沙芥属(Pugionium Gaertn.)植物子叶叶表皮微形态特征研究  

Micromorphology of Cotyledon Epidermis of Pugionium Gaertn.

作　　者：张凤兰[1,2] 郝丽珍[1,2] 杨忠仁[1,2] 胡宁宝[1,2] 王六英[3] 张进文[1,2] 

机构地区：[1]内蒙古农业大学农学院,呼和浩特010019 [2]内蒙古自治区野生特有蔬菜种质资源与种质创新重点实验室,呼和浩特010019 [3]内蒙古农业大学生态环境学院,呼和浩特010019

出　　处：《植物研究》2009年第5期524-528,共5页Bulletin of Botanical Research

基　　金：国家自然科学基金(30860174;30460080);内蒙古科技攻关项目(20050305;20060202);内蒙古自然科学基金(2001108020501;200308025013);内蒙古人才基金

摘　　要：采用扫描电镜观察了十字花科沙芥属二年生草本植物沙芥、斧翅沙芥、距果沙芥和宽翅沙芥的子叶表皮形态特征。其结果表明:沙芥属植物子叶上下表皮均有凸起的大的条形泡状细胞分布,呈平行排列,且每个种的上表皮的泡状细胞的密度均大于下表皮的泡状细胞密度,其中上下表皮的密度以沙芥的为最小,以宽翅沙芥为最大,且沙芥、距果沙芥和宽翅沙芥的下表皮的泡状细胞长度大于上表皮,而斧翅沙芥则相反;沙芥、斧翅沙芥与宽翅沙芥的叶片上下表皮细胞胞隆起,气孔下陷,而距果沙芥子叶上表皮的气孔生于表皮细胞下,表皮细胞未隆起,气孔下陷。该研究说明沙芥属植物子叶表皮微形态既有种间相似的特征,又存在一定的特异性,可为本属种间的分类及其抗逆机理提供形态学依据。The plants of Pugionium Gaertn, were biennial plants in Cruciferae, morphological characteristics of cotyledon epidermis of four species in Pugionium Gaertn. were investigated by using scanning electron microscope（SEM）. The results showed that the bulliform cell was distributed in adaxial-epidermis and abaxial-epidermis of Pugionium Gaertn. cotyledon, which was protuberant, large and parallel arraying, and its density in adaxial-epidermis was higher than that in abaxial-epidermis, and the density of P. cornutum （ L. ） Gaertn was minimum, the density of P. dolabratum var. was maximal, the length of the bulliform cell of P. dolabratum Maxim. in adaxial-epidermis was larger than that in abaxial-epidermis, but the rest was contrary. The P. cornutum （L.） Gaertn, P. dolabratum Maxim. and P. dolabratum var. platypterum. H. L. yang had ridgy epiderial cells in adaxial-epidermis and abaxial-epidermis, with sinking stoma, but guard cells of P. calcaratum Kom. were below the even epidemic cell, with sinking stoma. The study could clarify that the same characteristic of microstructure of cotyledon epidermis of Pugionium Gaertn, and the difference in species, so it could provide morphological evidence for stress resistance and taxonomy.

关 键 词：沙生蔬菜 沙芥属 子叶表皮 微形态特征 

分 类 号：S63[农业科学—蔬菜学]