Its cotyledon node zone is telome elongation type.

向日葵幼苗节区类型为顶枝伸长型。

The results showed that the levels of arginine and arginase were the highest in cotyledons, which decreased slowly during plant development, followed by leaves and stems, with roots being the lowest.

结果表明，精氨酸含量和精氨酸酶活高，且随幼苗生长发育逐渐下降，其次为片和茎，根。

The large amount of PAO could be found in the cytoplasm of parenchyma in cotyledon and in the cell membranes and intercellular spaces of cortical parenchyma in phyllogen.

顶芽皮层薄壁组织细胞细胞膜、细胞间隙和薄壁组织细胞细胞质也有PAO大量分布。