维管射线是由射线原始细胞分裂,分化而成,因此,是 次生结构,所以也称次生射线(secondary ray),它位于次生木质部和次生韧皮部内,数目不固定,随着新维管组织的形成,茎的增粗也不断地增加.
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secondary gamma ray 二次伽玛射线
secondary medullary ray 次生髓射线
secondary beta-ray 次级β射线
secondary cosmic ray count 次级宇宙线计数
secondary x-ray reabsorption 次级x光子重吸收
In the calculation of the experimental data, the secondary fluorescent X-ray intensity was considered with the tertiary neglected.
在实验数据计算中，考虑了二次荧光的贡献，忽略了三次荧光强度。
They were accumulated in the large central vacuoles of secondary phloem parenchyma cells and secondary phloem ray cells.
这些蛋白质积累在韧皮薄壁细胞和韧皮射线细胞的中央大液泡里。
It is a lateral meristem and contains fusiform initials giving rise to secondary xylem and phloem and ray initials giving rise to medullary rays. See also secondary growth.
维管形成层属于侧生分生组织，包括能够产生次生木质部与次生韧皮部的纺锤状形成层原始细胞和产生髓射线的射线原始细胞。
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