花楸属3种1变种植物茎次生构造的比较  

Anatomical secondary structures of three species and one variety in the genus Sorbus L.

作　　者：杜婉 王丰 潘彪 陈昕[1] 

机构地区：[1]南京林业大学南方现代林业协同创新中心/生物与环境学院,南京210037 [2]南京林业大学材料科学与工程学院,南京210037

出　　处：《安徽农业大学学报》2017年第5期857-861,共5页Journal of Anhui Agricultural University

基　　金：江苏省自然科学基金(BK20141472);江苏省林业三新工程(LYSX[5015]42);江苏高校优势学科建设工程项目(PAPD)共同资助

摘　　要：以蔷薇科花楸属单叶的2种植物水榆花楸、棕脉花楸和复叶的1种1变种植物黄山花楸、少叶花楸为研究对象,对其次生木质部和次生韧皮部解剖构造进行了比较。结果表明,3种1变种花楸的次生木质部构造和次生韧皮部横切面细胞组成较为相似;木质部细胞形态和韧皮部细胞排列呈现出一定规律性差异。花楸属2种单叶植物的导管长度和木纤维长度均显著大于复叶种类,横切面上,2种单叶花楸属植物的韧皮纤维呈细带状分布而复叶的花楸属植物韧皮纤维则呈团状分布,单叶种类韧皮纤维的径向间隔远小于复叶种类。同时这3项指标的种间差异显著,为花楸属下类群划分及种间区分提供了一定的理论依据。A comparative study on anatomical secondary structures of three species and one variety in the genus Sorbus, including simple-leaved S. alnifolia, S. dunnii and compound-leaved S. amabilis, S. hupehensis var. paucijuga, was conducted in this paper. The results indicated that the secondary xylem structure and secondary phloem cell type were very similar among species. However, the xylem cell feature and phloem cell arrangement were significantly different in simple-leaved and compound-leaved species. The vessel and fiber length of xylem in simple-leaved species were significantly larger than those in compound-leaved ones. In addition, phloem fibers were distributed in bands with narrower radial intervals in simple-leaved species, while clustered with larger radial intervals in compound-leaved species. The vessel and fiber length in xylem and cell formulation in secondary phloem might be good references to distinguish simple-leaved and compound-leaved Sorbus speices for their sig- nificant variance.

关 键 词：花楸属 次生木质部 次生韧皮部 

分 类 号：Q944.55[生物学—植物学]