Bongardia chrysogonum(L.)Spach:a valuable source for nutraceutical and pharmacological industries

Background:Bongardia chrysogonum(L.)Spach,also known as“Uruf-el-Deek”,has been used by rural communities for the treatment of various diseases and disorders,owing to its wide array of secondary metabolite compositions.Methods:The current study was conducted to determine the total polyphenolic content of Bongardia chrysogonum(L.)Spach as well as its potential free radical scavenging and metal-chelating antioxidant capacities.Its leaves,stems,and tubers were separately extracted using ethanol,water,and chloroform;their antioxidant activities were analyzed using in vitro models,including DPPH,ABTS,FRAP,and CUPRAC assays.The total polyphenolic content of the extracts was spectrophotometrically measured.Results:The richest polyphenolic content of the extracts was yielded by tuber chloroform and leaf ethanol extraction(215.09±0.53 mg/g extract as gallic acid equivalent and 240.74±1.12 mg/g extract as quercetin equivalent,respectively).Almost all of the tested extracts exhibited remarkable antioxidant activities,with the highest antioxidant capacity observed in the leaf extracts.On the other hand,the tuber ethanol extract demonstrated the weakest DPPH radical scavenging activity(%inhibition=49.75±0.38,P<0.01),while the tuber chloroform extract showed the weakest ABTS radical scavenging activity(%inhibition=62.61±0.06,P<0.05).These were closely followed by the tuber water extract(%inhibition=63.28±0.65,P<0.01).In terms of their FRAP and CUPRAC assays,the leaf ethanol extract was determined as the best one,with absorbance values of 3.64±0.01 and 2.22±0.01(P<0.01),respectively.Conclusion:Bongardia chrysogonum(L.)Spach possesses rich polyphenolic content and strong antioxidant activities.Thus,it could be a valuable source for the pharmaceutical industry in the prevention and treatment of diseases associated with oxidative stress.

玉兰属的研究

介绍了玉兰属 Yulania Spach分类简史 ,分析了玉兰属与木兰属 Magnolia L .的主要分类性状及其区别 ,阐述了药室纵裂方向、开花时期、花蕾顶生与腋生等性状的演化关系 ,提出玉兰属与木兰属是趋同演化的两个分类群 ,花先叶开放等性状是玉兰属的重要标志 ,中国暖温带是该属树种的起源中心、分布中心和多样性中心等新观点。确立玉兰属的系统位置 。

四川玉兰属两新种

描述了中国四川省木兰科玉兰属两新种,北川玉兰(Yulaniacarnosa D.L.Fuet D.L.Zhang sp. nov.)和时珍玉兰(Y.shizhenii D.L.Fuet F.W.Li sp.nov.)。两新种的独特特征是:北川玉兰每花具佛焰苞状苞片2枚,1枚膜质,着生在花梗中间,另1枚肉质,着生在花梗顶端。时珍玉兰花被片、雄蕊和雌蕊的花柱、柱头均为纯白色;雄蕊约20枚。两新种由傅大立于2001年3月在四川省发现并采集,模式标本存于中国林业科学研究院,模式标本号:北川玉兰No.200103141,时珍玉兰No.200103161。

河南玉兰属两新变种

发表河南玉兰属两新变种,即:①狭被望春玉兰(Yulania biondii(Pamp.)D.L.Fu var.angustitepalaD.L.Fu,T.B.Zhao et D.W.Zhao,var.nov.);②椭圆叶罗田玉兰(Y.pilocarpa(Z.Z.Zhao et Z.W.Xie)D.L.Fu var.ellipticifoliaD.L.Fu,T.B.Zhao et J.Zhao,var.nov.)。

锥叶中1个新的酚苷类化合物

目的 对壳斗科锥属植物锥Castanopsis chinensis叶的化学成分进行研究。方法 采用80%甲醇室温浸提取、石油醚脱脂,水层部分采用Sephadex LH-20、Diaion HP20SS及Toyopearl HW-40F柱色谱等方法进行分离纯化,根据化合物NMR、MS数据以及与文献对比鉴定其结构。结果 从锥叶中分离鉴定了11个化合物,分别为4′-O-β-D-吡喃葡萄糖基-3′,4′,5′-三羟基苯基咖啡酸酯(1)、5-O-咖啡酰奎宁酸(2)、5-O-阿魏酰奎宁酸(3)、咖啡酸甲酯(4)、没食子酸(5)、脱氢双没食子酸(6)、(2′R)-phaselic acid(7)、山柰酚(8)、槲皮素(9)、山柰酚-3-O-α-L-鼠李糖苷(10)、槲皮素-3-O-α-L-鼠李糖苷(11)。结论 所有化合物均为首次从锥中分离得到,其中化合物1为新化合物,命名为锥苷A。