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epicotyl n.【植物;植物學】上胚軸。

epicotyledonary

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 根據金魚草幼苗初生維管系統導管分子發育的時空性,即子葉和子葉節區下部導管分子先形成,然后向下形成下胚軸-根區的導管分子,最后子葉節區中、上部與上胚軸-苗區的導管分子再發生連接,據此支持將幼苗分為子葉節區、下胚軸-根區和上胚軸-苗區的幼苗分區模型。

Plantlet regeneration and agrobacterium - mediated transformation of peanut with epicotyl as explants 花生上胚軸為外植體的植株再生及轉化研究

Increasing proportions of the tree's pollen reduced the percentage of full seed and retarded growth of the epicotyl . 樹木本身花粉比例的增加使飽滿種子的比例降低,并使胚軸生長緩慢。