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Yan Xing Hong-yun Peng Xia Li Meng-xi Zhang Ling-ling Gao Xiao-e Yang 《Journal of Zhejiang University. Science. B》2012,13(10):839-845
The active metabolite in the post-harvested biomass of zinc(Zn) and cadmium(Cd) hyperaccumulator Sedum alfredii Hance from phytoextraction is of great interest in China.The current study demonstrates that a salidroside-type metabolite can be yielded from the Zn/Cd hyperaccumulator S.alfredii biomass by means of sonication/ethanol extraction and macroporous resin column(AB-8 type) isolation.The concentrations of Zn and Cd in the salidroside-type metabolite were below the limitation of the national standards. 相似文献
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通过对菌落特征的观察,从油泥中筛选出一株区别于校园土壤中的放线菌;并通过对两菌株摇瓶发酵代谢产物的核磁共振氢谱比较,为后续研究的深入提供理论依据.结果表明,从油泥和校园土壤中分离纯化的两菌株其菌落都与培养基牢固结合、不透明、较干燥、正反颜色不同,有泥腥味.但菌落正面"干粉"前者呈浅灰色,而后者呈白色;菌落反面呈棕褐色,前者明显深于后者;核磁共振氢谱表明两种菌的代谢产物有明显差异.因此,不同环境中的放线菌菌落特征有差异,其色泽表现出对环境的适应;其代谢产物也有差异. 相似文献
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Fu-sheng Zhang Ya-li Lv Yue Zhao Shun-xing Guo 《Journal of Zhejiang University. Science. B》2013,14(9):785-792
Anoectochilus formosanus, commonly known as “Jewel Orchid”, is a Chinese folk medicine used to treat hypertension, diabetes, and heart disease. The existence of A. formosanus is currently threatened by habitat loss, human and animal consumption, etc. The highly potent medicinal activity of A. formosanus is due to its secondary metabolites, especially kinsenosides and flavonoids. This orchid also has a unique mycorrhizal relationship. Most adult orchids rely on endophytes for mineral nutrition and have complex interactions with them, which are related to plant growth, yield and changes in secondary metabolites. This study investigated the promoting role of F-23 fungus (genus Mycena) on the biomass and contents of kinsenosides and flavonoids of A. formosanus in pot culture. The following were observed after 10 weeks of symbiotic cultivation: increased shoot height, shoot dry weight, and leaf numbers by 16.6%, 31.3%, and 22.5%, respectively; increased contents of kinsenosides, isorhamnetin-3-O-β-d-rutinoside, and isorhamnetin-3-O-β-d-glucopyranoside by 85.5%, 226.1%, and 196.0%, respectively; some hyphae in epidermal cells dyed red and/or reddish brown by safranine; and, significantly reduced number of starch grains in cortical cells. Moreover, F-23 fungus significantly improved the kinsenoside and flavonoid contents of A. formosanus. These findings supported the reports that endophytes can alter the production of secondary metabolites in their plant hosts, although further physiological, genetic and ecological analyses are warranted. 相似文献
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植物组织培养的应用及存在问题 总被引:6,自引:0,他引:6
本文介绍了植物组织培养技术在快速繁殖、植物育种、人工种子、种质保存及次生代谢物生产等方面的应用及取得的进展,指出植物组织培养中存在的问题并提出了相应的解决方法。 相似文献
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Seshadri developed many reagents and synthetic procedures which he used for elucidation and synthesis of natural products,
in particular flavonoids. 相似文献
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