Its cotyledon node zone is telome elongation type.

向日葵幼苗的子叶节区类为顶枝伸长。

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的细胞膜、细胞间隙和子叶薄壁组织细胞的细胞质也有PAO的大量分布。

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，精氨含量和精氨性子叶中最高，且随幼苗生长发育逐渐下降，其次为叶片和茎，根中最低。