Study on Anatomical Structure of Vegetative Organs of Portulacaria afra(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Title:: Study on Anatomical Structure of Vegetative Organs of Portulacaria afra

Author(s):: XU Xiao-lin; ZHENG Xing-feng; ZHOU Xiao-yun; College of City and Enviroment，Jiangsu Normal University，Xuzhou，Jiangsu 221116

Keywords:: Portulacaria afra; vegetative organ; anatomic structure; drought resistance

Abstract:: Using the paraffin section technique，under light microscope，the roots，stems，leaves and other vegetative organ anatomical structures of Portulacaria afra were observed，in order to explore the structure of vegetative organs of the characteristics of drought resistance.The results showed that the roots and stems of Portulacaria afra were with secondary growth，producing periderm and secondery vascular tissue.There were many big water cells in the cortex of roots and stems，marrow of stems，and mesophyll of leaves.There were abnormal cells dyed into red-brown or dark-grey in roots，stems and leaves.There were a few cells with cluster crystals in stems and leaves.The aperture of catheter was bigger and there were many axial direction wood parenchyma cells in the secondary xylem of roots.There were many starch grains in the parenchyma cells of stems，and surface of stems was with concentrated small papillae.The leaves with thick cuticle on the surface were fleshy thick and isobitateral.The stomata were paracytic type.Some characteristics were relative to drought resistance such as bigger aperture of catheter and developed wood parenchyma of roots，many water cells in roots，stems and leaves.

[1]兑宝峰,潘治明.马齿苋树的繁殖与管理[J].中国花卉园艺,2010(12):21.

[2]韩明俊.金枝玉叶的栽培与养护[J].河北林业,2009(2):40.

[3]张绍宽.盆景良材马齿苋树[J].中国花卉盆景,2000(3):45.

[4]李正理.植物组织制片学[M].北京:北京大学出版社,1996:130-139.

[5]陆时万,徐祥生,沈敏键.植物学(第2版)上册[M].北京:高等教育出版社,1994.

[6]严巧娣,苏培玺.植物含晶细胞的结构与功能[J].植物生理学通讯,2006,42(4):761-766.

[7]张晓然,吴鸿,胡正海.毛乌素沙地10种重要沙生植物叶的形态结构与环境的关系[J].西北植物学报1997,17(5):54-60.

[8]徐小林,郑兴峰,陈慧.长寿花营养器官解剖结构[J].江苏农业科学,2011,39(4):193-194.

[9]李有忠,孙和平,祁如虎,等.狭叶红景天营养器官的解剖结构及其生态学意义[J].青海师范大学学报(自然科学版),1994(4):34-40.

[10]白楠,李涛,张浩.藏药大花红景天根茎的形态组织学研究[J].华西药学杂志,2007,22(4):419-420.

[11]郑艳,巩劼,陈士超,等.瓦松(Orostachys fimbriatus)的形态解剖学研究[J].植物研究,2003,23(2):164-169.

[12]郑艳,江勇,刘登义,等.景天属(Sedum)8种植物茎的解剖学研究[J].安徽师范大学学报,2001,24(3):239-242.

[13]祁如虎,李有忠,范建平.16种高山植物叶片内的异细胞及其生态学意义[J].西北植物学报,1998,18(2):270-276.

[14]王桂芹,赵岩,段亚军.高山红景天解剖学研究[J].植物研究,2004,24(1):93-96.

Last Update: 2014-08-22