Protostele definitions

protostele

(from the article `vascular system`) The condition of the xylem, the woody elements in the stem, defines several categories. The protostele has a solid xylem core; the siphonostele has ... The vascular cylinder of a stem or root is called the stele. The simplest and apparently most primitive type of stele is the protostele, in which the...
Found on http://www.britannica.com/eb/a-z/p/124

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protostele

When a plant's vascular tissue develops in a solid central bundle, it is said to have a protostele. See also siphonostele and eustele.
Found on http://www.ucmp.berkeley.edu/glossary/gloss8botany.html

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protostele

When a plant's vascular tissue develops in a solid central bundle, it is said to have a protostele. See also siphonostele and eustele.
Found on http://www.ucmp.berkeley.edu/glossary/glossary_8.html

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protostele

the solid stele of most roots, having a central core of xylem enclosed by phloem.
Found on https://www.infoplease.com/dictionary/protostele

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