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根际微生物的代谢作用, 直接促进或抑制根的营养吸收和生长, 也影响根际土壤中的物质转化, 雷公藤根系发达且多与其他树种混交栽培, 其根际微生物活性对雷公藤的生长和土壤肥力均有不可忽视的影响。以福建省泰宁县3 种不同栽培模式雷公藤林(野生雷公藤林、杉木雷公藤混交林、厚朴雷公藤混交林)为研究对象, 通过稀释平板法测定3 种不同雷公藤林分根际土壤和非根际土壤中细菌、真菌、放线菌的数量。结果表明: 根际土的微生物数量大于非根际土的微生物数量; 3 种林分, 无论是在根际土壤中, 还是在非根际土壤中, 均表现为细菌数量>放线菌数量>真菌数量; 根际微生物(R)比非根际微生物(S)更活跃, 3 种林分的3 大类微生物的R/S 数量比值均大于1; 3 种林分的微生物活性表现为厚朴雷公藤混交林>杉木雷公藤混交林>野生雷公藤林, 表明混交方式可促进雷公藤根际微生物活性。 相似文献
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AIM: To investigate the effect of tripterygium hypoglaucum Hutch (THH) on collagen-induced arthritis (CIA) in rats and its possible mechanism. METHODS: SD rats were randomly divided into normal group and CIA group. The rat model of type Ⅱ CIA was successfully established and the model rats were randomly divided into 4 different groups: model group, dexamethasone group, THH (200 mg/kg) group, and THH (400 mg/kg) group. The contents of IL-12, IL-23 and IL-37 in the serum and foot paws of the CIA rats were detected by ELISA. The histopathological changes of the skin of the food paws were observed by HE staining. The protein expression of MMP-13 was determined by Western blot. The MMP-13 activity in the foot paws was detected by fluorescence labeling method. RESULTS: Compared with CIA group, THH at dose of 400 mg/kg significantly reduced the weight loss in type Ⅱ CIA rats (P<0.01). THH at dose of 400 mg/kg obviously decreased the contents of IL-12 by 28.31%, IL-23 by 41.57% in the serum and IL-12 by 30.78%, IL-23 by 39.46% in the foot paws, while IL-37 was significantly increased by 79.43% in the serum and 75.78% in the foot paws (P<0.01). The pathological changes of the subcutaneous tissues were improved by treating with THH (400 mg/kg). The protein expression of MMP-13 was significantly decreased by 31.82% (P<0.01), and the MMP-13 activity was also reduced. THH at dose of 200 mg/kg had no obvious improvement on the above indexes. CONCLUSION: THH has significant inhibitory effect on rat CIA by reducing the content of proinflammatory cytokines IL-12 and IL-23, increasing the content of anti-inflammatory factor IL-37, inhibiting inflammatory cell infiltration and vascular proliferation, and attenuating the protein expression of MMP-13 and MMP-13 activity in rats. 相似文献
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用雷公藤角斑病致病菌——福木假尾孢(Pseudocercospora elaeodendri)的培养液处理雷公藤(Tripterygium wilfordii)枝条,使得雷公藤体内保护酶增量表达,减弱膜脂过氧化作用,提高雷公藤的抗病性.结果表明40%福木假尾孢菌毒素为最佳处理浓度. 相似文献
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不同地理种源雷公藤的RAPD分析 总被引:1,自引:0,他引:1
应用RAPD技术,对25个不同地理种源的雷公藤进行了多态性分析。采用POP-GENE32软件对25个种源进行聚类分析,DPS(9.5)软件对所有个体进行聚类分析,并用UPGMA法对扩增DNA片段数据构建系统发育树。结果表明:多态性条带百分率为91.14%,Shannon's信息指数I=0.4472,Nei's基因多样性指数H=0.2973,观测等位基因数Na=1.911 4,有效等位基因数Ne=1.5120。这表明25个种源具有较高的遗传多样性水平,因此收集不同种源以保存尽可能多的遗传多样对于雷公藤的良种选育是非常有必要的。 相似文献
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雷公藤组培产物中雷公藤甲素和总生物碱含量的测定 总被引:5,自引:1,他引:4
建立了同一提取物中高效液相色谱法测定雷公藤甲素和紫外分光光度法测定雷公藤总生物碱含量的方法,样品用乙酸乙酯超声提取、过中性氧化铝柱,净化后用45%甲醇溶解,测定雷公藤的根皮、叶、雷公藤组培产物及培养液中雷公藤甲素和雷公藤总生物碱的含量。结果表明,雷公藤甲素的检测范围为1~100 μg/mL(R2= 0.999 9);雷公藤总生物碱在5~100 μg/mL范围内线性关系良好(R2=0.999 8);在同一提取液中,雷公藤甲素和雷公藤总生物碱的添加回收率分别为100.5%(RSD=0.63%)和99.8%(RSD=1.22%)。研究结果表明,根愈伤组织中雷公藤甲素含量为根皮粉中的1.25倍,培养液中雷公藤甲素产量占56%,总生物碱产量占65%。每生产1 g不定根培养物,雷公藤甲素产量为根皮粉中的10倍,雷公藤总生物碱产量为根皮粉中的2倍。 相似文献
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