In plant physiology, the epicotyl is the embryonic shoot above the cotyledons. In most plants the epicotyl will eventually develop into the leaves of the plant.
例句与用法
1.
Increasing proportions of the tree's pollen reduced the percentage of full seed and retarded growth of the epicotyl . 树木本身花粉比例的增加使饱满种子的比例降低，并使胚轴生长缓慢。
2.
Plantlet regeneration and agrobacterium - mediated transformation of peanut with epicotyl as explants 花生上胚轴为外植体的植株再生及转化研究
3.
According to the space - tim e maturation during the development of the vessel elements in primary vascular system : the vessel elememts of the cotyledons and the lower portion of cnz formed firstly , then downward hypocotyl - root zone , at length , the vessel elememts of the upper and middle portion of cnz and epicotyl - shoot region connected with each other , the result uphold the seedling partition model that divides seedling into cnz , hypocotyl - root region and epicotyl - shoot region 根据金鱼草幼苗初生维管系统导管分子发育的时空性，即子叶和子叶节区下部导管分子先形成，然后向下形成下胚轴-根区的导管分子，最后子叶节区中、上部与上胚轴-苗区的导管分子再发生连接，据此支持将幼苗分为子叶节区、下胚轴-根区和上胚轴-苗区的幼苗分区模型。
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