Fructification includes peel, seed coat, cotyledon and embryo 4 parts.
果实包括果皮.种皮.子叶和胚四部分.
Its cotyledon node zone is telome elongation type.
结果表明:向日葵幼苗的子叶节区类型为顶枝伸长型.
Among cotyledon , petiole of cotyledon, hypocotyl, and radicle, hypocotyl has the most responsive explants to 2, 4 - D .
在子叶 、 叶柄 、 胚轴以及胚根四者当中, 下胚轴对2, 4-D 的反应状况最好.