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中国木犀属植物叶表皮形态
引用本文:许炳强,夏念和,王少平,郝刚.中国木犀属植物叶表皮形态[J].武汉植物学研究,2007,25(1):1-10.
作者姓名:许炳强  夏念和  王少平  郝刚
作者单位:1. 中国科学院华南植物园,广州,510650
2. 华南农业大学生命科学学院,广州,510642
基金项目:广东省数字植物园重点实验室基金;华南农业大学校科研和教改项目
摘    要:应用光学显微镜和扫描电子显微镜对中国木犀属(Osmanthus)4组20种植物的叶表皮微形态进行了观察研究。发现该属植物叶上、下表皮细胞近相似,不规则或多边形,上表皮无气孔器,气孔器为环列型,放射状细胞型,短平列型、环列型及其过渡类型。气孔外拱盖表面多平滑,或具有颗粒状纹饰,拱盖内缘平滑,波状或不规则。气孔通常下陷,两端加厚或不加厚,周围角质膜通常增厚成环状包着气孔,上具绳索状条纹或光滑。表面蜡质纹饰常为颗粒状、鳞片状、块状、毛状、绳状或稍平滑。柊树气孔外拱盖边缘具明显的针晶,与其它种不同。腺体存在于叶的上、下表面,性状不稳定,其分类学意义不明显。木犀属叶表皮垂周壁式样、气孔器类型、气孔密度都有很大的变异,与属下分组有一定的对应性,并在组间表现出一定的演化关系。

关 键 词:木犀属  叶表皮  形态  中国
文章编号:1000-470X(2007)01-0001-10
收稿时间:2006-07-19
修稿时间:2006-07-192006-09-13

Leaf Epidermal Morphology of Osmanthus(Oleaceae)from China
XU Bing-Qiang,XIA Nian-He,WANG Shao-Ping,HAO Gang.Leaf Epidermal Morphology of Osmanthus(Oleaceae)from China[J].Journal of Wuhan Botanical Research,2007,25(1):1-10.
Authors:XU Bing-Qiang  XIA Nian-He  WANG Shao-Ping  HAO Gang
Institution:1. South China Botanical Garden, The Chinese AcademyofSciences, Guangzhou 510650, China; 2. College of Life Sciences, South China Agricultural University, Guangzhou 510642, China
Abstract:The leaf epidermis structures of 20 species from the 4 groups of the genus Osmanthus were observed under light microscope(LM) and scanning electron microscope(SEM).The epidermis cells of both upper and lower leaf surfaces are polygonal or irregular in shape and the anticlinal walls are straight,arched,sinuolate or sinuate.Stoma apparatuses occur only on abaxial surface of the leaf,with the types of cyclocytic,actinocytic,brachyparacytic,cyclocytic,or any transitional ones.The ornamentation of the outer stomatal ledge(or rim) is smooth,or granular.However,the inner margin of stomatal ledge is smooth,or sinuolate,or irregular.Raphides like a ring and radials exist on the margin of the outer stomatal ledge(or rim) in O.heterophyllus,which differ from other species.Gland exists on lower and upper epidermises,with more on the lower.The characteristic of gland,probably due to its stages of maturity,is unstable,so its significance in systematics is unclear.The shapes of anticlinal walls,the types of the stomatal apparatuses,and the stomatal indexes vary significontly between these groups associated with the sectional division in Osmanthus,which also reveal some morphological evolving trends among the groups.
Keywords:Osmanthus  Leaf epidermis  Morphology  China
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