摘要
利用光学显微镜和扫描电镜对冬青属苦丁茶冬青(Ilex kudingcha C.J.T seng)与5个近缘种和一形态居间物种的叶表皮微形态特征进行了观察,结果显示:(1)7种冬青属苦丁茶植物的叶表皮微形态特征具有一定的相似性,如气孔器均位于下表皮,每种植物均有正常气孔器和大气孔器,气孔器类型均以环列型为主,其次为双环列型。(2)7种冬青属苦丁茶植物的差异性体现在叶表皮细胞的垂周壁形态和气孔外缘角质层纹饰等方面。(3)霍山冬青叶表皮微形态与华中枸骨存在着较大区别。(4)结合分子生物学证据与叶表皮特征,形态居间物种类型应为五棱苦丁茶的变种。研究认为叶表皮微形态特征具有种水平上的分类学意义,能够为苦丁茶冬青及其近缘种的划分提供可靠的依据。
Micro-morphological characteristics of leaf epdermis for Ilex kudingcha and its six relative species were examined with an optical microscope and SEM.（1）Micro-morphological structure of leaf epidermis for seven Ilexspecies as Kudingcha tea had a certain similarity such as the stomata at lower epidermis.According to the size of stomata,it could be divided into two typies of stomata：large stomata and common stomata.Most of stomatal type were cyclocytic.（2）There also had some differences in leaf epidermis characteristics,such as leaf epidermal cells and stomata anticlinal walls form,the outer edge of the cuticle ornamentation of stomata,etc.（3）There was a big difference in leaf epidermal morphology between I.huoshanensis and I.centrochinensis.（4）Combined with the evidence of molecular biology and the characteristics of the leaf epidermis,intermediate types should be treated as varieties of I.pentagona.The results proved that the characteristic of leaf epidermis of Ilex L.have taxonomic significance,it could be used as reliable evidence in distinguishing Ilex kudingcha with its related species.
出处
《西北植物学报》
CAS
CSCD
北大核心
2013年第9期1800-1807,共8页
Acta Botanica Boreali-Occidentalia Sinica
基金
国家自然科学基金(39860048
30060040)
关键词
苦丁茶冬青
近缘种
叶表皮
微形态特征
分类学意义
Ilex kudingcha
relative species
leaf epidermis
micro-morphological characteristics
taxonomical significance
