%0 Journal Article
%T Characters of Leaf Epidermis in Hamamelidaceae (s. l.)<br>金缕梅科(广义)的叶表皮特征
%A Pan Kai-Yu
%A Lu An-Ming
%A Wen Jie
%A <br>潘开玉
%A 路安民
%A 温洁
%J 中国科学院研究生院学报
%D 1990
%I 
%X Observed under LM in the present work were epidermal cells and stomatal apparatuses of mature leaves in 37 species (50 samples) belonging to 19 genera and 6 sub- families (Hamamelidaceae), of which 35 species (19 genera, 6 subfamilies) were also used for observing under SEM cuticular membrane and wax sculpture, shape of stomata and stucture of stomatal apparatuses of the lower epidermis.        (1)  It is found that in the family cells of both upper and lower epidermis are tetragonal, pentagonal and hexagonal or irregular; anticlinal walls are straight, arched, sinuolate and sin- uate; stomatal apparatuses, which occur only on the lower surface, may be cyclocytic, stephano- cytic, paracytic and anomocytic.  All these characters of the leaf epidermis are of systematic significance in the family (Fig. 1).        (2)  Types of stomatal apparatuses are correlated to a certain extent with the pattern of anticlinal walls of epidermal cells and other external morphological characters. In the majority of cases, the groups, whose stomatal apparatuses are cyclocytic (Exbucklandioideae and Rhodo- leioideae) and stephanocytic (Mytilaria Lec. and Tetrathyrium Benth.), all have straight or arched anticlinal walls of lower and upper epidermal cells (except for Exbucklandia tonkin- ensis with sinuate anticlinal walls of both upper and lower epidermal cells, and E. longipetala with sinuate anticlinal walls of upper epidermal cells) (Plate 1:12, 13; 2:4), are all evergreen trees or shrubs, and all have palmate veins and simple hairs (but Rhodoleioideae is pinnate- veined or obscurely trinervious and has tufted hairs), indefinite floral parts and numerous ovu- les,  while the groups, whose stomatal apparatuses are paracytic  (Disanthoideae, Chunia H. T. Chang, Liquidambaroideae and Hamamelidoideae, which also has anomocytic type in small portion of species) (Table 2), have sinuolate or sinuate anticlinal walls of upper and lower epidermal cells (except for Chunia, Tetrathyrium, Corylopsis brevistyla and C.   willmotiae, which have straight and arched anticlinal walls), are mostly deciduous trees and shrubs, and have pinnate veins and tufted hairs in most species, usually tetra-, or pentamerous flowers (ex- cept for Liquidambaroideae, which has indefinite floral parts) and usually single ovule (but Disanthoideae and Liquidambaroideae have numerous ovules).      (3)  The subfamily Liquidambaroideae possesses polyporate pollen grains (Chang 1958, 1979), a circular vascular system in the midrib, at the centre of which is situated a secretory channel (Huang 1982, 1986) and leaf teeth of the unique Altingioid tooth type (Li 1988) etc. Based on these characters some authors tend to support the separation of the subfamily as a family, Altingiaceae.  The subfamily, however, shows strong differentiation of characters. For example, in the subfamily, there are both evergreen and deciduous trees, palmate and pinnate leaf veins, capitate, short-spicate and racemose inflorescence
%K Hamamelidaceae
%K Leaf epidermis
%K Stomatal apparatuses<br>金缕梅科
%K 叶表皮
%K 气孔器
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=B5EDD921F3D863E289B22F36E70174A7007B5F5E43D63598017D41BB67247657&cid=B47B31F6349F979B&jid=67CDFDECD959936E166E0F72DE972847&aid=0CBCE167EFB2D39D354797459F363D5A&yid=8D39DA2CB9F38FD0&vid=D3E34374A0D77D7F&iid=CA4FD0336C81A37A&sid=F3090AE9B60B7ED1&eid=96C778EE049EE47D&journal_id=1002-1175&journal_name=中国科学院研究生院学报&referenced_num=4&reference_num=0