New Phenylpropanoid Glycosides from Illicium majus and Their Radical Scavenging Activities

Chemical investigation of the ethanol extract of the branch and leaves of Illicium majus resulted in the isolation of four new phenylpropanoid glycosides ( 1 – 4 ) and one new phenolic glycoside ( 9 ), along with 13 known ones. Spectroscopic techniques were used to elucidate the structures of the new isolates such as 3-[(2R,3S)-7-hydroxy-2-(4-hydroxy-3-methoxyphenyl)-3-(hydroxymethyl)-2,3-dihydro-1-benzofuran-5-yl]propyl β-D-glucopyranoside ( 1 ), [(2R,3S)-7-hydroxy-2-(4-hydroxy-3-methoxyphenyl)-5-(3-hydroxypropyl)-2,3-dihydro-1-benzofuran-3-yl]methyl 2-O-α-L-rhamnopyranosyl-β-D-glucopyranoside ( 2 ), [(2R,3S)-7-hydroxy-2-(4-hydroxy-3-methoxyphenyl)-5-(3-hydroxypropyl)-2,3-dihydro-1-benzofuran-3-yl]methyl 2-O-α-L-rhamnopyranosyl-β-D-xylopyranoside ( 3 ), 3-[(2R,3S)-3-({[2-O-(4-O-acetyl-α-L-rhamnopyranosyl)-β-D-xylopyranosyl]oxy}methyl)-7-hydroxy-2-(4-hydroxy-3-methoxyphenyl)-2,3-dihydro-1-benzofuran-5-yl]propyl acetate ( 4 ), and 4-(2-hydroxyethyl)phenyl 3-O-β-D-glucopyranosyl-β-D-glucopyranoside ( 9 ). Free radical scavenging activities of the isolates were elucidated through the DPPH assay method. The most active compounds, 1-O-caffeoyl-β-D-glucopyranose ( 17 ) and soulieana acid 1 ( 18 ), exhibited moderate radical scavenging activities (IC₅₀=37.7±4.4 μM and IC₅₀=97.2±3.4 μM, respectively). The antibacterial activities of the isolates against Staphylococcus aureus and Escherichia coli were also assessed, and no activity was shown at the measured concentration (<32 μg/mL).     

八角科植物的地理分布

本文依据八角科的系统分类和地理分布,结合古植物、古地理和古气候资料,分析和推论八角科的起源地点在劳亚古陆,很可能是在劳亚古陆中南部的温暖湿润山地。八角科的起源时间早于白垩纪末期,很可能在白垩纪中期。八角科的迁移扩散途径是沿山地进行,从西欧进入北美,从北往南,从内陆往沿海。世界现代八角科植物是以东亚成分为主,东亚的横断山至华东一带（２０—３０°Ｎ,９８—１２３°Ｅ）为八角科的现代分布中心、现代分化中心和东亚八角科现代原始类群分布中心。八角科曾为古热带湿润山地分布型,现代为东亚－北美分布型;现代分布格局形成的原因在欧美是因为海浸和冰川作用,在亚洲则是寒化（冰川）和旱化的综合作用,而物种丰富程度则是由于东亚较北美有更多的地理隔障机制。     

国产五味子科五种植物叶片脉序研究

首次报道了国产五味子科５种植物的叶脉特征,对科、属、种的特征作了描述,编排有分种检索表．通过与八角科叶脉的比较,支持建立五味子科与八角科的观点,认为五味子属的系统位置在南五味子属之后,并讨论了八角目的演化趋势     

A new species of Illicium subsection Parviflora (Illiciaceae) from the Massif de la Hotte, Haiti

Illicium hottense, a new species, is here described from the floristically diverse Massif de la Hotte of southern Haiti. It is compared to related species, especiallyI. ekmanii, with which it has previously been confused.Illicium hottense andI. ekmanii are members ofIllicium subsectionParviflora, a group that comprises four species, all endemic to peninsular Florida (I. parviflorum) or the Greater Antilles: Cuba (I. cubense) and Hispaniola (I. ekmanii, andI. hottense). The subsection is characterized by its distinctive laminar-carnose, ovoid stamens; all have trisyncolpate pollen.Illicium hottense is similar toI. ekmanii andI. parviflorum in having flowers with ten to thirteen carpels and six to less commonly eight stamens, but differs from both in its strongly papillose outer tepals and consistently acute leaves. In addition, its leaves lack the strong anise fragrance ofI. parviflorum. Finally, molecular data provide support for recognizingI. hottense as a species distinct fromI. ekmanii.     

The Causes of self-sterility in natural populations of the relictual angiosperm, Illicium floridanum (Illiciaceae)

BACKGROUND AND AIMS: Illicium floridanum, a species belonging to the basal extant angiosperm taxon Illiciaceae, reportedly exhibits self-incompatibility (SI). To date, the site and timing of SI within the carpel of this species remains unidentified. Thus, the objective of this research was to determine the cellular and temporal aspects of SI in I. floridanum. METHODS: Following controlled application of cross- and self-pollen in natural populations of I. floridanum, embryo sac development and temporal aspects of stigma receptivity, as well as pollen tube growth, fertilization, and embryo and endosperm development, were investigated with the aid of light and fluorescence microscopy. KEY RESULTS: Flowers of I. floridanum exhibited complete dichogamy whereby stigmas only supported cross- and self-pollen tube growth prior to anther dehiscence. In contrast to earlier reports of SI in this species, a prezygotic SI resulting in rejection of self-pollen tube growth at the stigma was absent and there were no significant differences between cross- versus self-pollen germination and pollen tube growth within the style and ovary during the first 5 d after pollination. Structural development of the four-celled embryo sac was not differentially influenced by pollen type as noted to occur in other angiosperms with late-acting ovarian SI. The ovule micropyle and embryo sac were penetrated equally by cross- and self-pollen tubes. In addition, there were no statistically significant differences in cross- versus self-fertilization. A resting zygote and multicellular endosperm at a variety of developmental stages was present by 30 d after application of cross- or self-pollen. CONCLUSIONS: In the clear absence of a prezygotic SI that was previously reported to result in differential self-pollen tube growth at the stigma, self- sterility in I. floridanum is likely due to early-acting inbreeding depression, although late-acting post-zygotic ovarian SI cannot be ruled out.     

Observations on the vegetative anatomy of Austrobaileya: habital, organographic and phylogenetic conclusions

For the single species of Austmbaileya (Austrobaileyaceae), quantitative and qualitative data are offered on the basis of a mature stem and a root of moderate diameter. Data available hitherto have been based on stems of small to moderate diameter, and roots have not previously been studied. Scanning electron microscope (SEM) photographs are utilized for roots, and show compound starch grains. Roots lack sclerenchyma but have relatively narrow vessels and abundant ray tissue. Recent phylogenies group Austrobaileyaceae with the woody families Illiciaceae, Schisandraceae, and Trimeniaceae (these four may be considered Illiciales), and somewhat less closely with the vesselless families Amborellaceae and Winteraceae and the aquatic families Cambombaceae and Nymphaeaceae. The vessel-bearing woody families above share vessels with scalariform perforation plates; bordered bars on plates; pit membrane remnants present in perforations; lateral wall pitting of vessels mostly alternate and opposite; tracheids and/or septate fibre-tracheids present; axial parenchyma vasicentric (sometimes abaxial); rays Heterogeneous Type I; ethereal oil cells present; stomata paracytic or variants of paracytic. Although comparisons between vessel-bearing and vesselless families must depend on fewer features, Amborellaceae and Winteraceae have no features incompatible with their inclusion in an expanded Illiciales.     

Brevistylumsides A and B,diterpene glycosides from Illicium brevistylum

A phytochemical investigation of 80% ethanol extract of Illicium brevistylum (Illiciaceae) resulted in the isolation of two new diterpene glycosides (1 and 2), together with three known diterpenes (3–5). The structures of the new compounds were deduced on the basis of comprehensive spectroscopic analysis including IR, HR-ESI–MS, ¹H NMR, ¹³C NMR, DEPT, COSY, HMBC and HSQC. The structures of known compounds 3–5 were identified by comparison of their spectral data with those reported in the literature.     

假地枫皮中二萜酸类化合物研究

从八角属植物假地枫皮的石油醚提取物中分离出5个二萜酸类化合物,经波谱数据分析(^1H NMR、^13C NMR、^1H-^1H COSY、NOESY、HSQC和HMBC),分别鉴定为4-epi-dehydroabietic acid(1)、4-epi-sandaraeopinaric acid(2)、4-epi-abietic acid(3)、4-epi-isopimaric acid(4)和8,11,13,15-abietatetraen-19-oic acid(4)。     

湖南植物志资料（一）木兰科、八角科、五味子科、樟科、水马齿科补遗

本文报道了湖南植物新记录共计１１种,隶属于５科１０属．归并樟科植物３种２变种：将石木姜子ＬｉｔｓｅａｆａｂｅｒｉＨｅｍｓｌ．和近轮叶木姜子Ｌ．ｓｕｂｖｅｒｔｉｃｉｌｌａｔａＹａｎｇ归入黄丹木姜子Ｌ．ｅｌｏｎｇａｔａ（Ｗａｌｌ．ｅｘＮｅｅｓ）Ｂｅｎｔｈ．ｅｔＨｏｏｋ．ｆ．,将长梗绒楠ＭａｃｈｉｌｕｓｖｅｌｕｔｉｎａＣｈａｍｐ．ｅｘＢｅｎｔｈ．ｖａｒ．ｌｉｎｇｉｐｅｄｕｎｃｕｌａｔａＣ．Ｊ．Ｑｉ归入绒毛润楠Ｍ．ｖｅｌｕｔｉｎａＣｈａｍｐ．ｅｘＢｅｎｔｈ．,将短梗新木姜子ＮｅｏｌｉｔｓｅａｂｒｅｖｉｐｅｓＨ．Ｗ．Ｌｉ归入美丽新木姜子Ｎ．ｐｕｌｃｈｅｌｌａ（Ｍｅｉｓｓｎ）Ｍｅｒｒ．,将紫云山新木姜子Ｎ．ｗｕｓｈａｎｉｃａ（Ｃｈｕｎ）Ｍｅｒｒ．ｖａｒ．ｐｕｂｅｎｓＹａｎｇｅｔＰ．Ｈ．Ｈｕａｎｇ归入巫山新木姜子Ｎ．ｗｕｓｈａｎｉｃａ（Ｃｈｕｎ）Ｍｅｒｒ．．     

假地枫皮的订正

作者查阅了全国42个标本馆所收藏的403号假地枫皮Illicium jiadifengpi B.N.Chang标本, 确认该种植物为中国特有, 分布于安徽、浙江、江西、福建、湖北、湖南、广东和广西。将百山祖八角I.jiadifengpi B.N.Changvar.baishanense B.N.Chang et S.H.Ou归并到假地枫皮;将闽皖八角I.minwanense B.N.Changet S.D.Zheng作为假地枫皮的一个变型--紫花八角I.jiadifengpi B.N.Changf.minwanense(B.N.ChangetS.D.Zhang)Q.Lin, 将武夷八角I.wuyishanum Q.Lin归并到紫花八角中。