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71.
CAO Li-Min WANG Zhi-Xin CAO Ming LIU Jian-Hui LIN Qiong JIA Nian-He 《Plant Diversity》2014,36(4):419-432
Leaf venation of 27 species representing 25 genera of Sapindaceae (sstr.) of China was investigated for the first time. The pinnate venation pattern in most species is either camptodromous, or craspedodromous. Three types of leaf blade margin were observed, ie., entire, toothed and partite. The secondary veins are branched or unbranched. Most species have intersecondary veins. The tertiary veins of most species are reticulate and percurrent. The areoles are regular or irregular. Veinlets are simple, branched or absent. The delimitations of Xanthoceroideae and Lepisanthes sensu lato are supported by leaf venation characters. The close relationships among Dimocarpus, Litchi and Nephelium are supported by the evidence from leaf venation. A key to the species of Sapinaceae based on leaf venation characters is presented. 相似文献
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Chemical investigation of the methanol extract of the leaves of Caledonian Guioa crenulata led to the isolation and characterisation of four farnesyl diglycosides, crenulatosides A, B, C and D, along with three known flavonol glycosides and one known trimeric proanthocyanidin possessing a doubly linked structure. The structures of these compounds were determined on the basis of spectroscopic studies and chemical evidence. The ethanol and ethyl acetate extracts of the leaves exhibited no cytotoxic activity and no inhibition of acetylcholinesterase. 相似文献
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无患子中两个新的大戟烷型三萜皂甙 总被引:2,自引:0,他引:2
从无患子科无患子(Sapindus mukorossi Gaertn.)根中分离到两个新的大戟烷型三萜皂甙SapimukosideA(1)和SapimukosideB(2)。运用波谱和化学方法鉴定它们的结构为3-O-α-L鼠李吡喃糖基-(1→2)-[α-L-阿拉伯吡喃糖基-(1→3)]-β-D-葡萄吡喃糖基-21,23R-epoxyl tirucall-7,24R-diene-3β,21-diol(1)和3-O-α-L-鼠李吡喃糖基-(1→6)-β-D-葡萄吡喃糖基21,23R-epoxyl tirucall-7,24R-diene-3β,21-diol(2)。 相似文献
75.
从无患子科无患子(Sapindus mukorossi Gaertn.)根中分离到两个新的大戟烷型三萜皂甙Sapimukoside A (1) 和Sapimukoside B (2).运用波谱和化学方法鉴定它们的结构为3-O-α-L-鼠李吡喃糖基-(1→2)-[α-L-阿拉伯吡喃糖基-(1→3)]-β-D-葡萄吡喃糖基-21, 23R-epoxyl tirucall-7, 24R-diene-3β, 21-diol (1) 和3-O-α-L-鼠李吡喃糖基-(1→6)-β-D-葡萄吡喃糖基21, 23R-epoxyl tirucall-7, 24R-diene-3β, 21-diol (2). 相似文献
76.
该文续报道胡麻科、桑寄生科等科7个分类单位。胡麻科的茶菱属和茶菱均为广东新记录。云南槲寄生、锈毛钝果寄生和枫香钝果寄生均为海南新记录。《海南植物志》第二卷记载的五蕊桑寄生(产于琼中),现订正琼中的标本应为枫香钝果寄生,海南不产五蕊寄生属植物。大戟科的子弹枫现已成为广西和广东的归化种。无患子科的雅旗是我国新引种的经济植物。 相似文献
77.
HIROSHI TOBE PETER H. RAVEN F.M.L.S. 《Botanical journal of the Linnean Society. Linnean Society of London》1995,118(4):261-274
We present the first extensive study of embryology of Akania , the only genus of Akaniaceae (one of the 15 glucosinolate-producing families). Akania has a distinctive combination of embryological features, which includes bitegmic and crassinucellate ovules; thick, multiplicative and vascularized outer integument; a Polygonum-type embryo sac; albuminous seed; 'exotestal' seed coat with a palisade of columellar, thick-walled cells and a thick and sclerotic mesotesta with the inner tissue aerenchymatous. A comparison of its embryological characteristics with those of some other groups indicates that Akania closely resembles Bretschneideraceae (another glucosinolate-producing family) and Sapindaceae, but it retains some archaic embryological features and is best treated as a separate family in or near Sapindales, as in most modern general classifications. Based on evidence from embryological and other data, Akaniaceae appear to be the sister group of Bretschneideraceae, possibly near to Sapindales. With the data at hand, we cannot fully assess the recent suggestion that Akaniaceae-Bretschneideraceae are a basal group in Capparales. 相似文献
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