The promeristem in the shoot apex consists of tunica, corpus and leaf primordium.
苗端的原分生组织由原套、原体和叶原基组成。
Leaf buttress a leaf primordium, appearing as a protuberance on the side of the stem apex, produced by periclinal division of the tunica and corpus, and associated with a procambium.
顶端分生组织上的侧生突起发育成叶的原基，与原形成层有关。
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