蜡梅科植物次生木质部导管分子形态特征  

Morphological Characters of Vessel Elements in Secondary Xylem of Two Species from Calycanthaceae

作　　者：李红芳 薛成[3] 张小玲 Li Hongfang;Xue Cheng;Zhang Xiaoling(Xianyang Vocational Technical College,Xi'an,Shaanxi 712000,China;Weinan Vocational&Technical College,Weinan,Shaanxi 714000,China;State Key Laboratory of Systematic and Evolutionary Botany,Institute of Botany,Chinese Academy of Sciences,Beijing 100093,China;Tsinghua University High School-Qinhan,Xianyang,Shaanxi 712000,China)

机构地区：[1]咸阳职业技术学院,陕西西安712000 [2]渭南职业技术学院,陕西渭南714000 [3]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 [4]清华大学附属中学秦汉学校,陕西咸阳712000

出　　处：《广西林业科学》2022年第3期404-410,共7页Guangxi Forestry Science

基　　金：渭南市重点研发计划项目(2020ZDYF-JCYJ-231)。

摘　　要：为了解蜡梅科(Calycanthaceae)中国特有植物蜡梅(Chimonanthus praecox)和夏蜡梅(Calycanthus chinensis)导管分子及其穿孔板特征,利用扫描电子显微镜(SEM)对其次生木质部导管分子进行观察,首次展示电镜下蜡梅科植物导管分子的形态,并对其长度和直径进行统计学分析。结果表明,蜡梅和夏蜡梅导管分子穿孔板皆为单穿孔板;蜡梅穿孔板一般具尾,且尾较长;夏蜡梅不具尾的穿孔板较多,具尾穿孔板的尾长度中等。蜡梅与夏蜡梅的导管分子长度差异不显著,夏蜡梅导管分子直径显著大于蜡梅;两种植物导管分子的长度与直径均极显著相关。夏蜡梅导管分子的演化程度比蜡梅高。In order to know characters of vessel elments and perforation plates,morphological characters of vessel elements in secondary xylem of Chimonanthus praecox and Calycanthus chinensis,two genera and two species of Calycanthaceae,were observed by Scanning Electron Microscope(SEM).Morphology of vessel elements of Calycanthaceae plants under SEM was demonstrated for the first time.Lengths and diameters of vessel elements were analyzed by statistical analysis.Results showed that perforation plates in vessel elements of C.praecox and C.chinensis were simple.Perforation plates of C.praecox generally had long tails.Tailless perforation plates in C.chinensis were many,and most of tails in perforation plates were middle.There was no significant difference in vessel element length between two species.Vessel element diameter of C.chinensis was significantly larger than that of C.praecox.Lengths of vessel elements in two species were extremely related to diameters.Evolution level of vessel elements in C.chinensis was higher than that in C.praecox.

关 键 词：植物分类 扫描电镜 蜡梅科 导管 穿孔板 

分 类 号：Q944.66[生物学—植物学]