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月季皮刺的组织结构与化学组成
引用本文:李慧,刘凤栾,郗琳,高彬,严珊,王玲,马男,赵梁军,杨春起.月季皮刺的组织结构与化学组成[J].园艺学报,2012,39(7):1321-1329.
作者姓名:李慧  刘凤栾  郗琳  高彬  严珊  王玲  马男  赵梁军  杨春起
作者单位:中国农业大学观赏园艺与园林系,北京 100193;北京盛斯通生态科技有限公司,北京 102202
基金项目:农业部'948’项目,农业部行业科研专项,中国农业大学专业学位研究生实践基地项目
摘    要: 以月季‘伊丽莎白女王’的幼嫩皮刺为试材,利用扫描电镜、透射电镜、傅里叶红外光谱分析等技术,研究皮刺的组织结构及化学组成。结果表明:(1)皮刺具有组织层次,表面角质化并被厚蜡质;表皮层细胞较小,呈方形,排列紧密,细胞壁较厚,细胞腔较大;紧靠表皮层内侧的1 ~ 2 层细胞,其形态类似形成层的分生细胞,细胞较小,排列紧密;再向内的5 ~ 7 层细长形细胞,细胞内腔为多孔的柱状结构;皮刺中心部为薄壁细胞组织,其细胞大而圆,细胞壁薄,排列疏松,细胞间隙大。(2)皮刺基部存在着由3 ~ 5 层细胞组成的“似离区”,与叶柄离区相比,其胞间连丝和叶绿体、线粒体及内质网等细胞器丰富且细胞间隙较多;在乙烯诱导下,“似离区”不形成离层,皮刺不脱落。(3)皮刺的化学成分主要是木质素、木栓质、纤维素及半纤维素,皮刺外部组织比内部组织木质素和木栓质含量高,“似离区”下部组织的木质素及木栓质含量较上部组织高。

关 键 词:月季  皮刺  组织结构  离区  化学组成

Studies on Anatomical Structure and Chemical Composition in Prickles of Rosa hybrida
LI Hui,LIU Feng-luan,XI Lin,GAO Bin,YAN Shan,WANG Ling,MANan,ZHAO Liang-jun,and YANG Chun-qi.Studies on Anatomical Structure and Chemical Composition in Prickles of Rosa hybrida[J].Acta Horticulturae Sinica,2012,39(7):1321-1329.
Authors:LI Hui  LIU Feng-luan  XI Lin  GAO Bin  YAN Shan  WANG Ling  MANan  ZHAO Liang-jun  and YANG Chun-qi
Institution:Department of Ornamental Horticulture and Landscape Architecture,China Agricultural University,Beijing 100193,China;Beijing Sunstone Ecosystem Science Technology Co.,Ltd,Beijing 102202,China
Abstract:By using scanning electron microscope(SEM),transmission electron microscope(TEM) and fourier transform infrared spectroscopy(FTIR),anatomical structure and chemical composition of tender prickles from rose’Queen Elizabeth’were studied.The results were shown as follows:(1)Prickles could be divided into different parts in organizational level.The surface of prickles was cornified and covered with thick wax.The cells of epidermis,with thicker cell wall and larger cellular cavity,were square,densely arranged and smaller in shape.Abut against the epidermis layer,there were one or two layers similar to the meristematic cells of cambium,the cells of which were small,orderly arranged.Then inward five to seven layers were made up of enlonged cells which had porous columnar structure in their cell lumens.In the center of prickles,the parechyma cell group existed,and made up of large,round,thin-walled cells which arranged loosely.(2)At the bottom of prickles,resembling abscission zone existed,which included 3-5 layers of cells.However,in micromorphology,cells in the region were different from cells of the petiole abscission zone.There were more plasmodesmata,chloroplast,mitochondrion,endoplasmic reticulum and intercellular space in the former one.Futhermore,under ethephon treatment,resembling abscission zone of prickles formed no abscission layer and caused no prickle fallen off.(3)Prickles mainly consisted of lignin,suberin,cellulose and hemicelluloses.The content of lignin and suberin in external tissue was higher than which in internal tissue,while the content came to be less in the upper tissue of the prickle resembling abscission zone than the one beneath it.
Keywords:rose  prickle  anatomical structure  abscission zone  chemical composition
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