient transport of water and nutrients throughout the plant.1
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lower vascular plantVascular system…common in fern stems are siphonosteles, having a pith in the centre with the vascular tissue forming a cylinder around it. Where a fern leaf is attached to a stem, a part of the vascular tissue of the stem goes into it (a leaf trace), making a slight gap, filled…
Read More…common in fern stems are siphonosteles, having a pith in the centre with the vascular tissue forming a cylinder around it. Where a fern leaf is attached to a stem, a part of the vascular tissue of the stem goes into it (a leaf trace), making a slight gap, filled…
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fernVascular tissuesThere are, however, numerous “siphonostelic” ferns, in which the gaps do not overlap and a given section shows only one gap, and some “protostelic” ferns, in which no gaps at all are formed. Complex stelar patterns are known in some species, as in the common bracken fern (Pteridium), which…
Read MoreThere are, however, numerous “siphonostelic” ferns, in which the gaps do not overlap and a given section shows only one gap, and some “protostelic” ferns, in which no gaps at all are formed. Complex stelar patterns are known in some species, as in the common bracken fern (Pteridium), which…
Read More