Comparative study on development and structural characteristics of bracts and leaves of Tilia japonica Simonk
Peng Lin-Lin1, Xia Xiao-Fei3, Wang Ao1, Zhao Liang-Cheng1,2
1. School of Ecology and Nature Conservation, Beijing Forestry University, Beijing 100083, China;
2. Museum of Beijing Forestry University, Beijing 100083, China;
3. Beijing Museum of Natural History, Beijing 100050, China
Inflorescence bracts are the most typical characteristics of Tilia Linn., but their evolutionary relationship with other organs is not clear. In this study, correlations between the growth and development of bracts and leaves of Tilia japonica Simonk. were analyzed, and their epidermal micromorphological features and internal anatomical structures were compared. Results indicated that the growth and development processes of the bracts and leaves had very similar regularity. Both grew rapidly in the young stage, slowly in the middle stage, and only slightly in the mature stage. Analysis between the morphological characters of the bract and leaf showed significant correlations between bract length, bract width, leaf length, and leaf width. In addition, epidermal micromorphological features were very similar. Anatomically, compared with the leaf, there was no differentiation between palisade tissue and spongy tissue in the bracts. Combined with the fossil record of Tilia bracts, we suggest that the bract is specialized from the leaf and may be regarded as a leaf-like structure. The differences in epidermal micromorphological features and anatomical structures are mainly due to adaptations to their different functions during evolution.
彭林林, 夏晓飞, 王奥, 赵良成. 华东椴花序苞片和叶片发育及结构特征比较研究[J]. 植物科学学报, 2019, 37(6): 719-725.
Peng Lin-Lin, Xia Xiao-Fei, Wang Ao, Zhao Liang-Cheng. Comparative study on development and structural characteristics of bracts and leaves of Tilia japonica Simonk. Plant Science Journal, 2019, 37(6): 719-725.
[1] Engler A. Syllabus der Pflanzenfamilien[M]. Berlin:Borntraeger, 1921.
[2] Cronquist A. An Intergrated System of Classification of Flowering Plants[M]. New York:Columbia University Press, 1981.
[3] The Angiosperm Phylogeny Group. An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants:APGⅣ[J]. Bot J Linn Soc, 2016, 181:1-20.
[4] Pigott D. Lime-trees and Basswoods:A Biological Monograph of the Genus Tilia[M]. Cambridge:Cambridge University Press, 2012:1-10.
[5] 吴征镒, 汤彦承, 路安民, 陈之端, 李德铢. 中国被子植物科属综论[M]. 北京:科学出版社, 2003.
[6] Tang Y, Gilbert MG, Dorr LJ. Tiliaceae in Flora of China:Vol. 12[M]. Beijing:Science Press, 2007.
[7] 唐亚, 诸葛仁. 椴树属的地理分布[J]. 植物分类学报, 1996, 34(3):254-264. Tang Y, Zhu GR. Geographical distribution of Tilia Linn.[J]. Acta Phytotaxonomica Sinica, 1996, 34(3):254-264.
[8] Anderson GT. The pollination biology of Tilia[J]. Am J Bot, 1976, 63(9):1203-1212.
[9] Jones GN. Taxonomy of the American Species of Linden (Tilia)[M]. Urbana:University of Illinois Press, 1968, 39:1-156.
[10] Belin M, Éric Fernandez, Marull S, Fromageot C. Caractérisation histologique de la bractée inflorescentielle de Tilia cordata[J]. Acta Bot Gallica, 2013, 157(3):505-512.
[11] Wolfe JA, Wehr WC. Middle Eocene dicotyledonous plants from Republic, northeastern Washington[J]. U.S. Geological Survey Bulletin, 1987:1-25.
[12] Manchester SR. Inflorescence bracts of fossil and extant Tilia in north America, Europe, and Asia:patterns of morphologic divergence and biogeographic history[J]. Am J Bot, 1994, 81(9):1176-1185.
[13] 杨世杰, 汪矛, 张志翔. 植物生物学[M]. 3版. 北京:高等教育出版社, 2017.