中期以后直至成熟，皮层和髓细胞强烈扩大、径向伸长。
The expansion and radial spread of cortex and pith cells are very strong after the mid-dle stage.
髓细胞骨髓的一种大型细胞，是血液成熟的有粒细胞的前身。
A large cell of the bone marrow that is a precursor of the mature granulocyte of the blood.
目的：探讨小鼠肾脏髓襻细段发生发育及逐渐成熟过程。
Objective: To investigate the regular pattern of development of nephron thin segment in mice.
结果表明，在玉米生理成熟期地上第二茎间髓部组织内蔗糖的含量与玉米对茎腐病的抗性密切相关，抗病的玉米杂交种的蔗糖含量明显高于感病的玉米杂交种。
Corn hybrids resistant to stalk rot had higher sucrose contents in the pith tissues of the second internode above the ground than hybrids susceptible to the disease.
结果表明，在玉米生理成熟期地上第二茎间髓部组织内蔗糖的含量与玉米对茎腐病的抗性密切相关，抗病的玉米杂交种的蔗糖含量明显高于感病的玉米杂交种。
Corn hybrids resistant to stalk rot had higher sucrose contents in the pith tissues of the second internode above the ground than hybrids susceptible to the disease.
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