麦角生物碱在醉马草内生真菌共生体中的空间分布

Spatial variation of ergot alkaloids in drunken horse grass infected by Neotyphodium gansuense

本研究检测了2007年9月采自新疆哈密(HM)、青海铁卜加(TBJ)、甘肃肃南(SN)、甘肃天祝(TZ)、甘肃夏河(XH)5个不同地理种群的醉马草内生真菌共生体的麦角生物碱含量,结果表明,醉马草种群内不同器官中麦角新碱及麦角酰胺含量均不同,且麦角新碱的含量均显著高于麦角酰胺的含量(P<0.05)。5个种群间麦角酰胺、麦角新碱及总生物碱的含量除叶鞘外,均以HM最高,分别为53.656,117.784和160.816 mg/kg干重。相关性分析表明,植株叶片、茎秆和果穗麦角酰胺、麦角新碱及总生物碱的含量均与种群生长的年均温度呈正相关关系。

Ergot alkaloids were detreeted in drunken horse grass （Achnatherum inebrians）- Neotyphodium gansuense endophyte symbionts taken from 5 different geographical sites： Hami in Xinjiang （HM）, Tiebujia in Qinghai （TBJ）, Sunan （SN）, Tianzhu （TZ） and Xiahe （XH） in Gansu in September 2007. Different ergine and ergonovine contents were found in different organs of drunken horse grass and the ergonovine contents were significantly greater than those of ergine （P〈0. 05）. The ergine, ergonovine and total alkaloid contents （53. 656, 117. 784 and I60. 816 mg/kg dry matter, respectively） were highest in plants from HM except in the leaf sheaths. Correlation analyses indicated that ergine, ergonovine and total alkaloid contents of leaf blades, stems and heads of plants were positively related to the annual average temperature.