麻疯树茎的解剖学研究

应用光学显微镜对麻疯树茎的解剖结构进行观察,结果表明:(1)茎的初生结构由表皮、皮层、维管柱组成。表皮细胞1层,细胞外壁角质化;皮层含有晶簇、数量较多的乳汁管,厚角组织及其以内的5～6层薄壁组织含叶绿体,皮层薄壁组织含淀粉粒和蛋白质;维管束紧靠在一起,集中在皮层和髓之间的狭窄区。(2)茎的次生结构由周皮、皮层、初生韧皮部、次生韧皮部、形成层、次生木质部、初生木质部和髓组成,周皮分化明显;厚角组织含丰富叶绿体,皮层纤维发达;初生韧皮部含有较多的乳汁管;木射线和木纤维发达,木射线薄壁细胞含丰富淀粉粒;髓富含晶簇。

Study on anatomy of the stem of Jatropha curcas

The anatomical structure of stem of Jatropha curcas were observed by optical microscope.Results showed that at first,the primary structure of the stem of Jatropha curcas was consisted of epidermis,cortex and vascular cylinder.The epidermis was only a layer with keratinized cell wall.The cortex had druses and many latex cannulas,and collenchyma with chloroplasts inside its five-six layers of parenchyma.The parenchyma inside collenchyma had starch grains and proteins,and the vascular vundles abut against together and focused on the narrow area between cortex and marrow.At second,the secondary structure of stem was consisted of periderm,cortex,primary phloem,secondary phloem,cambium,secondary xylem,primary xylem and marrow,and the differentiation of periderm was evident.The cortex was of developing fiber and collenchyma was of plenty of chloroplast.There were many latex cannula in primary phloem;the wood ray and wood fibre developed greatly,and the parenchyma of wood ray had abundant starch grains and the marrow had many druses.