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Leroy L. Creasy 《Phytochemistry》1974,13(8):1391-1394
Low temperature inductive treatment of resting Euonymus plants sequentially resulted in the loss of chlorophyll, an increase in carbohydrate content, an increase in the activity of phenylalanine ammonialyase followed by an accumulation of cinnamic acids and flavonols and finally by the accumulation of flavolans and anthocyanins. These changes were contrasted with changes resulting from low temperature treatments of actively growing plants which are physiologically not capable of the sequence leading to normal autumn coloration. 相似文献
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Microtropis macrocarpa C.Y. Cheng & T.C. Kao has been treated as a synonym of Microtropis macrophylla Merr. & Freeman in most taxonomic reports in China. According to our study, M. macrocarpa is an independent species endemic to Yunnan, China. Microtropis macrophylla and Microtropis pachyphylla Merr. & Freeman should be treated as synonyms of Microtropis longifolia Wall. ex Kurz. M. macrocarpa is also identified as a critically endangered species, CR B lab (i,ii,iii,v), based on the IUCN Red List Categories and Criteria. The foliar surface, anther and pollen structures were also observed with a scanning electron microscope. 相似文献
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Plants in the genus Tripterygium, such as Tripterygium wilfordii Hook.f., have a long history of use in traditional Chinese medicine. In recent years there has been considerable interest in the use of Tripterygium extracts and of the main bioactive constituent, the diterpene triepoxide triptolide (1), to treat a variety of autoimmune and inflammation-related conditions. The main mode of action of the Tripterygium extracts and triptolide (1) is the inhibition of expression of proinflammatory genes such as those for interleukin-2 (IL-2), inducible nitric oxide synthase (iNOS), tumor necrosis factor-alpha (TNF-alpha), cyclooxygenase-2 (COX-2) and interferon-gamma (IFN-gamma). The efficacy and safety of certain types of Tripterygium extracts were confirmed in human clinical trials in the US and abroad. Over 300 compounds have been identified in the genus Tripterygium, and many of these have been evaluated for biological activity. The overall activity of the extract is based on the interaction between its components. Therefore, the safety and efficacy of the extract cannot be fully mimicked by any individual constituent. This review discusses the biochemical composition and biological and pharmacological activities of Tripterygium extracts, and their main bioactive components. 相似文献
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永瓣藤的分布现状及其保护 总被引:10,自引:0,他引:10
本文从自然环境、分布特征、种群数量和种群繁殖等方面研究了我国珍稀特有植物永瓣藤(Monimopetalum chinense)的分布和保护现状, 并从引种栽培、种子繁殖和无性繁殖等方面总结了近年来对永瓣藤进行迁地保存的初步研究结果, 最后提出了相应的保护建议。 相似文献
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卫矛科Celastraceae植物上已报道尾孢类真菌10种,其中包括假尾孢属Pseudocercospora真菌7种。在对中国尾孢类真菌的调查研究中,采集到寄生在冬青卫矛Euonymus japonicus上的3种假尾孢菌,其中2个为新种,即冬青卫矛假尾孢Pseudocercospora euonymi-japonici和北京假尾孢P. beijingensis。本文对这2个新种和Pseudocercospora cf. destructiva提供了形态描述、图及与近似种区别的讨论。采用ITS、tef1-α、act和rpb2 4个片段的序列构建了系统发育树。 相似文献
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卫矛科沟瓣属一新名称 总被引:1,自引:0,他引:1
印度支那植物志中有一个假卫矛属植物名称Microtropis poilanei。据其模式标本来看,该种显然不是假卫矛属Microtropis Wallich植物,而是沟瓣属Glyptopetalum Thwaites一新成员。由于种名Glyptope-talumpoilanei Tardieu已经合法发表,笔者根据其模式标本叶全缘的特点,提出新名称为全缘叶沟瓣Glypto-petalum integrifolium Q.W.Lin,Z.X.Zhang & Q.R.Liu。此外由于Microtro pispoilanei未合格发表,作者补充了新名称的拉丁描述。 相似文献
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