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中国蓼科植物花被片和果实形态结构及其系统学价值

花匠小妙招
2024-12-26 15:37

中国蓼科植物花被片和果实形态结构及其系统学价值

DOI: 10.11686/cyxb20150214, PP. 116-129

Keywords: 蓼科,花被片,果实,果皮,形态学,系统学

Abstract:

首次采用了外部特征的观察,果皮细胞分离及GMA半薄切片法,深入研究了中国蓼科9属、64种、2变种的花被片及果实的形态结构。结果显示花被片边缘全缘,微波状或锯齿状。三出脉,网状脉或羽状脉。脉序的特征在属内是稳定的。果实多为三棱,双凸镜和近球形。外果皮几乎全为石细胞,石细胞多为镶嵌或栅栏状排列,具7种类型:1)近椭圆形,细胞壁波状;2)长柱状,细胞壁波状弯曲;3)近长方形,细胞壁具突起;4)长圆柱形,细胞壁具突起;5)近长方形,细胞壁平直;6)近椭圆形,细胞壁具突起;7)长条形,细胞壁波状。蓼亚科具类型1~5,酸模亚科具类型6和7。外果皮和中果皮细胞有单宁。本研究为中国蓼科的分类提供花被片及果实结构的依据,为分子系统学揭示的蓼科不是一个自然的类群提供了形态学支持,并为进一步深入研究蓼科的系统学奠定了形态学基础。

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