大豆初生叶一般由7层原始细胞发育而成，通常形成3—4层栅拦细胞及2层脉侧叶肉细胞。
The soybean primary leaves developed from 7 layers of original cells, and 3-4 layers of palisade cells(PSC)and 2 layers of paraveinal Mesophyll cells (PVM) were formed in these leaves.
在试验所处的玉米生育时期（6叶龄），磷对所用自交系的初生根及次生根数量没有影响。
Up to 6 - leaf age of maize, the number of primary and secondary roots of all the genotypes were merely affected.
茎的初生结构中多个维管束排列成环状，节部为单隙三迹，叶迹分别来自于3条维管束或同一条维管束。
The vascular bundles of the primary structure in stem are ring arranged, and the node is unilacunar and 3-traced, which is from three vascular bundles or one vascular bundle.
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