protostele
protostele defined in 1951 year
protostele - protostele;protostele - Most simple, primitive type of stele, consisting of central core of xylem surrounded by cylinder of phloem. Includes haplastele, simplest form with xylem in form of a rod; actinostele, with xylem ribbed, appearing star-shaped in transverse section; and plectostele, with xylem in form of several longitudinal parallel strips embedded in phloem. Present in stems of certain ferns, club mosses; almost universally in roots.
near protostele in Knolik
| protopterus | home letter "P" start from "PR" | prototroph |
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