国产新月蕨属叶表皮微形态特征及其系统学意义  

The Leaf Micromorphology of Domestic Fern Genus Pronephrium from China and Its Taxonomic Significance

作　　者：王文彬 段华娟 陈春发 张宪春[2] 李中阳[1] WANG Wenbin;DUAN Huajuan;CHEN Chunfa;ZHANG Xianchun;LI Zhongyang(School of Life Sciences,Gannan Normal University,Ganzhou 341000,China;State Key Laboratory of Systematic and Evolutionary Botany,Institute of Botany,Chinese Academy of Sciences,Beijing 100093,China)

机构地区：[1]赣南师范大学生命科学学院,江西赣州341000 [2]中国科学院植物研究所系统与进化植物学国家重点实验室,北京100093

出　　处：《赣南师范大学学报》2021年第3期105-113,共9页Journal of Gannan Normal University

基　　金：国家自然科学基金项目(31500169)。

摘　　要：运用光学显微镜和扫描电镜,对国产金星蕨科中的新月蕨属以及其近缘类群毛蕨属的共11个物种的叶表皮微形态特征进行了观察.结果表明:新月蕨属植物叶表皮的微形态特征,在种内较为稳定,并可为探讨新月蕨属的属下分类提供依据.在光学显微镜下,11个种叶表皮形态特征较为一致,上、下表皮的细胞形状均为不规则型,垂周壁均为深波状,气孔器形状也均为椭圆形.气孔器的大小在种间相差较大,而种内差异较小.气孔器类型有极细胞型,腋下细胞型,共环极细胞型,聚腋下细胞型和不规则型5种,并具有明显的种间差异.在扫描电镜下,气孔外拱盖全为脊状凸起,上、下表皮细胞的空间排列情况,保卫细胞两极“T”型加厚特征,气孔的突起程度等方面都有一定种间差异.但这几种电镜特征,在个别种中也存在一定的种内差异.综合光学显微镜和扫描电镜下的特征,可以较好地支持前人对新月蕨属这11个种划分为4个组的处理,并与传统形态分类和系统发育结果具有较高的一致性.11 species of genus Pronephrium(Thelypteridaceae)and its related genus Cyclosorus from China were observed under Light Microscope(LM)and Scanning Electronic Microscope(SEM).The results show that,the micromorphology of Pronephrium show great infraspecific unity,and can provide evidence for infrageneric taxonomy.Under LM,the epidermal cells of the 11 species were irregular shape,with sinuate anticlinal walls and elliptical stomata.The major stomatal apparatus types are polocytic type,axillocytic type,copolocytic type,coaxillocytic type and anomotetracytic type,with distinct interspecific differences.Under SEM,Outer stomatal ledge are all ridged,and arrangement of epidermal cells,“T”pieces at two polar regions of cells,stomatal convexity and concavity all have certain interspecific differences,and sometimes infraspecific differences.The results from LM and SEM observation generally support the division of 11 species into 4 sections,which conforms to the taxonomy and phylogeny study.

关 键 词：叶表皮 气孔 光学显微镜 扫描电镜 新月蕨属 系统学 

分 类 号：Q949[生物学—植物学]