原生中柱
yuán shēnɡ zhōnɡ zhù
- 名protostele
原生中柱-
子叶节区下部的单体型原生中柱；
The type of haplostele in the lower part of cotyledon node zone ;
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根具四原型原生中柱。
The stele of the root is tetrarch .
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单中柱：原生中柱的一种类型，是由韧皮部、中柱鞘和内皮层包围着内方的木质部构成的实心中柱。
Haplostele A type of protostele having a solid strand of stele with the xylem on the inside encircled by phloem , pericycle , and endodermis .