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2026-01-19

“calyptrogen”的英文意思

单词 calyptrogen
释义 calyptrogen Bot.|kəˈlɪptrədʒɛn|
[f. Gr. καλύπτρα covering + -gen taken in sense of ‘producer’.]
The outer zone or layer of the meristem or primary tissue of the youngest part of plants.
1881Nature XXIII. 288 Four zones of meristem:—calyptrogen, dermatogen, periblem and plerome.1884Bower & Scott De Bary's Phaner. & Ferns 9 Since this accession originates in certain cases from a special layer of meristem, the latter is to be distinguished as the calyptrogen.
“calyptrogen”的英文意思

　

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