柳属的叶表皮微形态特征及其分类学意义
Leaf Epidermal Microfeatures of Salix （Salicaceae） under Scanning Electronic Microscope and Its Taxonomical Significance
查看参考文献26篇
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文摘
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研究了29种柳属（Salix）植物在扫描电镜下的叶表皮微形态特征。结果表明：柳属的角质层蜡质纹饰可以划分为：痂状蜡质层，壳状平滑蜡质层，具凸起颗粒的蜡质层，具颗粒的蜡质层，锥形纤维体和鳞片状纤维体6种类型。其中锥形纤维体和鳞片状纤维体均为柳属所特有的蜡质类型，后者为前者的变型，这两种蜡质纹饰类型多见于较为进化的皱纹柳亚属和黄花柳亚属，故推测其可能为柳属中较为进化的性状。研究还发现气孔有外拱盖扁平和隆起呈脊状2种类型。而气孔外拱盖内缘为浅波状的类型仅见于高山和北极的类群中，因而推测该类型可能同高山和极地的低温等环境有关。气孔外拱盖的形态及其角化的情况以及蜡质类型是稳定的鉴别特征，对于柳属植物，尤其是一些表型相似的种类有很好的鉴别作用，但对于组、亚属的界定作用不大。 |
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其他语种文摘
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This paper presents the leaf epidermal microfeatures of 29 Salix species examined under scanning electronic microscope. Our results shown that the wax layer of Salix can be further divided into 6 types, crust （present in S. cardiophyUa, S. exigua, S. matsudana, S. clathrata, S. flabellaris, S. sinica, and S. gordejevii）, layers with raised granules （present in S.paralesia, S. babylonica, S. myrtillaceae, and S. lindleyana）, smooth film （present in S. tetrasperma, S. pentandra, S. maccalliana, S. polaris, S. polyodenia, S. turczaninowii, and S. berberifolia）, granules （present in S. brachista, S. rotundifolia）, conicoids （present in S. magnifica, S. flabellaris, S. oreophiUa, S. souliei, S. arctica, S. sinica, S. variegate, S. cheilophila, and S. gordejevii）, and scale-like conicoids （present in S. triandra, S. alatavica, and S. hastata）. Among them, the subtype of cale-like conicoids and coicoids were found only in both subgenus Chamaetia and subgenus Salix, two relatively advance subgenera in the genus Salix, so we speculate that conicoide is probably an advanced microfeature. We also found the inner margin of outer stomatal ledge was mostly smooth and seldom sinuous, and the later was observed only in the alpine and arctic Salix species. The morphology and keratinized of outer stomatal ledge together with wax morphology were relatively constant and quite useful for distinguishing species with similar phenotypes, but little valuable in the discrimination at section or subgenus level. |
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来源
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云南植物研究
,2008,30(1):38-46 【核心库】
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关键词
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柳属
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叶表皮
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扫描电镜
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微形态特征
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分类学意义
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地址
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中国科学院昆明植物研究所, 生物多样性与生物地理学重点实验室, 云南, 昆明, 650204
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0253-2700 |
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学科
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植物学 |
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基金
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国家自然科学基金
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文献收藏号
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CSCD:3205514
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