从天葵药材的解剖结构探讨其形态本质  

Study on the Morphological Nature from the Anatomical Structure of Medicinal Parts of Semiaquil giaadosoides

作　　者：张依楠[1] 吉志超 廖海民[1] ZHANG Yi-nan Jl Zhi-chao LIAO Hai-min(Collegs of Life Sciences, Guizhou University, Guiyang, Guizhou 550025, Chin)

机构地区：[1]贵州大学生命科学学院,贵州贵阳550025

出　　处：《山地农业生物学报》2017年第3期86-89,共4页Journal of Mountain Agriculture and Biology

基　　金：贵阳市现代农业与农村科技计划(2013筑科合同[2013102]4-6号);贵州大学研究生创新基金(研理工2017030)

摘　　要：天葵"块根"是由主根及下胚轴共同膨大形成,天葵药材的形态本质应为肉质直根。天葵肉质直根的增粗主要原因是由于木薄壁细胞产生三生形成层,形成大量三生维管束;以及次生韧皮部和次生木质部中薄壁细胞的不断增加。The so-called ＂tuber＂ of S.adoxoides was formed by expansion of the tap root and hypocotyls.The morphological nature of the medicinal part of S.adoxoides should be the fleshy tap root.The main reason for the increase of the diameter of the tap root was that the tertiary cambium,which was differentiated from xylem parenchyma,produced a large number of triplet vascular bundles,as well as the growth of parenchyma in secondary xylem and phloem.

关 键 词：天葵 解剖结构 肉质直根 木薄壁细胞 三生维管束 

分 类 号：Q944.5[生物学—植物学]