分别以CS2和甲醇为溶剂，辅以超声波对先锋褐煤进行常温萃取，利用傅里叶变换红外光谱（FTIR）和气相色谱/质谱（GC/M S ）分析萃取物的组成及结构。结果表明，两种萃取物中共检测到124种有机化合物；CS2萃取物中烃类化合物相对含量较...分别以CS2和甲醇为溶剂，辅以超声波对先锋褐煤进行常温萃取，利用傅里叶变换红外光谱（FTIR）和气相色谱/质谱（GC/M S ）分析萃取物的组成及结构。结果表明，两种萃取物中共检测到124种有机化合物；CS2萃取物中烃类化合物相对含量较高，占CS2萃取物总量的52．08％，从C14～C30（除C23外）烷连续分布；甲醇萃取物中含氧和含氮化合物相对含量较高，分别占甲醇萃取物总量的39．28％和20．95％；此外还检测到多种生物标示物。展开更多
The co-evolution of Orobanche spp.and their hosts within the same environment has resulted in a high degree of adaptation and effective parasitism whereby the host releases parasite germination stimulants,which are li...The co-evolution of Orobanche spp.and their hosts within the same environment has resulted in a high degree of adaptation and effective parasitism whereby the host releases parasite germination stimulants,which are likely to be unstable in the soil.Our objective was to investigate whether extracts from non-host plants,specifically,Chinese medicinal plants,could stimulate germination of Orobanche spp.Samples of 606 Chinese medicinal herb species were extracted with deionized water and methanol.The extracts were used to induce germination of three Orobanche species;Orobanche minor,Orobanche cumana,and Orobanche aegyptiaca.O.minor exhibited a wide range of germination responses to the various herbal extracts.O.cumana and O.aegyptiaca exhibited an intermediate germination response to the herbal extracts.O.minor,which has a narrow host spectrum,showed higher germination rates in response to different herbal extracts compared with those of O.cumana and O.aegyptiaca,which have a broader host spectrum.Methanolic extracts of many Chinese herbal species effectively stimulated seed germination among the Orobanche spp.,even though they were not the typical hosts.The effective herbs represent interesting examples of potential trap crops.Different countries can also screen extracts from indigenous herbaceous plants for their ability to induce germination of Orobanche spp.seeds.The use of such species as trap plants could diminish the global soil seed bank of Orobanche.展开更多
文摘分别以CS2和甲醇为溶剂，辅以超声波对先锋褐煤进行常温萃取，利用傅里叶变换红外光谱（FTIR）和气相色谱/质谱（GC/M S ）分析萃取物的组成及结构。结果表明，两种萃取物中共检测到124种有机化合物；CS2萃取物中烃类化合物相对含量较高，占CS2萃取物总量的52．08％，从C14～C30（除C23外）烷连续分布；甲醇萃取物中含氧和含氮化合物相对含量较高，分别占甲醇萃取物总量的39．28％和20．95％；此外还检测到多种生物标示物。
基金supported by the National Natural Science Foundation of China (Grant No. 30870403)State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau (Grant No. 10502-Z7-3)
文摘The co-evolution of Orobanche spp.and their hosts within the same environment has resulted in a high degree of adaptation and effective parasitism whereby the host releases parasite germination stimulants,which are likely to be unstable in the soil.Our objective was to investigate whether extracts from non-host plants,specifically,Chinese medicinal plants,could stimulate germination of Orobanche spp.Samples of 606 Chinese medicinal herb species were extracted with deionized water and methanol.The extracts were used to induce germination of three Orobanche species;Orobanche minor,Orobanche cumana,and Orobanche aegyptiaca.O.minor exhibited a wide range of germination responses to the various herbal extracts.O.cumana and O.aegyptiaca exhibited an intermediate germination response to the herbal extracts.O.minor,which has a narrow host spectrum,showed higher germination rates in response to different herbal extracts compared with those of O.cumana and O.aegyptiaca,which have a broader host spectrum.Methanolic extracts of many Chinese herbal species effectively stimulated seed germination among the Orobanche spp.,even though they were not the typical hosts.The effective herbs represent interesting examples of potential trap crops.Different countries can also screen extracts from indigenous herbaceous plants for their ability to induce germination of Orobanche spp.seeds.The use of such species as trap plants could diminish the global soil seed bank of Orobanche.
