见于某些属的禾本科植物，是鞘叶基部与胚盘之间缩小的组织。
幼苗中胚轴切段节和节间的通透性和物质运转进行了比较。
Comparison of regional permeability and translocation across the node and the internode in the etiolated mesocotyl excised from corn Zea mays l.
研究结果表明，在中国北方发现的部分杂草稻具有较强的中胚轴伸长特性和芽鞘节间伸长特性。
Results showed that the elongation of mesocotyl and internode of coleoptile played important roles in the seedling emergence of the weedy rice from northern China.
甲醇提取大豆胚轴中的异黄酮类和皂甙，以薄层色谱法、高效液相色谱法检测其组成。
METHODS Extract of soybean hypocotyl rich in isoflavonoids and saponins were isolated with methanol and investigated using TLC and HPLC.
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